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  1. MariaDB Server
  2. MDEV-25585

rpl.show_status_stop_slave_race-7126 failed in bb, crash after STOP SLAVE

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      Description

      http://buildbot.askmonty.org/buildbot/builders/kvm-asan/builds/5855/steps/mtr_nm/logs/stdio

      10.5 6eb1eed53f7dfe89d370a4d3b

      rpl.show_status_stop_slave_race-7126 'row' w4 [ fail ]
              Test ended at 2021-01-21 13:58:51
       
      CURRENT_TEST: rpl.show_status_stop_slave_race-7126
      /mnt/buildbot/build/mariadb-10.5.9/client/mysqlslap: Cannot run query START SLAVE; STOP SLAVE; SHOW GLOBAL STATUS ERROR : MySQL server has gone away
      Warning:   40 bytes lost at 0x82038210, allocated by T@0 at /mnt/buildbot/build/mariadb-10.5.9/client/mysqlslap: Cannot run query START SLAVE; STOP SLAVE; SHOW GLOBAL STATUS ERROR : Lost connection to MySQL server during query
      mysqltest: In included file "./include/wait_for_slave_param.inc": 
      included from ./include/wait_for_slave_sql_to_stop.inc at line 36:
      included from ./include/wait_for_slave_to_stop.inc at line 34:
      included from /mnt/buildbot/build/mariadb-10.5.9/mysql-test/suite/rpl/t/show_status_stop_slave_race-7126.test at line 19:
      At line 75: query 'let $_slave_check_configured= query_get_value("SHOW SLAVE STATUS", Slave_IO_Running, 1)' failed: 2013: Lost connection to MySQL server during query
       
      The result from queries just before the failure was:
      include/master-slave.inc
      [connection master]
      call mtr.add_suppression("Master is configured to log replication events");
      connection slave;
      connection slave;
      include/wait_for_slave_to_stop.inc
       
       
      Server [mysqld.2 - pid: 5116, winpid: 5116, exit: 256] failed during test run
      Server log from this test:
      ----------SERVER LOG START-----------
      2021-01-21 13:58:44 71 [Note] Deleted Master_info file '/dev/shm/var_auto_fOVT/4/mysqld.2/data/master.info'.
      2021-01-21 13:58:44 71 [Note] Deleted Master_info file '/dev/shm/var_auto_fOVT/4/mysqld.2/data/relay-log.info'.
      2021-01-21 13:58:44 71 [Note] Master connection name: ''  Master_info_file: 'master.info'  Relay_info_file: 'relay-log.info'
      2021-01-21 13:58:44 71 [Note] 'CHANGE MASTER TO executed'. Previous state master_host='127.0.0.1', master_port='16000', master_log_file='', master_log_pos='4'. New state master_host='127.0.0.1', master_port='16000', master_log_file='master-bin.000001', master_log_pos='4'.
      2021-01-21 13:58:44 73 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 4
      2021-01-21 13:58:44 73 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 4
      2021-01-21 13:58:44 74 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 4, relay log './slave-relay-bin.000001' position: 4
      2021-01-21 13:58:45 74 [Note] Error reading relay log event: slave SQL thread was killed
      2021-01-21 13:58:45 74 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 73 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:45 80 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 80 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 81 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000002' position: 1063
      2021-01-21 13:58:45 81 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 80 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:45 82 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 82 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 83 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000002' position: 1063
      2021-01-21 13:58:45 83 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 82 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:45 84 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 84 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 85 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000002' position: 1063
      2021-01-21 13:58:45 85 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 84 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:45 86 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 86 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 87 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000002' position: 1063
      2021-01-21 13:58:45 87 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 86 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:45 88 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 88 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 89 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000002' position: 1063
      2021-01-21 13:58:45 89 [Note] Error reading relay log event: slave SQL thread was killed
      2021-01-21 13:58:45 89 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 88 [ERROR] Slave I/O: Setting @mariadb_slave_capability failed with error: Lost connection to server during query, Internal MariaDB error code: 2013
      2021-01-21 13:58:45 88 [Note] Slave I/O thread killed while calling get_master_version_and_clock(...)
      2021-01-21 13:58:45 88 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:45 90 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 90 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 91 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000002' position: 1063
      2021-01-21 13:58:45 91 [Note] Error reading relay log event: slave SQL thread was killed
      2021-01-21 13:58:45 91 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 90 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:45 92 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 92 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 93 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000005' position: 556
      2021-01-21 13:58:45 93 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 92 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:45 94 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 95 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000005' position: 556
      2021-01-21 13:58:45 95 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 94 [ERROR] Slave I/O: error connecting to master 'root@127.0.0.1:16000' - retry-time: 1  maximum-retries: 10  message: Lost connection to server at 'waiting for initial communication packet', system error: 4 "Interrupted system call", Internal MariaDB error code: 2013
      2021-01-21 13:58:45 94 [Note] Slave I/O thread killed while connecting to master
      2021-01-21 13:58:45 94 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:45 96 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 96 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 97 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000005' position: 556
      2021-01-21 13:58:45 97 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 96 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:45 98 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 98 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 99 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000005' position: 556
      2021-01-21 13:58:45 99 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 98 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:45 100 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 100 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 101 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000005' position: 556
      2021-01-21 13:58:45 101 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 100 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:45 102 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 102 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 103 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000005' position: 556
      2021-01-21 13:58:45 103 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 102 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:45 104 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 104 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 105 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000005' position: 556
      2021-01-21 13:58:45 105 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 104 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:45 106 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:45 106 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 107 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000005' position: 556
      2021-01-21 13:58:46 107 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 106 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 108 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 108 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 109 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000005' position: 556
      2021-01-21 13:58:46 109 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 108 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 110 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 110 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 111 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000005' position: 556
      2021-01-21 13:58:46 111 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 110 [Note] Slave I/O thread killed while calling get_master_version_and_clock(...)
      2021-01-21 13:58:46 110 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 112 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 112 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 113 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000005' position: 556
      2021-01-21 13:58:46 113 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 112 [Note] Slave I/O thread killed while calling get_master_version_and_clock(...)
      2021-01-21 13:58:46 112 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 114 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 114 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 115 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000005' position: 556
      2021-01-21 13:58:46 115 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 114 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 116 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 116 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 117 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000005' position: 556
      2021-01-21 13:58:46 117 [Note] Error reading relay log event: slave SQL thread was killed
      2021-01-21 13:58:46 117 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 116 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 118 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 118 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 119 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000014' position: 556
      2021-01-21 13:58:46 119 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 118 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 120 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 120 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 121 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000014' position: 556
      2021-01-21 13:58:46 121 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 120 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 122 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 122 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 123 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000014' position: 556
      2021-01-21 13:58:46 123 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 122 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 124 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 124 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 125 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000014' position: 556
      2021-01-21 13:58:46 125 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 124 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 126 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 126 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 127 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000014' position: 556
      2021-01-21 13:58:46 127 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 126 [Note] Slave I/O thread killed while calling get_master_version_and_clock(...)
      2021-01-21 13:58:46 126 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 128 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 128 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 129 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000014' position: 556
      2021-01-21 13:58:46 129 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 128 [Note] Slave I/O thread killed while calling get_master_version_and_clock(...)
      2021-01-21 13:58:46 128 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 130 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 130 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 131 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000014' position: 556
      2021-01-21 13:58:46 131 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 130 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 132 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 132 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 133 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000015' position: 304
      2021-01-21 13:58:46 133 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 132 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 134 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 134 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 135 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000015' position: 304
      2021-01-21 13:58:46 135 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 134 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 136 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 136 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 137 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000015' position: 304
      2021-01-21 13:58:46 137 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 136 [Note] Slave I/O thread killed while calling get_master_version_and_clock(...)
      2021-01-21 13:58:46 136 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:46 138 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 138 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 139 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000015' position: 304
      2021-01-21 13:58:46 139 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:46 138 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      2021-01-21 13:58:47 140 [Note] Slave I/O thread: Start asynchronous replication to master 'root@127.0.0.1:16000' in log 'master-bin.000001' at position 763
      2021-01-21 13:58:47 140 [Note] Slave I/O thread: connected to master 'root@127.0.0.1:16000',replication started in log 'master-bin.000001' at position 763
      2021-01-21 13:58:47 141 [Note] Slave SQL thread initialized, starting replication in log 'master-bin.000001' at position 763, relay log './slave-relay-bin.000015' position: 304
      2021-01-21 13:58:47 141 [Note] Slave SQL thread exiting, replication stopped in log 'master-bin.000001' at position 763
      2021-01-21 13:58:47 140 [Note] Slave I/O thread exiting, read up to log 'master-bin.000001', position 763
      210121 13:58:47 [ERROR] mysqld got signal 11 ;
      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.
       
      To report this bug, see https://mariadb.com/kb/en/reporting-bugs
       
      We will try our best to scrape up some info that will hopefully help
      diagnose the problem, but since we have already crashed, 
      something is definitely wrong and this may fail.
       
      Server version: 10.5.9-MariaDB-debug-log
      key_buffer_size=1048576
      read_buffer_size=131072
      max_used_connections=7
      max_threads=153
      thread_count=11
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 62307 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0xac604060
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0xacb691e0 thread_stack 0x49000
      /mnt/buildbot/build/mariadb-10.5.9/sql/mariadbd(my_print_stacktrace+0x3c)[0x812ab975]
      /mnt/buildbot/build/mariadb-10.5.9/sql/mariadbd(handle_fatal_signal+0x394)[0x809cee55]
      addr2line: '': No such file
      [0xb773dc14]
      vio/viosocket.c:325(vio_socket_shutdown)[0x80c01235]
      sql/sql_class.cc:1940(THD::awake_no_mutex(killed_state))[0x8060227b]
      sql/slave.cc:1234(terminate_slave_thread(THD*, st_mysql_mutex*, st_mysql_cond*, unsigned int volatile*, bool))[0x80567752]
      sql/slave.cc:1114(terminate_slave_threads(Master_info*, int, bool))[0x805671d3]
      sql/sql_repl.cc:3317(stop_slave(THD*, Master_info*, bool))[0x806bb76d]
      sql/sql_parse.cc:4314(mysql_execute_command(THD*))[0x8067ea28]
      sql/sql_parse.cc:8062(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x8068c2ba]
      sql/sql_parse.cc:1989(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x80677716]
      sql/sql_parse.cc:1371(do_command(THD*))[0x80675655]
      sql/sql_connect.cc:1410(do_handle_one_connection(CONNECT*, bool))[0x8080eb92]
      sql/sql_connect.cc:1312(handle_one_connection)[0x8080e8ad]
      perfschema/pfs.cc:2201(pfs_spawn_thread)[0x80d07f42]
      ??:0(start_thread)[0xb731d2b5]
      ??:0(clone)[0xb705916e]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0xac60fd6d): STOP SLAVE
       
      Connection ID (thread ID): 79
      Status: NOT_KILLED
       
      Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off
       
      The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ contains
      information that should help you find out what is causing the crash.
      Writing a core file...
      Working directory at /dev/shm/var_auto_fOVT/4/mysqld.2/data
      Resource Limits:
      Limit                     Soft Limit           Hard Limit           Units     
      Max cpu time              unlimited            unlimited            seconds   
      Max file size             unlimited            unlimited            bytes     
      Max data size             unlimited            unlimited            bytes     
      Max stack size            8388608              unlimited            bytes     
      Max core file size        unlimited            unlimited            bytes     
      Max resident set          unlimited            unlimited            bytes     
      Max processes             48287                48287                processes 
      Max open files            1024                 1024                 files     
      Max locked memory         65536                65536                bytes     
      Max address space         unlimited            unlimited            bytes     
      Max file locks            unlimited            unlimited            locks     
      Max pending signals       48287                48287                signals   
      Max msgqueue size         819200               819200               bytes     
      Max nice priority         0                    0                    
      Max realtime priority     0                    0                    
      Max realtime timeout      unlimited            unlimited            us        
      Core pattern: |/usr/share/apport/apport %p %s %c %P
       
      ----------SERVER LOG END-------------
       
       
       - found 'core' (0/0)
       
      Trying 'dbx' to get a backtrace
       
      Trying 'gdb' to get a backtrace from coredump /mnt/buildbot/build/mariadb-10.5.9/mysql-test/var/4/log/rpl.show_status_stop_slave_race-7126-row/mysqld.2/data/core
      Core generated by '/mnt/buildbot/build/mariadb-10.5.9/sql/mariadbd'
      Output from gdb follows. The first stack trace is from the failing thread.
      The following stack traces are from all threads (so the failing one is
      duplicated).
      --------------------------
      [New LWP 6190]
      [New LWP 5123]
      [New LWP 5126]
      [New LWP 5124]
      [New LWP 5117]
      [New LWP 5129]
      [New LWP 5125]
      [New LWP 6189]
      [New LWP 5131]
      [New LWP 5157]
      [New LWP 6357]
      [New LWP 5147]
      [New LWP 5154]
      [New LWP 6186]
      [New LWP 5137]
      [New LWP 5141]
      [New LWP 5135]
      [New LWP 5138]
      [New LWP 5134]
      [New LWP 5136]
      [New LWP 5133]
      [New LWP 5132]
      [Thread debugging using libthread_db enabled]
      Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
      Core was generated by `/mnt/buildbot/build/mariadb-10.5.9/sql/mariadbd --defaults-group-suffix=.2 --de'.
      Program terminated with signal SIGSEGV, Segmentation fault.
      #0  0xb773dc31 in __kernel_vsyscall ()
      [Current thread is 1 (Thread 0xacb69b40 (LWP 6190))]
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb7323ce1 in pthread_kill () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x812aba6f in my_write_core (sig=11) at /home/buildbot/buildbot/build/mariadb-10.5.9/mysys/stacktrace.c:424
      #3  0x809cf1c3 in handle_fatal_signal (sig=11) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/signal_handler.cc:330
      #4  <signal handler called>
      #5  0x80c01235 in vio_socket_shutdown (vio=0x0, how=2) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:325
      #6  0x8060227b in THD::awake_no_mutex (this=0xafcab588, state_to_set=NOT_KILLED) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_class.cc:1940
      #7  0x80567752 in terminate_slave_thread (thd=0xafcab588, term_lock=0x835dcf38, term_cond=0x835dd0cc, slave_running=0x835dfe18, skip_lock=false) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/slave.cc:1234
      #8  0x805671d3 in terminate_slave_threads (mi=0x835db6d0, thread_mask=3, skip_lock=false) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/slave.cc:1114
      #9  0x806bb76d in stop_slave (thd=0xac604060, mi=0x835db6d0, net_report=true) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_repl.cc:3317
      #10 0x8067ea28 in mysql_execute_command (thd=0xac604060) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_parse.cc:4314
      #11 0x8068c2ba in mysql_parse (thd=0xac604060, rawbuf=0xac60fd6d "STOP SLAVE; SHOW GLOBAL STATUS", length=30, parser_state=0xacb68b3c, is_com_multi=false, is_next_command=false) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_parse.cc:8062
      #12 0x80677716 in dispatch_command (command=COM_QUERY, thd=0xac604060, packet=0xac646799 "", packet_length=43, is_com_multi=false, is_next_command=false) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_parse.cc:1989
      #13 0x80675655 in do_command (thd=0xac604060) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_parse.cc:1371
      #14 0x8080eb92 in do_handle_one_connection (connect=0x835e9000, put_in_cache=true) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_connect.cc:1410
      #15 0x8080e8ad in handle_one_connection (arg=0x835e9000) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_connect.cc:1312
      #16 0x80d07f42 in pfs_spawn_thread (arg=0x83336170) at /home/buildbot/buildbot/build/mariadb-10.5.9/storage/perfschema/pfs.cc:2201
      #17 0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #18 0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 22 (Thread 0xae5ffb40 (LWP 5132)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb7322e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x8130ecce in __gthread_cond_timedwait (__cond=0x8335c1b8, __mutex=0x8327e2d8, __abs_timeout=0xae5ff0b0) at /usr/include/i386-linux-gnu/c++/5/bits/gthr-default.h:871
      #3  0x81313b77 in std::condition_variable::__wait_until_impl<std::chrono::duration<long long, std::ratio<1ll, 1000000000ll> > > (this=0x8335c1b8, __lock=..., __atime=...) at /usr/include/c++/5/condition_variable:165
      #4  0x81312c2c in std::condition_variable::wait_until<std::chrono::duration<long long, std::ratio<1ll, 1000000000ll> > > (this=0x8335c1b8, __lock=..., __atime=...) at /usr/include/c++/5/condition_variable:105
      #5  0x813121ed in std::condition_variable::wait_for<long long, std::ratio<1ll, 1000ll> > (this=0x8335c1b8, __lock=..., __rtime=...) at /usr/include/c++/5/condition_variable:137
      #6  0x8130ef21 in tpool::thread_pool_generic::wait_for_tasks (this=0x8327e230, lk=..., thread_data=0x8335c1b8) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/tpool_generic.cc:446
      #7  0x8130f12b in tpool::thread_pool_generic::get_task (this=0x8327e230, thread_var=0x8335c1b8, t=0xae5ff18c) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/tpool_generic.cc:499
      #8  0x8130f3c2 in tpool::thread_pool_generic::worker_main (this=0x8327e230, thread_var=0x8335c1b8) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/tpool_generic.cc:544
      #9  0x81316e75 in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::worker_data*, void>(tpool::thread_pool_generic*, tpool::worker_data*&&) const (this=0x8348ba30, __object=0x8327e230) at /usr/include/c++/5/functional:600
      #10 0x81316e06 in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0u, 1u>(std::_Index_tuple<0u, 1u>) (this=0x8348ba28) at /usr/include/c++/5/functional:1531
      #11 0x81316c6b in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x8348ba28) at /usr/include/c++/5/functional:1520
      #12 0x81316bf2 in std::thread::_Impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x8348ba1c) at /usr/include/c++/5/thread:115
      #13 0xb72375de in ?? () from /usr/lib/i386-linux-gnu/libstdc++.so.6
      #14 0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #15 0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 21 (Thread 0xadbffb40 (LWP 5133)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb7322e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x8130ecce in __gthread_cond_timedwait (__cond=0x8335c138, __mutex=0x8327e2d8, __abs_timeout=0xadbff0b0) at /usr/include/i386-linux-gnu/c++/5/bits/gthr-default.h:871
      #3  0x81313b77 in std::condition_variable::__wait_until_impl<std::chrono::duration<long long, std::ratio<1ll, 1000000000ll> > > (this=0x8335c138, __lock=..., __atime=...) at /usr/include/c++/5/condition_variable:165
      #4  0x81312c2c in std::condition_variable::wait_until<std::chrono::duration<long long, std::ratio<1ll, 1000000000ll> > > (this=0x8335c138, __lock=..., __atime=...) at /usr/include/c++/5/condition_variable:105
      #5  0x813121ed in std::condition_variable::wait_for<long long, std::ratio<1ll, 1000ll> > (this=0x8335c138, __lock=..., __rtime=...) at /usr/include/c++/5/condition_variable:137
      #6  0x8130ef21 in tpool::thread_pool_generic::wait_for_tasks (this=0x8327e230, lk=..., thread_data=0x8335c138) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/tpool_generic.cc:446
      #7  0x8130f12b in tpool::thread_pool_generic::get_task (this=0x8327e230, thread_var=0x8335c138, t=0xadbff18c) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/tpool_generic.cc:499
      #8  0x8130f3c2 in tpool::thread_pool_generic::worker_main (this=0x8327e230, thread_var=0x8335c138) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/tpool_generic.cc:544
      #9  0x81316e75 in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::worker_data*, void>(tpool::thread_pool_generic*, tpool::worker_data*&&) const (this=0xb06068f0, __object=0x8327e230) at /usr/include/c++/5/functional:600
      #10 0x81316e06 in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0u, 1u>(std::_Index_tuple<0u, 1u>) (this=0xb06068e8) at /usr/include/c++/5/functional:1531
      #11 0x81316c6b in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0xb06068e8) at /usr/include/c++/5/functional:1520
      #12 0x81316bf2 in std::thread::_Impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0xb06068dc) at /usr/include/c++/5/thread:115
      #13 0xb72375de in ?? () from /usr/lib/i386-linux-gnu/libstdc++.so.6
      #14 0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #15 0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 20 (Thread 0xafdfcb40 (LWP 5136)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb7322a8c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x812b06c8 in safe_cond_wait (cond=0x81f03a44 <mysql_bin_log+3332>, mp=0x81f039e0 <mysql_bin_log+3232>, file=0x815bfe68 "/home/buildbot/buildbot/build/mariadb-10.5.9/include/mysql/psi/mysql_thread.h", line=1222) at /home/buildbot/buildbot/build/mariadb-10.5.9/mysys/thr_mutex.c:492
      #3  0x80afa7a2 in inline_mysql_cond_wait (that=0x81f03a44 <mysql_bin_log+3332>, mutex=0x81f039e0 <mysql_bin_log+3232>, src_file=0x815c1004 "/home/buildbot/buildbot/build/mariadb-10.5.9/sql/log.cc", src_line=10329) at /home/buildbot/buildbot/build/mariadb-10.5.9/include/mysql/psi/mysql_thread.h:1222
      #4  0x80b18da7 in binlog_background_thread (arg=0x0) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/log.cc:10329
      #5  0x80d07f42 in pfs_spawn_thread (arg=0x83336bd8) at /home/buildbot/buildbot/build/mariadb-10.5.9/storage/perfschema/pfs.cc:2201
      #6  0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #7  0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 19 (Thread 0xad3feb40 (LWP 5134)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb7322e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x8130ecce in __gthread_cond_timedwait (__cond=0x8335c0b8, __mutex=0x8327e2d8, __abs_timeout=0xad3fe0b0) at /usr/include/i386-linux-gnu/c++/5/bits/gthr-default.h:871
      #3  0x81313b77 in std::condition_variable::__wait_until_impl<std::chrono::duration<long long, std::ratio<1ll, 1000000000ll> > > (this=0x8335c0b8, __lock=..., __atime=...) at /usr/include/c++/5/condition_variable:165
      #4  0x81312c2c in std::condition_variable::wait_until<std::chrono::duration<long long, std::ratio<1ll, 1000000000ll> > > (this=0x8335c0b8, __lock=..., __atime=...) at /usr/include/c++/5/condition_variable:105
      #5  0x813121ed in std::condition_variable::wait_for<long long, std::ratio<1ll, 1000ll> > (this=0x8335c0b8, __lock=..., __rtime=...) at /usr/include/c++/5/condition_variable:137
      #6  0x8130ef21 in tpool::thread_pool_generic::wait_for_tasks (this=0x8327e230, lk=..., thread_data=0x8335c0b8) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/tpool_generic.cc:446
      #7  0x8130f12b in tpool::thread_pool_generic::get_task (this=0x8327e230, thread_var=0x8335c0b8, t=0xad3fe18c) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/tpool_generic.cc:499
      #8  0x8130f3c2 in tpool::thread_pool_generic::worker_main (this=0x8327e230, thread_var=0x8335c0b8) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/tpool_generic.cc:544
      #9  0x81316e75 in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::worker_data*, void>(tpool::thread_pool_generic*, tpool::worker_data*&&) const (this=0xb0606938, __object=0x8327e230) at /usr/include/c++/5/functional:600
      #10 0x81316e06 in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0u, 1u>(std::_Index_tuple<0u, 1u>) (this=0xb0606930) at /usr/include/c++/5/functional:1531
      #11 0x81316c6b in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0xb0606930) at /usr/include/c++/5/functional:1520
      #12 0x81316bf2 in std::thread::_Impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0xb0606924) at /usr/include/c++/5/thread:115
      #13 0xb72375de in ?? () from /usr/lib/i386-linux-gnu/libstdc++.so.6
      #14 0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #15 0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 18 (Thread 0xafd68b40 (LWP 5138)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb7322a8c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x812b06c8 in safe_cond_wait (cond=0x81ed8200 <COND_slave_background>, mp=0x81eda740 <LOCK_slave_background>, file=0x8137bf68 "/home/buildbot/buildbot/build/mariadb-10.5.9/include/mysql/psi/mysql_thread.h", line=1222) at /home/buildbot/buildbot/build/mariadb-10.5.9/mysys/thr_mutex.c:492
      #3  0x80563f17 in inline_mysql_cond_wait (that=0x81ed8200 <COND_slave_background>, mutex=0x81eda740 <LOCK_slave_background>, src_file=0x8137d124 "/home/buildbot/buildbot/build/mariadb-10.5.9/sql/slave.cc", src_line=525) at /home/buildbot/buildbot/build/mariadb-10.5.9/include/mysql/psi/mysql_thread.h:1222
      #4  0x8056595f in handle_slave_background (arg=0x0) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/slave.cc:525
      #5  0x80d07f42 in pfs_spawn_thread (arg=0x83517960) at /home/buildbot/buildbot/build/mariadb-10.5.9/storage/perfschema/pfs.cc:2201
      #6  0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #7  0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 17 (Thread 0xab6deb40 (LWP 5135)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb7322e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x8130ecce in __gthread_cond_timedwait (__cond=0x8335c038, __mutex=0x8327e2d8, __abs_timeout=0xab6de0b0) at /usr/include/i386-linux-gnu/c++/5/bits/gthr-default.h:871
      #3  0x81313b77 in std::condition_variable::__wait_until_impl<std::chrono::duration<long long, std::ratio<1ll, 1000000000ll> > > (this=0x8335c038, __lock=..., __atime=...) at /usr/include/c++/5/condition_variable:165
      #4  0x81312c2c in std::condition_variable::wait_until<std::chrono::duration<long long, std::ratio<1ll, 1000000000ll> > > (this=0x8335c038, __lock=..., __atime=...) at /usr/include/c++/5/condition_variable:105
      #5  0x813121ed in std::condition_variable::wait_for<long long, std::ratio<1ll, 1000ll> > (this=0x8335c038, __lock=..., __rtime=...) at /usr/include/c++/5/condition_variable:137
      #6  0x8130ef21 in tpool::thread_pool_generic::wait_for_tasks (this=0x8327e230, lk=..., thread_data=0x8335c038) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/tpool_generic.cc:446
      #7  0x8130f12b in tpool::thread_pool_generic::get_task (this=0x8327e230, thread_var=0x8335c038, t=0xab6de18c) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/tpool_generic.cc:499
      #8  0x8130f3c2 in tpool::thread_pool_generic::worker_main (this=0x8327e230, thread_var=0x8335c038) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/tpool_generic.cc:544
      #9  0x81316e75 in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::worker_data*, void>(tpool::thread_pool_generic*, tpool::worker_data*&&) const (this=0xb0606c28, __object=0x8327e230) at /usr/include/c++/5/functional:600
      #10 0x81316e06 in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0u, 1u>(std::_Index_tuple<0u, 1u>) (this=0xb0606c20) at /usr/include/c++/5/functional:1531
      #11 0x81316c6b in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0xb0606c20) at /usr/include/c++/5/functional:1520
      #12 0x81316bf2 in std::thread::_Impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0xb0606c14) at /usr/include/c++/5/thread:115
      #13 0xb72375de in ?? () from /usr/lib/i386-linux-gnu/libstdc++.so.6
      #14 0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #15 0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 16 (Thread 0xae7f3b40 (LWP 5141)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb704ef8f in poll () from /lib/i386-linux-gnu/libc.so.6
      #2  0x80c024d1 in vio_io_wait (vio=0xafc12638, event=VIO_IO_EVENT_READ, timeout=28800000) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:1000
      #3  0x80c00b62 in vio_socket_io_wait (vio=0xafc12638, event=VIO_IO_EVENT_READ) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:118
      #4  0x80c00d52 in vio_read (vio=0xafc12638, buf=0xafc42aa8 "\001", size=4) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:199
      #5  0x80b5af52 in my_real_read (net=0xafc017e4, complen=0xae7f30c8, header=1 '\001') at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/net_serv.cc:979
      #6  0x80b5b79d in my_net_read_packet_reallen (net=0xafc017e4, read_from_server=1 '\001', reallen=0xae7f313c) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/net_serv.cc:1260
      #7  0x80b5b74f in my_net_read_packet (net=0xafc017e4, read_from_server=1 '\001') at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/net_serv.cc:1244
      #8  0x80674f9a in do_command (thd=0xafc01610) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_parse.cc:1234
      #9  0x8080eb92 in do_handle_one_connection (connect=0x835e9000, put_in_cache=true) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_connect.cc:1410
      #10 0x8080e8ad in handle_one_connection (arg=0x835e6058) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_connect.cc:1312
      #11 0x80d07f42 in pfs_spawn_thread (arg=0x835e69c0) at /home/buildbot/buildbot/build/mariadb-10.5.9/storage/perfschema/pfs.cc:2201
      #12 0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #13 0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 15 (Thread 0xafdb2b40 (LWP 5137)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb6f9ee8c in sigwaitinfo () from /lib/i386-linux-gnu/libc.so.6
      #2  0x805302e4 in my_sigwait (set=0xafdb2190, sig=0xafdb2160, code=0xafdb2164) at /home/buildbot/buildbot/build/mariadb-10.5.9/include/my_pthread.h:196
      #3  0x80535c8c in signal_hand (arg=0x0) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/mysqld.cc:2988
      #4  0x80d07f42 in pfs_spawn_thread (arg=0x835131a0) at /home/buildbot/buildbot/build/mariadb-10.5.9/storage/perfschema/pfs.cc:2201
      #5  0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #6  0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 14 (Thread 0xacbfdb40 (LWP 6186)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb704ef8f in poll () from /lib/i386-linux-gnu/libc.so.6
      #2  0x80c024d1 in vio_io_wait (vio=0xafca5b40, event=VIO_IO_EVENT_READ, timeout=28800000) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:1000
      #3  0x80c00b62 in vio_socket_io_wait (vio=0xafca5b40, event=VIO_IO_EVENT_READ) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:118
      #4  0x80c00d52 in vio_read (vio=0xafca5b40, buf=0xafc06880 "\a", size=4) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:199
      #5  0x80b5af52 in my_real_read (net=0xafc7cc04, complen=0xacbfd0c8, header=1 '\001') at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/net_serv.cc:979
      #6  0x80b5b79d in my_net_read_packet_reallen (net=0xafc7cc04, read_from_server=1 '\001', reallen=0xacbfd13c) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/net_serv.cc:1260
      #7  0x80b5b74f in my_net_read_packet (net=0xafc7cc04, read_from_server=1 '\001') at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/net_serv.cc:1244
      #8  0x80674f9a in do_command (thd=0xafc7ca30) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_parse.cc:1234
      #9  0x8080eb92 in do_handle_one_connection (connect=0x835e9000, put_in_cache=true) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_connect.cc:1410
      #10 0x8080e8ad in handle_one_connection (arg=0x835e9000) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_connect.cc:1312
      #11 0x80d07f42 in pfs_spawn_thread (arg=0x83336170) at /home/buildbot/buildbot/build/mariadb-10.5.9/storage/perfschema/pfs.cc:2201
      #12 0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #13 0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 13 (Thread 0xae75fb40 (LWP 5154)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb704ef8f in poll () from /lib/i386-linux-gnu/libc.so.6
      #2  0x80c024d1 in vio_io_wait (vio=0xb32e3760, event=VIO_IO_EVENT_READ, timeout=28800000) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:1000
      #3  0x80c00b62 in vio_socket_io_wait (vio=0xb32e3760, event=VIO_IO_EVENT_READ) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:118
      #4  0x80c00d52 in vio_read (vio=0xb32e3760, buf=0xb3207640 "\001", size=4) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:199
      #5  0x80b5af52 in my_real_read (net=0xb3202524, complen=0xae75f0c8, header=1 '\001') at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/net_serv.cc:979
      #6  0x80b5b79d in my_net_read_packet_reallen (net=0xb3202524, read_from_server=1 '\001', reallen=0xae75f13c) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/net_serv.cc:1260
      #7  0x80b5b74f in my_net_read_packet (net=0xb3202524, read_from_server=1 '\001') at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/net_serv.cc:1244
      #8  0x80674f9a in do_command (thd=0xb3202350) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_parse.cc:1234
      #9  0x8080eb92 in do_handle_one_connection (connect=0x835e9120, put_in_cache=true) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_connect.cc:1410
      #10 0x8080e8ad in handle_one_connection (arg=0x835e6058) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_connect.cc:1312
      #11 0x80d07f42 in pfs_spawn_thread (arg=0x835e69c0) at /home/buildbot/buildbot/build/mariadb-10.5.9/storage/perfschema/pfs.cc:2201
      #12 0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #13 0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 12 (Thread 0xae7a9b40 (LWP 5147)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb704ef8f in poll () from /lib/i386-linux-gnu/libc.so.6
      #2  0x80c024d1 in vio_io_wait (vio=0xb1e3b750, event=VIO_IO_EVENT_READ, timeout=28800000) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:1000
      #3  0x80c00b62 in vio_socket_io_wait (vio=0xb1e3b750, event=VIO_IO_EVENT_READ) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:118
      #4  0x80c00d52 in vio_read (vio=0xb1e3b750, buf=0xb1e068d8 "\001", size=4) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:199
      #5  0x80b5af52 in my_real_read (net=0xb1e01784, complen=0xae7a90c8, header=1 '\001') at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/net_serv.cc:979
      #6  0x80b5b79d in my_net_read_packet_reallen (net=0xb1e01784, read_from_server=1 '\001', reallen=0xae7a913c) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/net_serv.cc:1260
      #7  0x80b5b74f in my_net_read_packet (net=0xb1e01784, read_from_server=1 '\001') at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/net_serv.cc:1244
      #8  0x80674f9a in do_command (thd=0xb1e015b0) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_parse.cc:1234
      #9  0x8080eb92 in do_handle_one_connection (connect=0x835e4988, put_in_cache=true) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_connect.cc:1410
      #10 0x8080e8ad in handle_one_connection (arg=0x835e6058) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_connect.cc:1312
      #11 0x80d07f42 in pfs_spawn_thread (arg=0x835e69c0) at /home/buildbot/buildbot/build/mariadb-10.5.9/storage/perfschema/pfs.cc:2201
      #12 0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #13 0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 11 (Thread 0xadd6ab40 (LWP 6357)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb7325d32 in __lll_lock_wait () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0xb731f9e5 in pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
      #3  0x812aff01 in safe_mutex_lock (mp=0x835dcf38, my_flags=0, file=0x8137d124 "/home/buildbot/buildbot/build/mariadb-10.5.9/sql/slave.cc", line=5145) at /home/buildbot/buildbot/build/mariadb-10.5.9/mysys/thr_mutex.c:290
      #4  0x80563d1e in inline_mysql_mutex_lock (that=0x835dcf38, src_file=0x8137d124 "/home/buildbot/buildbot/build/mariadb-10.5.9/sql/slave.cc", src_line=5145) at /home/buildbot/buildbot/build/mariadb-10.5.9/include/mysql/psi/mysql_thread.h:750
      #5  0x80573aa3 in handle_slave_io (arg=0x835db6d0) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/slave.cc:5145
      #6  0x80d07f42 in pfs_spawn_thread (arg=0xac6009b8) at /home/buildbot/buildbot/build/mariadb-10.5.9/storage/perfschema/pfs.cc:2201
      #7  0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #8  0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 10 (Thread 0xaddfeb40 (LWP 5157)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb704ef8f in poll () from /lib/i386-linux-gnu/libc.so.6
      #2  0x80c024d1 in vio_io_wait (vio=0x835e5c00, event=VIO_IO_EVENT_READ, timeout=28800000) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:1000
      #3  0x80c00b62 in vio_socket_io_wait (vio=0x835e5c00, event=VIO_IO_EVENT_READ) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:118
      #4  0x80c00d52 in vio_read (vio=0x835e5c00, buf=0x83645118 "\001", size=4) at /home/buildbot/buildbot/build/mariadb-10.5.9/vio/viosocket.c:199
      #5  0x80b5af52 in my_real_read (net=0x835f5274, complen=0xaddfe0c8, header=1 '\001') at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/net_serv.cc:979
      #6  0x80b5b79d in my_net_read_packet_reallen (net=0x835f5274, read_from_server=1 '\001', reallen=0xaddfe13c) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/net_serv.cc:1260
      #7  0x80b5b74f in my_net_read_packet (net=0x835f5274, read_from_server=1 '\001') at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/net_serv.cc:1244
      #8  0x80674f9a in do_command (thd=0x835f50a0) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_parse.cc:1234
      #9  0x8080eb92 in do_handle_one_connection (connect=0x835e4988, put_in_cache=true) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_connect.cc:1410
      #10 0x8080e8ad in handle_one_connection (arg=0x835e6058) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_connect.cc:1312
      #11 0x80d07f42 in pfs_spawn_thread (arg=0x835e69c0) at /home/buildbot/buildbot/build/mariadb-10.5.9/storage/perfschema/pfs.cc:2201
      #12 0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #13 0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 9 (Thread 0xaeff4b40 (LWP 5131)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb7322e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x8130ecce in __gthread_cond_timedwait (__cond=0x8335c238, __mutex=0x8327e2d8, __abs_timeout=0xaeff40b0) at /usr/include/i386-linux-gnu/c++/5/bits/gthr-default.h:871
      #3  0x81313b77 in std::condition_variable::__wait_until_impl<std::chrono::duration<long long, std::ratio<1ll, 1000000000ll> > > (this=0x8335c238, __lock=..., __atime=...) at /usr/include/c++/5/condition_variable:165
      #4  0x81312c2c in std::condition_variable::wait_until<std::chrono::duration<long long, std::ratio<1ll, 1000000000ll> > > (this=0x8335c238, __lock=..., __atime=...) at /usr/include/c++/5/condition_variable:105
      #5  0x813121ed in std::condition_variable::wait_for<long long, std::ratio<1ll, 1000ll> > (this=0x8335c238, __lock=..., __rtime=...) at /usr/include/c++/5/condition_variable:137
      #6  0x8130ef21 in tpool::thread_pool_generic::wait_for_tasks (this=0x8327e230, lk=..., thread_data=0x8335c238) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/tpool_generic.cc:446
      #7  0x8130f12b in tpool::thread_pool_generic::get_task (this=0x8327e230, thread_var=0x8335c238, t=0xaeff418c) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/tpool_generic.cc:499
      #8  0x8130f3c2 in tpool::thread_pool_generic::worker_main (this=0x8327e230, thread_var=0x8335c238) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/tpool_generic.cc:544
      #9  0x81316e75 in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::worker_data*, void>(tpool::thread_pool_generic*, tpool::worker_data*&&) const (this=0xb3201350, __object=0x8327e230) at /usr/include/c++/5/functional:600
      #10 0x81316e06 in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0u, 1u>(std::_Index_tuple<0u, 1u>) (this=0xb3201348) at /usr/include/c++/5/functional:1531
      #11 0x81316c6b in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0xb3201348) at /usr/include/c++/5/functional:1520
      #12 0x81316bf2 in std::thread::_Impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0xb320133c) at /usr/include/c++/5/thread:115
      #13 0xb72375de in ?? () from /usr/lib/i386-linux-gnu/libstdc++.so.6
      #14 0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #15 0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 8 (Thread 0xacbb3b40 (LWP 6189)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb7325d32 in __lll_lock_wait () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0xb731f8be in pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
      #3  0x812aff01 in safe_mutex_lock (mp=0x835dd000, my_flags=0, file=0x8137d124 "/home/buildbot/buildbot/build/mariadb-10.5.9/sql/slave.cc", line=253) at /home/buildbot/buildbot/build/mariadb-10.5.9/mysys/thr_mutex.c:290
      #4  0x80563d1e in inline_mysql_mutex_lock (that=0x835dd000, src_file=0x8137d124 "/home/buildbot/buildbot/build/mariadb-10.5.9/sql/slave.cc", src_line=253) at /home/buildbot/buildbot/build/mariadb-10.5.9/include/mysql/psi/mysql_thread.h:750
      #5  0x80564e24 in Master_info::lock_slave_threads (this=0x835db6d0) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/slave.cc:253
      #6  0x806baf72 in start_slave (thd=0xb1e5f8b0, mi=0x835db6d0, net_report=true) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_repl.cc:3104
      #7  0x8067e8e9 in mysql_execute_command (thd=0xb1e5f8b0) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_parse.cc:4278
      #8  0x8068c2ba in mysql_parse (thd=0xb1e5f8b0, rawbuf=0xb1e1a890 "START SLAVE; STOP SLAVE; SHOW GLOBAL STATUS", length=43, parser_state=0xacbb2b3c, is_com_multi=false, is_next_command=false) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_parse.cc:8062
      #9  0x806770c2 in dispatch_command (command=COM_QUERY, thd=0xb1e5f8b0, packet=0xb1e55ab9 "START SLAVE; STOP SLAVE; SHOW GLOBAL STATUS", packet_length=43, is_com_multi=false, is_next_command=false) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_parse.cc:1890
      #10 0x80675655 in do_command (thd=0xb1e5f8b0) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_parse.cc:1371
      #11 0x8080eb92 in do_handle_one_connection (connect=0x835e9120, put_in_cache=true) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_connect.cc:1410
      #12 0x8080e8ad in handle_one_connection (arg=0x835e9120) at /home/buildbot/buildbot/build/mariadb-10.5.9/sql/sql_connect.cc:1312
      #13 0x80d07f42 in pfs_spawn_thread (arg=0x83336170) at /home/buildbot/buildbot/build/mariadb-10.5.9/storage/perfschema/pfs.cc:2201
      #14 0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #15 0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 7 (Thread 0xb19feb40 (LWP 5125)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb7054bb7 in syscall () from /lib/i386-linux-gnu/libc.so.6
      #2  0x81317a74 in my_getevents (ctx=0xb1f15000, min_nr=1, nr=256, ev=0xb19fc1c0) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/aio_linux.cc:64
      #3  0x81317bd9 in tpool::aio_linux::getevent_thread_routine (aio=0x83221710) at /home/buildbot/buildbot/build/mariadb-10.5.9/tpool/aio_linux.cc:107
      #4  0x81319220 in std::_Bind_simple<void (*(tpool::aio_linux*))(tpool::aio_linux*)>::_M_invoke<0u>(std::_Index_tuple<0u>) (this=0x83218f68) at /usr/include/c++/5/functional:1531
      #5  0x813190f5 in std::_Bind_simple<void (*(tpool::aio_linux*))(tpool::aio_linux*)>::operator()() (this=0x83218f68) at /usr/include/c++/5/functional:1520
      #6  0x8131907c in std::thread::_Impl<std::_Bind_simple<void (*(tpool::aio_linux*))(tpool::aio_linux*)> >::_M_run() (this=0x83218f5c) at /usr/include/c++/5/thread:115
      #7  0xb72375de in ?? () from /usr/lib/i386-linux-gnu/libstdc++.so.6
      #8  0xb731d2b5 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
      #9  0xb705916e in clone () from /lib/i386-linux-gnu/libc.so.6
       
      Thread 6 (Thread 0xaf7f5b40 (LWP 5129)):
      #0  0xb773dc31 in __kernel_vsyscall ()
      #1  0xb7322e56 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
      #2  0x8130ecce in __gthread_cond_timedwait (__cond=0x8335c2b8, __mutex=0x8327e2d8, __abs_timeout=0xaf7f50b0) at /usr/include/i386-linux-gnu/c++/5/bits/gthr-default.h:871
      #3  0x81313b77 in std::condition_variable::__wait_until_impl<std::chrono::duration<long long, std::ratio<1ll, 1000000000ll> > > (this=0x8335c2b8, __lock=..., __atime=...) at /usr/include/c++/5/condition_variable:165
      #4  0x81312c2c in std::condition_variable::wait_until<std::chrono::duration<long long, std::ratio<1ll, 1000000000ll> > > (this=0x8335c2b8, __lock=..., __atime=...) at /usr/include/c++/5/condition_variable:105
      #5  0x813121ed in std::condition_variable::wait_for<long long, std::ratio<1ll, 1000ll> > (this=0x8335c2b8, __lock=..., __rtime=...) at /usr/include/c++/5/condition_variable:137
      #6  0x8130ef21 in tpool::thread_pool_generic::wait_for_tasks (this=0x8327e2
      

      the similar failure happened before after rpl.rpl_relayspace, rpl.rpl_stop_slave, rpl.rpl_ssl1, rpl.rpl_stm_start_stop_slave cross reference bb

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            Assignee:
            sachin.setiya.007 Sachin Setiya
            Reporter:
            alice Alice Sherepa
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              Created:
              Updated: