Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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10.1(EOL)
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None
Description
http://buildbot.askmonty.org/buildbot/builders/p8-rhel6-bintar-debug/builds/53/steps/test/logs/stdio
mysqltest: At line 39: query 'drop table t1' failed: 2013: Lost connection to MySQL server during query
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The result from queries just before the failure was:
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SET GLOBAL innodb_file_format = `Barracuda`;
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SET GLOBAL innodb_file_per_table = ON;
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create table t1(a blob) engine=innodb key_block_size=8;
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create function generate_blob()
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returns varchar(20000)
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begin
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declare x varchar(20000) default '';
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declare i int default 500;
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while i > 0 do
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set x = concat(sha1(i), x);
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set i = i - 1;
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end while;
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return x;
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end //
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insert into t1 select generate_blob();
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truncate t1;
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insert into t1 select generate_blob();
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drop table t1;
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Server [mysqld.1 - pid: 32457, winpid: 32457, exit: 256] failed during test run
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Server log from this test:
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----------SERVER LOG START-----------
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InnoDB: Space 723 offset 5 name test/t1 page_type 12 page_type_name ZBLOB2
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InnoDB: key_version 0 page_compressed 0 page_compressed_encrypted 0 lsn 53111499 compressed_len 64631
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2016-07-13 23:37:47 fff813ff160 InnoDB: Assertion failure in thread 17590059528544 in file fil0fil.ic line 168
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InnoDB: Failing assertion: page_type == 34354 || page_type == 37401 || page_type == 17855 || page_type == 2 || page_type == 3 || page_type == 4 || page_type == 0 || page_type == 5 || page_type == 6 || page_type == 7 || page_type == 8 || page_type == 9 || page_type == 10 || page_type == 11 || page_type == 13
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InnoDB: We intentionally generate a memory trap.
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InnoDB: Submit a detailed bug report to http://bugs.mysql.com.
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InnoDB: If you get repeated assertion failures or crashes, even
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InnoDB: immediately after the mysqld startup, there may be
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InnoDB: corruption in the InnoDB tablespace. Please refer to
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InnoDB: http://dev.mysql.com/doc/refman/5.6/en/forcing-innodb-recovery.html
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InnoDB: about forcing recovery.
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160713 23:37:47 [ERROR] mysqld got signal 6 ;
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This could be because you hit a bug. It is also possible that this binary
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or one of the libraries it was linked against is corrupt, improperly built,
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or misconfigured. This error can also be caused by malfunctioning hardware.
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To report this bug, see https://mariadb.com/kb/en/reporting-bugs
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We will try our best to scrape up some info that will hopefully help
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diagnose the problem, but since we have already crashed,
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something is definitely wrong and this may fail.
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Server version: 10.1.16-MariaDB-debug
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key_buffer_size=1048576
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read_buffer_size=131072
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max_used_connections=1
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max_threads=153
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thread_count=1
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It is possible that mysqld could use up to
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key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 62975 K bytes of memory
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Hope that's ok; if not, decrease some variables in the equation.
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Thread pointer: 0x0x0
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Attempting backtrace. You can use the following information to find out
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where mysqld died. If you see no messages after this, something went
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terribly wrong...
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stack_bottom = 0x0 thread_stack 0x48400
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/home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/mysqld(my_print_stacktrace-0x7e58f0)[0x40b61b00]
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/home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/mysqld(handle_fatal_signal-0xfd4584)[0x402dad54]
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linux-vdso64.so.1(__kernel_sigtramp_rt64+0x0)[0xfff94e90448]
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/opt/at7.0/lib64/power7/libc.so.6(gsignal-0x174cd8)[0xfff945af2f0]
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/opt/at7.0/lib64/power7/libc.so.6(abort-0x173084)[0xfff945b13c4]
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/home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/mysql-test/var/4/plugins/ha_innodb.so(+0x155d8c)[0xfff8cd35d8c]
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/home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/mysql-test/var/4/plugins/ha_innodb.so(+0x168948)[0xfff8cd48948]
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/home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/mysql-test/var/4/plugins/ha_innodb.so(+0x177b0c)[0xfff8cd57b0c]
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/home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/mysql-test/var/4/plugins/ha_innodb.so(+0x1781cc)[0xfff8cd581cc]
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/home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/mysql-test/var/4/plugins/ha_innodb.so(+0x178a6c)[0xfff8cd58a6c]
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:0(00000018.plt_call.dlclose@@GLIBC_2.3)[0xfff8cd58ddc]
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/home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/mysql-test/var/4/plugins/ha_innodb.so(+0x1798bc)[0xfff8cd598bc]
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/home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/mysql-test/var/4/plugins/ha_innodb.so(_Z15buf_flush_batchP10buf_pool_t11buf_flush_tmmP16flush_counters_t-0x3faff4)[0xfff8cd59ce4]
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/home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/mysql-test/var/4/plugins/ha_innodb.so(+0x17a4fc)[0xfff8cd5a4fc]
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/home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/mysql-test/var/4/plugins/ha_innodb.so(+0x17b0f4)[0xfff8cd5b0f4]
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/home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/mysql-test/var/4/plugins/ha_innodb.so(+0x17bf70)[0xfff8cd5bf70]
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/opt/at7.0/lib64/power7/libpthread.so.0(+0xc548)[0xfff94e5c548]
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/opt/at7.0/lib64/power7/libc.so.6(clone-0xa4184)[0xfff94688454]
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The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
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information that should help you find out what is causing the crash.
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Writing a core file
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----------SERVER LOG END-------------
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Program terminated with signal 6, Aborted.
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#0 0x00000fff94e63a40 in .pthread_kill () from /opt/at7.0/lib64/power7/libpthread.so.0
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#0 0x00000fff94e63a40 in .pthread_kill () from /opt/at7.0/lib64/power7/libpthread.so.0
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#1 0x0000000040b61c4c in .my_write_core ()
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#2 0x00000000402db258 in .handle_fatal_signal () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/signal_handler.cc:294
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#3 <signal handler called>
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#4 0x00000fff945af2f0 in .raise () from /opt/at7.0/lib64/power7/libc.so.6
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#5 0x00000fff945b12f4 in .abort () from /opt/at7.0/lib64/power7/libc.so.6
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#6 0x00000fff8cd35d8c in ._ZL22fil_page_type_validatePKh () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/include/fil0fil.ic:154
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#7 0x00000fff8cd48948 in ._Z29buf_page_encrypt_before_writeP10buf_page_tPhm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0buf.cc:6054
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#8 0x00000fff8cd57b0c in ._ZL25buf_flush_write_block_lowP10buf_page_t11buf_flush_tb () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:912
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#9 0x00000fff8cd581cc in ._Z14buf_flush_pageP10buf_pool_tP10buf_page_t11buf_flush_tb () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:1061
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#10 0x00000fff8cd58a6c in ._ZL23buf_flush_try_neighborsmm11buf_flush_tmm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:1269
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#11 0x00000fff8cd58ddc in ._ZL32buf_flush_page_and_try_neighborsP10buf_page_t11buf_flush_tmPm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:1343
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#12 0x00000fff8cd598bc in ._ZL23buf_do_flush_list_batchP10buf_pool_tmm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:1586
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#13 0x00000fff8cd59ce4 in ._Z15buf_flush_batchP10buf_pool_t11buf_flush_tmmP16flush_counters_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:1649
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#14 0x00000fff8cd5a4fc in ._Z14buf_flush_listmmPm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:1844
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#15 0x00000fff8cd5b0f4 in ._ZL27page_cleaner_do_flush_batchmm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:2055
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#16 0x00000fff8cd5bf70 in .buf_flush_page_cleaner_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:2323
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#17 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#18 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 21 (Thread 32475):
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#0 0x00000fff94e10958 in ?? () from /lib64/libaio.so.1
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#1 0x00000fff94e109bc in .io_getevents () from /lib64/libaio.so.1
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#2 0x00000fff8cf0b454 in ._ZL20os_aio_linux_collectP14os_aio_array_tmm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0file.cc:5326
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#3 0x00000fff8cf0b928 in ._Z19os_aio_linux_handlemPP10fil_node_tPPvPm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0file.cc:5478
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#4 0x00000fff8cddfc34 in ._Z12fil_aio_waitm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/fil/fil0fil.cc:6045
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#5 0x00000fff8d024b98 in .io_handler_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/srv/srv0start.cc:515
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#6 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#7 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 20 (Thread 32496):
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#0 0x00000fff94e625a4 in .pthread_cond_timedwait () from /opt/at7.0/lib64/power7/libpthread.so.0
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#1 0x00000fff8cf0e6a4 in ._ZL18os_cond_wait_timedP14pthread_cond_tP15os_fast_mutex_tPK8timespec () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:177
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#2 0x00000fff8cf0f284 in ._Z22os_event_wait_time_lowP8os_eventml () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:705
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#3 0x00000fff8d01dee0 in .srv_error_monitor_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/srv/srv0srv.cc:1973
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#4 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#5 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 19 (Thread 32474):
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#0 0x00000fff94e10958 in ?? () from /lib64/libaio.so.1
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#1 0x00000fff94e109bc in .io_getevents () from /lib64/libaio.so.1
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#2 0x00000fff8cf0b454 in ._ZL20os_aio_linux_collectP14os_aio_array_tmm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0file.cc:5326
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#3 0x00000fff8cf0b928 in ._Z19os_aio_linux_handlemPP10fil_node_tPPvPm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0file.cc:5478
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#4 0x00000fff8cddfc34 in ._Z12fil_aio_waitm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/fil/fil0fil.cc:6045
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#5 0x00000fff8d024b98 in .io_handler_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/srv/srv0start.cc:515
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#6 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#7 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 18 (Thread 32473):
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#0 0x00000fff94e10958 in ?? () from /lib64/libaio.so.1
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#1 0x00000fff94e109bc in .io_getevents () from /lib64/libaio.so.1
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#2 0x00000fff8cf0b454 in ._ZL20os_aio_linux_collectP14os_aio_array_tmm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0file.cc:5326
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#3 0x00000fff8cf0b928 in ._Z19os_aio_linux_handlemPP10fil_node_tPPvPm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0file.cc:5478
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#4 0x00000fff8cddfc34 in ._Z12fil_aio_waitm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/fil/fil0fil.cc:6045
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#5 0x00000fff8d024b98 in .io_handler_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/srv/srv0start.cc:515
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#6 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#7 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 17 (Thread 32497):
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#0 0x00000fff94e625a4 in .pthread_cond_timedwait () from /opt/at7.0/lib64/power7/libpthread.so.0
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#1 0x00000fff8cf0e6a4 in ._ZL18os_cond_wait_timedP14pthread_cond_tP15os_fast_mutex_tPK8timespec () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:177
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#2 0x00000fff8cf0f284 in ._Z22os_event_wait_time_lowP8os_eventml () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:705
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#3 0x00000fff8d01d650 in .srv_monitor_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/srv/srv0srv.cc:1727
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#4 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#5 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 16 (Thread 32472):
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#0 0x00000fff94e10958 in ?? () from /lib64/libaio.so.1
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#1 0x00000fff94e109bc in .io_getevents () from /lib64/libaio.so.1
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#2 0x00000fff8cf0b454 in ._ZL20os_aio_linux_collectP14os_aio_array_tmm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0file.cc:5326
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#3 0x00000fff8cf0b928 in ._Z19os_aio_linux_handlemPP10fil_node_tPPvPm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0file.cc:5478
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#4 0x00000fff8cddfc34 in ._Z12fil_aio_waitm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/fil/fil0fil.cc:6045
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#5 0x00000fff8d024b98 in .io_handler_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/srv/srv0start.cc:515
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#6 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#7 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 15 (Thread 32499):
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#0 0x00000fff94e62130 in .pthread_cond_wait () from /opt/at7.0/lib64/power7/libpthread.so.0
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#1 0x00000fff8cf0e800 in ._ZL12os_cond_waitP14pthread_cond_tP15os_fast_mutex_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:214
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#2 0x00000fff8cf0f050 in ._Z17os_event_wait_lowP8os_eventl () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:592
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#3 0x00000fff8d020598 in ._ZL29srv_purge_coordinator_suspendP10srv_slot_tm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/srv/srv0srv.cc:2848
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#4 0x00000fff8d020c34 in .srv_purge_coordinator_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/srv/srv0srv.cc:2967
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#5 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#6 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 14 (Thread 32471):
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#0 0x00000fff94e10958 in ?? () from /lib64/libaio.so.1
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#1 0x00000fff94e109bc in .io_getevents () from /lib64/libaio.so.1
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#2 0x00000fff8cf0b454 in ._ZL20os_aio_linux_collectP14os_aio_array_tmm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0file.cc:5326
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#3 0x00000fff8cf0b928 in ._Z19os_aio_linux_handlemPP10fil_node_tPPvPm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0file.cc:5478
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#4 0x00000fff8cddfc34 in ._Z12fil_aio_waitm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/fil/fil0fil.cc:6045
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#5 0x00000fff8d024b98 in .io_handler_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/srv/srv0start.cc:515
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#6 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#7 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 13 (Thread 32470):
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#0 0x00000fff94e10958 in ?? () from /lib64/libaio.so.1
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#1 0x00000fff94e109bc in .io_getevents () from /lib64/libaio.so.1
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#2 0x00000fff8cf0b454 in ._ZL20os_aio_linux_collectP14os_aio_array_tmm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0file.cc:5326
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#3 0x00000fff8cf0b928 in ._Z19os_aio_linux_handlemPP10fil_node_tPPvPm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0file.cc:5478
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#4 0x00000fff8cddfc34 in ._Z12fil_aio_waitm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/fil/fil0fil.cc:6045
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#5 0x00000fff8d024b98 in .io_handler_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/srv/srv0start.cc:515
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#6 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#7 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 12 (Thread 32467):
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#0 0x00000fff94e625a4 in .pthread_cond_timedwait () from /opt/at7.0/lib64/power7/libpthread.so.0
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#1 0x0000000040b69228 in .safe_cond_timedwait ()
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#2 0x000000004098a270 in .inline_mysql_cond_timedwait ()
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#3 0x000000004098a91c in .my_service_thread_sleep ()
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#4 0x000000004097adcc in .ma_checkpoint_background ()
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#5 0x0000000040aeef68 in .pfs_spawn_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/perfschema/pfs.cc:1860
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#6 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#7 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 11 (Thread 32466):
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#0 0x00000fff94e625a4 in .pthread_cond_timedwait () from /opt/at7.0/lib64/power7/libpthread.so.0
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#1 0x0000000040b69228 in .safe_cond_timedwait ()
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#2 0x0000000040b6a8e4 in .inline_mysql_cond_timedwait ()
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#3 0x0000000040b6b828 in .timer_handler ()
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#4 0x0000000040aeef68 in .pfs_spawn_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/perfschema/pfs.cc:1860
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#5 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#6 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 10 (Thread 32505):
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#0 0x00000fff94e67f18 in .__libc_sigwait () from /opt/at7.0/lib64/power7/libpthread.so.0
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#1 0x000000003fef2660 in .signal_hand () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/mysqld.cc:3474
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#2 0x0000000040aeef68 in .pfs_spawn_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/perfschema/pfs.cc:1860
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#3 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#4 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 9 (Thread 32504):
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#0 0x00000fff9467bf44 in .__select () at ../sysdeps/unix/syscall-template.S:81
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#1 0x00000fff8cf103bc in ._Z15os_thread_sleepm () from /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/mysql-test/var/4/plugins/ha_innodb.so
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#2 0x00000fff8cd2cb38 in .btr_defragment_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/btr/btr0defragment.cc:758
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#3 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#4 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 8 (Thread 32498):
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#0 0x00000fff9467bf44 in .__select () at ../sysdeps/unix/syscall-template.S:81
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#1 0x00000fff8cf103bc in ._Z15os_thread_sleepm () from /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/mysql-test/var/4/plugins/ha_innodb.so
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#2 0x00000fff8d01f798 in ._ZL16srv_master_sleepv () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/srv/srv0srv.cc:2514
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#3 0x00000fff8d01f964 in .srv_master_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/srv/srv0srv.cc:2558
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#4 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#5 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 7 (Thread 32503):
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#0 0x00000fff94e625a4 in .pthread_cond_timedwait () from /opt/at7.0/lib64/power7/libpthread.so.0
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#1 0x00000fff8cf0e6a4 in ._ZL18os_cond_wait_timedP14pthread_cond_tP15os_fast_mutex_tPK8timespec () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:177
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#2 0x00000fff8cf0f284 in ._Z22os_event_wait_time_lowP8os_eventml () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:705
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#3 0x00000fff8d07a6dc in ._Z19ib_wqueue_timedwaitP11ib_wqueue_tl () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/ut/ut0wqueue.cc:154
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#4 0x00000fff8ce2bb04 in ._Z19fts_optimize_threadPv () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/fts/fts0opt.cc:3064
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#5 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#6 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 6 (Thread 32495):
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#0 0x00000fff94e625a4 in .pthread_cond_timedwait () from /opt/at7.0/lib64/power7/libpthread.so.0
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#1 0x00000fff8cf0e6a4 in ._ZL18os_cond_wait_timedP14pthread_cond_tP15os_fast_mutex_tPK8timespec () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:177
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#2 0x00000fff8cf0f284 in ._Z22os_event_wait_time_lowP8os_eventml () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:705
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#3 0x00000fff8ceda3c4 in .lock_wait_timeout_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/lock/lock0wait.cc:536
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#4 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#5 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 5 (Thread 32458):
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#0 0x00000fff94679590 in .__GI___poll () at ../sysdeps/unix/syscall-template.S:81
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#1 0x000000003fef9e34 in ._Z26handle_connections_socketsv () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/mysqld.cc:6523
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#2 0x000000003fef8ab0 in ._Z11mysqld_mainiPPc () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/mysqld.cc:5948
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#3 0x000000003fee97a8 in .main ()
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Thread 4 (Thread 313):
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#0 0x00000fff94e62130 in .pthread_cond_wait () from /opt/at7.0/lib64/power7/libpthread.so.0
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#1 0x00000fff8cf0e800 in ._ZL12os_cond_waitP14pthread_cond_tP15os_fast_mutex_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:214
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#2 0x00000fff8cf0f050 in ._Z17os_event_wait_lowP8os_eventl () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:592
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#3 0x00000fff8d02b82c in ._Z21sync_array_wait_eventP12sync_array_tm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/sync/sync0arr.cc:465
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#4 0x00000fff8d030248 in ._ZL19rw_lock_x_lock_waitP9rw_lock_tmPKcm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/sync/sync0rw.cc:526
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#5 0x00000fff8d0303a8 in ._ZL18rw_lock_x_lock_lowP9rw_lock_tmPKcm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/sync/sync0rw.cc:573
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#6 0x00000fff8d0305fc in ._Z19rw_lock_x_lock_funcP9rw_lock_tmPKcm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/sync/sync0rw.cc:652
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#7 0x00000fff8cd346dc in ._ZL23pfs_rw_lock_x_lock_funcP9rw_lock_tmPKcm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/include/sync0rw.ic:618
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#8 0x00000fff8cd413c4 in ._Z16buf_page_get_genmmmmP11buf_block_tmPKcmP5mtr_tP7dberr_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0buf.cc:3369
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#9 0x00000fff8cd00408 in ._ZL18btr_block_get_funcmmmmPKcmP12dict_index_tP5mtr_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/include/btr0btr.ic:60
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#10 0x00000fff8cd01fc8 in ._ZL20btr_cur_latch_leavesPhmmmmP9btr_cur_tP5mtr_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/btr/btr0cur.cc:257
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#11 0x00000fff8cd03318 in ._Z27btr_cur_search_to_nth_levelP12dict_index_tmPK8dtuple_tmmP9btr_cur_tmPKcmP5mtr_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/btr/btr0cur.cc:739
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#12 0x00000fff8cd1255c in ._ZL31btr_pcur_open_with_no_init_funcP12dict_index_tPK8dtuple_tmmP10btr_pcur_tmPKcmP5mtr_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/include/btr0pcur.ic:486
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#13 0x00000fff8cd1319c in ._Z30btr_pcur_restore_position_funcmP10btr_pcur_tPKcmP5mtr_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/btr/btr0pcur.cc:341
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#14 0x00000fff8d009948 in ._ZL18row_upd_clust_stepP10upd_node_tP9que_thr_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/row/row0upd.cc:2638
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#15 0x00000fff8d009f1c in ._ZL7row_updP10upd_node_tP9que_thr_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/row/row0upd.cc:2814
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#16 0x00000fff8d00a460 in ._Z12row_upd_stepP9que_thr_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/row/row0upd.cc:2966
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#17 0x00000fff8cf54810 in ._ZL12que_thr_stepP9que_thr_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/que/que0que.cc:1061
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#18 0x00000fff8cf54bd4 in ._ZL19que_run_threads_lowP9que_thr_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/que/que0que.cc:1141
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#19 0x00000fff8cf54e0c in ._Z15que_run_threadsP9que_thr_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/que/que0que.cc:1182
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#20 0x00000fff8cf550d4 in ._Z12que_eval_sqlP11pars_info_tPKcmP5trx_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/que/que0que.cc:1259
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#21 0x00000fff8cfb5020 in ._Z24row_drop_table_for_mysqlPKcP5trx_tbmb () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/row/row0mysql.cc:4309
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#22 0x00000fff8ce5dd00 in ._ZN9ha_innodb12delete_tableEPKc () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/handler/ha_innodb.cc:12421
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#23 0x00000000402e9830 in ._ZN7handler15ha_delete_tableEPKc () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/handler.cc:4286
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#24 0x00000000402e2a30 in ._Z15ha_delete_tableP3THDP10handlertonPKcS4_S4_b () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/handler.cc:2351
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#25 0x00000000400e4260 in ._Z23mysql_rm_table_no_locksP3THDP10TABLE_LISTbbbbb () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/sql_table.cc:2468
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#26 0x00000000400e3310 in ._Z14mysql_rm_tableP3THDP10TABLE_LISTcc () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/sql_table.cc:2084
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#27 0x0000000040004268 in ._Z21mysql_execute_commandP3THD () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/sql_parse.cc:4216
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#28 0x000000004000ea38 in ._Z11mysql_parseP3THDPcjP12Parser_state () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/sql_parse.cc:7314
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#29 0x000000003fffbbbc in ._Z16dispatch_command19enum_server_commandP3THDPcj () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/sql_parse.cc:1486
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#30 0x000000003fffa7ac in ._Z10do_commandP3THD () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/sql_parse.cc:1107
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#31 0x000000004017cc34 in ._Z24do_handle_one_connectionP3THD () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/sql_connect.cc:1350
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#32 0x000000004017c894 in .handle_one_connection () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/sql_connect.cc:1262
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#33 0x0000000040aeef68 in .pfs_spawn_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/perfschema/pfs.cc:1860
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#34 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#35 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 3 (Thread 32502):
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#0 0x00000fff94e625a4 in .pthread_cond_timedwait () from /opt/at7.0/lib64/power7/libpthread.so.0
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#1 0x00000fff8cf0e6a4 in ._ZL18os_cond_wait_timedP14pthread_cond_tP15os_fast_mutex_tPK8timespec () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:177
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#2 0x00000fff8cf0f284 in ._Z22os_event_wait_time_lowP8os_eventml () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:705
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#3 0x00000fff8cdc4dfc in .dict_stats_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/dict/dict0stats_bg.cc:545
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#4 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#5 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 2 (Thread 32501):
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#0 0x00000fff94e62130 in .pthread_cond_wait () from /opt/at7.0/lib64/power7/libpthread.so.0
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#1 0x00000fff8cf0e800 in ._ZL12os_cond_waitP14pthread_cond_tP15os_fast_mutex_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:214
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#2 0x00000fff8cf0f050 in ._Z17os_event_wait_lowP8os_eventl () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/os/os0sync.cc:592
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#3 0x00000fff8cd521b4 in .buf_dump_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0dump.cc:703
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#4 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#5 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Thread 1 (Thread 32500):
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#0 0x00000fff94e63a40 in .pthread_kill () from /opt/at7.0/lib64/power7/libpthread.so.0
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#1 0x0000000040b61c4c in .my_write_core ()
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#2 0x00000000402db258 in .handle_fatal_signal () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/sql/signal_handler.cc:294
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#3 <signal handler called>
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#4 0x00000fff945af2f0 in .raise () from /opt/at7.0/lib64/power7/libc.so.6
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#5 0x00000fff945b12f4 in .abort () from /opt/at7.0/lib64/power7/libc.so.6
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#6 0x00000fff8cd35d8c in ._ZL22fil_page_type_validatePKh () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/include/fil0fil.ic:154
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#7 0x00000fff8cd48948 in ._Z29buf_page_encrypt_before_writeP10buf_page_tPhm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0buf.cc:6054
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#8 0x00000fff8cd57b0c in ._ZL25buf_flush_write_block_lowP10buf_page_t11buf_flush_tb () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:912
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#9 0x00000fff8cd581cc in ._Z14buf_flush_pageP10buf_pool_tP10buf_page_t11buf_flush_tb () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:1061
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#10 0x00000fff8cd58a6c in ._ZL23buf_flush_try_neighborsmm11buf_flush_tmm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:1269
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#11 0x00000fff8cd58ddc in ._ZL32buf_flush_page_and_try_neighborsP10buf_page_t11buf_flush_tmPm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:1343
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#12 0x00000fff8cd598bc in ._ZL23buf_do_flush_list_batchP10buf_pool_tmm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:1586
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#13 0x00000fff8cd59ce4 in ._Z15buf_flush_batchP10buf_pool_t11buf_flush_tmmP16flush_counters_t () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:1649
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#14 0x00000fff8cd5a4fc in ._Z14buf_flush_listmmPm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:1844
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#15 0x00000fff8cd5b0f4 in ._ZL27page_cleaner_do_flush_batchmm () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:2055
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#16 0x00000fff8cd5bf70 in .buf_flush_page_cleaner_thread () at /home/buildbot/maria-slave/p8-rhel6-bintar-debug/build/storage/innobase/buf/buf0flu.cc:2323
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#17 0x00000fff94e5c548 in .start_thread () from /opt/at7.0/lib64/power7/libpthread.so.0
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#18 0x00000fff94688454 in .__clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:104
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Cross-reference finds about two dozen occurrences in buildbot, on 10.1 and 10.2, on p8 and Windows, both innodb_plugin and xtradb, starting around November 2015.