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Upgraded node 3 is stopped with signal 6 on attempt to join the cluster with not yet upgraded nodes.
This issue was discovered on testing of Rolling Upgrade according to "MariaDB 10.4 Cluster Rolling Upgrade - Naive Approach" by Seppo Jaakola: https://docs.google.com/document/d/1z4XTpLpzStWMFaNnrSmiESaIVeCoKhu9Hbb1SrDPf0w
10.4.3-MariaDB-debug built from sources: commit 3f154943db8bc4135fb3c60b8a74f926b65a040b
galera4 lib: commit 9cdbeb86c330b808571b14270e6428accb899c58
Steps:
1. Start 3 MariaDB 10.3 nodes with mtr:
1.0. export WSREP_PROVIDER=/usr/lib/libgalera_smm_3.so
1.1. cd mysql-test
1.2. "./mtr --suite=galera_3nodes --start-and-exit"
Actual results:
3 servers are running:
Started [mysqld.1 - pid: 8432, winpid: 8432] [mysqld.2 - pid: 8433, winpid: 8433] [mysqld.3 - pid: 8434, winpid: 8434]
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worker[1] Using config for test galera_3nodes.galera_certification_ccc
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worker[1] Port and socket path for server(s):
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worker[1] mysqld.1 16000 /home/stepan/mariadb/10.3/mysql-test/var/tmp/mysqld.1.sock
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worker[1] mysqld.2 16001 /home/stepan/mariadb/10.3/mysql-test/var/tmp/mysqld.2.sock
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worker[1] mysqld.3 16002 /home/stepan/mariadb/10.3/mysql-test/var/tmp/mysqld.3.sock
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$ ps -ef | grep mysqld
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stepan 8432 1 1 19:46 pts/2 00:00:01 /home/stepan/mariadb/10.3/sql/mysqld --defaults-group-suffix=.1 --defaults-file=/home/stepan/mariadb/10.3/mysql-test/var/my.cnf --log-output=file --innodb --innodb-cmpmem --innodb-cmp-per-index --innodb-trx --innodb-locks --innodb-lock-waits --innodb-metrics --innodb-buffer-pool-stats --innodb-buffer-page --innodb-buffer-page-lru --innodb-sys-columns --innodb-sys-fields --innodb-sys-foreign --innodb-sys-foreign-cols --innodb-sys-indexes --innodb-sys-tables --innodb-sys-virtual --core-file --loose-debug-sync-timeout=300
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stepan 8433 1 1 19:46 pts/2 00:00:01 /home/stepan/mariadb/10.3/sql/mysqld --defaults-group-suffix=.2 --defaults-file=/home/stepan/mariadb/10.3/mysql-test/var/my.cnf --log-output=file --innodb --innodb-cmpmem --innodb-cmp-per-index --innodb-trx --innodb-locks --innodb-lock-waits --innodb-metrics --innodb-buffer-pool-stats --innodb-buffer-page --innodb-buffer-page-lru --innodb-sys-columns --innodb-sys-fields --innodb-sys-foreign --innodb-sys-foreign-cols --innodb-sys-indexes --innodb-sys-tables --innodb-sys-virtual --core-file --loose-debug-sync-timeout=300
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stepan 8434 1 1 19:46 pts/2 00:00:01 /home/stepan/mariadb/10.3/sql/mysqld --defaults-group-suffix=.3 --defaults-file=/home/stepan/mariadb/10.3/mysql-test/var/my.cnf --log-output=file --innodb --innodb-cmpmem --innodb-cmp-per-index --innodb-trx --innodb-locks --innodb-lock-waits --innodb-metrics --innodb-buffer-pool-stats --innodb-buffer-page --innodb-buffer-page-lru --innodb-sys-columns --innodb-sys-fields --innodb-sys-foreign --innodb-sys-foreign-cols --innodb-sys-indexes --innodb-sys-tables --innodb-sys-virtual --core-file --loose-debug-sync-timeout=300
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And the ports are used:
$ sudo netstat -tulpn | grep mysqld
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tcp 0 0 0.0.0.0:16009 0.0.0.0:* LISTEN 198749/mysqld
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tcp 0 0 127.0.0.1:16000 0.0.0.0:* LISTEN 198747/mysqld
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tcp 0 0 127.0.0.1:16001 0.0.0.0:* LISTEN 198748/mysqld
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tcp 0 0 127.0.0.1:16002 0.0.0.0:* LISTEN 198749/mysqld
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tcp 0 0 0.0.0.0:16003 0.0.0.0:* LISTEN 198747/mysqld
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tcp 0 0 0.0.0.0:16006 0.0.0.0:* LISTEN 198748/mysqld
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2. Copy [mysqld.3] group from var/my.cnf (attached my.cnf ) into separate configuration file: mysqld.3.cnf (attached mysqld.3.cnf), and make following edits:
2.1. Edit:
wsrep_cluster_address='gcomm://127.0.0.1:16003,127.0.0.1:16006,127.0.0.1:16009'
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wsrep_provider=<path to galera 4 library>
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basedir=<10.4 source tree>
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character-sets-dir=<10.4 source tree>/sql/share/charsets
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lc-messages-dir=<10.4 source tree>/sql/share/
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2.2. And add there also:
binlog-format=row
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wsrep_sst_method=rsync
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innodb-autoinc-lock-mode=2
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3.1 Load some data.
3.2. Stop data loading.
4. Upgrade node 3.
4.1 Stop the Server:
/home/stepan/mariadb/10.3/client/mysqladmin -u root shutdown -S /home/stepan/mariadb/10.3/mysql-test/var/tmp/mysqld.3.sock
4.2. Make sure that wsrep-on is off:
sudo vi /home/stepan/mariadb/10.3/mysql-test/var/mysqld.3.cnf
#wsrep-on=1
4.3. Run 10.4 binaries with 10.3 data:
/home/stepan/mariadb/10.4/sql/mysqld --defaults-file=/home/stepan/mariadb/10.3/mysql-test/var/mysqld.3.cnf --wsrep_provider=none
4.4. Run mysql_upgrade:
/home/stepan/mariadb/10.4/client/mysql_upgrade --defaults-file=/home/stepan/mariadb/10.3/mysql-test/var/mysqld.3.cnf -uroot -h0 -P16002
Actual result:
Phase 1/7: Checking and upgrading mysql database
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Processing databases
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mysql
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mysql.column_stats OK
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mysql.columns_priv OK
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mysql.db OK
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mysql.event OK
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mysql.func OK
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mysql.gtid_slave_pos OK
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mysql.help_category OK
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mysql.help_keyword OK
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mysql.help_relation OK
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mysql.help_topic OK
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mysql.host OK
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mysql.index_stats OK
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mysql.innodb_index_stats OK
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mysql.innodb_table_stats OK
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mysql.plugin OK
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mysql.proc OK
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mysql.procs_priv OK
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mysql.proxies_priv OK
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mysql.roles_mapping OK
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mysql.servers OK
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mysql.table_stats OK
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mysql.tables_priv OK
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mysql.time_zone OK
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mysql.time_zone_leap_second OK
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mysql.time_zone_name OK
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mysql.time_zone_transition OK
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mysql.time_zone_transition_type OK
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mysql.transaction_registry OK
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mysql.user OK
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Phase 2/7: Installing used storage engines... Skipped
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Phase 3/7: Fixing views
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Phase 4/7: Running 'mysql_fix_privilege_tables'
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Phase 5/7: Fixing table and database names
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Phase 6/7: Checking and upgrading tables
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Processing databases
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information_schema
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mtr
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mtr.global_suppressions OK
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mtr.test_suppressions OK
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performance_schema
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test
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test.t OK
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Phase 7/7: Running 'FLUSH PRIVILEGES'
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OK
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4.5. Stop the Server:
/home/stepan/mariadb/10.3/client/mysqladmin -u root shutdown -S /home/stepan/mariadb/10.3/mysql-test/var/tmp/mysqld.3.sock
4.6. export PATH=$PATH:/home/stepan/mariadb/10.4/scripts
5. Check upgraded node 3 without the cluster.
5.1. Start the server:
/home/stepan/mariadb/10.4/sql/mysqld --defaults-file=/home/stepan/mariadb/10.3/mysql-test/var/mysqld.3.cnf
5.2. Start the client:
/home/stepan/mariadb/10.3/client/mysql -u root -S /home/stepan/mariadb/10.3/mysql-test/var/tmp/mysqld.3.sock
Actual result:
Server version: 10.4.3-MariaDB-debug-log Source distribution
5.3. Stop the Server:
/home/stepan/mariadb/10.3/client/mysqladmin -u root shutdown -S /home/stepan/mariadb/10.3/mysql-test/var/tmp/mysqld.3.sock
6. Try to join node 3 back to the cluster.
6.1. Add to /home/stepan/mariadb/10.3/mysql-test/var/mysqld.3.cnf:
6.2. Start the server:
/home/stepan/mariadb/10.4/sql/mysqld --defaults-file=/home/stepan/mariadb/10.3/mysql-test/var/mysqld.3.cnf
Actual results:
Upgraded node 3 has stopped:
ps -ef | grep mysqld
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stepan 198747 1 0 12:21 pts/2 00:00:23 /home/stepan/mariadb/10.3/sql/mysqld --defaults-group-suffix=.1 --defaults-file=/home/stepan/mariadb/10.3/mysql-test/var/my.cnf --log-output=file --innodb --innodb-cmpmem --innodb-cmp-per-index --innodb-trx --innodb-locks --innodb-lock-waits --innodb-metrics --innodb-buffer-pool-stats --innodb-buffer-page --innodb-buffer-page-lru --innodb-sys-columns --innodb-sys-fields --innodb-sys-foreign --innodb-sys-foreign-cols --innodb-sys-indexes --innodb-sys-tables --innodb-sys-virtual --core-file --loose-debug-sync-timeout=300
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stepan 198748 1 0 12:21 pts/2 00:00:23 /home/stepan/mariadb/10.3/sql/mysqld --defaults-group-suffix=.2 --defaults-file=/home/stepan/mariadb/10.3/mysql-test/var/my.cnf --log-output=file --innodb --innodb-cmpmem --innodb-cmp-per-index --innodb-trx --innodb-locks --innodb-lock-waits --innodb-metrics --innodb-buffer-pool-stats --innodb-buffer-page --innodb-buffer-page-lru --innodb-sys-columns --innodb-sys-fields --innodb-sys-foreign --innodb-sys-foreign-cols --innodb-sys-indexes --innodb-sys-tables --innodb-sys-virtual --core-file --loose-debug-sync-timeout=300
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stepan 233635 200752 0 14:44 pts/5 00:00:00 grep --color=auto mysqld
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[stepan@cnt7glr11 10.4]$ sudo netstat -tulpn | grep mysqld
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tcp 0 0 127.0.0.1:16000 0.0.0.0:* LISTEN 198747/mysqld
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tcp 0 0 127.0.0.1:16001 0.0.0.0:* LISTEN 198748/mysqld
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tcp 0 0 0.0.0.0:16003 0.0.0.0:* LISTEN 198747/mysqld
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tcp 0 0 0.0.0.0:16006 0.0.0.0:* LISTEN 198748/mysqld
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mysqld.3.err (attached Node3_join_mysqld.3.err):
2019-02-18 14:44:43 0 [Note] /home/stepan/mariadb/10.4/sql/mysqld: ready for connections.
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Version: '10.4.3-MariaDB-debug-log' socket: '/home/stepan/mariadb/10.3/mysql-test/var/tmp/mysqld.3.sock' port: 16002 Source distribution
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mysqld: galera/src/monitor.hpp:219: void galera::Monitor<C>::self_cancel(C&) [with C = galera::ReplicatorSMM::ApplyOrder]: Assertion `obj_seqno > last_left_' failed.
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190218 14:44:43 [ERROR] mysqld got signal 6 ;
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7. Restart the node 3.
/home/stepan/mariadb/10.4/sql/mysqld --defaults-file=/home/stepan/mariadb/10.3/mysql-test/var/mysqld.3.cnf
Actual result:
The node 1 and 2 have stopped:
mysqld.2.err (attached Node3_restart_mysqld.2.err):
2019-02-18 15:16:05 1 [Note] WSREP: New cluster view: global state: 7e61d751-2fa7-11e9-87ba-63ada45808dc:397, view# 7: Primary, number of nodes: 3, my index: 0, protocol version 3
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2019-02-18 15:16:05 1 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
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2019-02-18 15:16:05 1 [Note] WSREP: REPL Protocols: 9 (4, 2)
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2019-02-18 15:16:05 1 [Note] WSREP: Assign initial position for certification: 397, protocol version: 4
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2019-02-18 15:16:05 0 [Note] WSREP: Service thread queue flushed.
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mysqld: gcs/src/gcs_group.cpp:1186: int gcs_group_find_donor(const gcs_group_t*, int, int, const char*, int, const gu_uuid_t*, gcs_seqno_t): Assertion `ist_seqno != GCS_SEQNO_ILL' failed.
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190218 15:16:05 [ERROR] mysqld got signal 6 ;
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Expected:
Upgraded node 3 successfully continue to operate being joined to the cluster with not yet upgraded nodes.
Other logs and config files are also attached.
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Node3_join_mysqld.1.err