Bug #77164 Assertion : mtr_memo_contains(mtr, block, 2) == rw_lock_own(&block->lock, 351)
Submitted: 27 May 2015 5:10 Modified: 27 May 2015 13:21
Reporter: Ramesh Sivaraman (OCA) Email Updates:
Status: Verified Impact on me:
None 
Category:MySQL Server: DML Severity:S3 (Non-critical)
Version:5.6.21, 5.6.26, 5.6.24 OS:Linux (CentOS 7)
Assigned to: CPU Architecture:Any
Tags: debug

[27 May 2015 5:10] Ramesh Sivaraman
Description:
2015-05-27 05:01:58 7f92b4ab2700  InnoDB: Assertion failure in thread 140268073068288 in file fsp0fsp.cc line 1319
InnoDB: Failing assertion: mtr_memo_contains(mtr, block, 2) == rw_lock_own(&block->lock, 351)

** GDB info

#0  0x00007f92b44fb771 in pthread_kill () from /lib64/libpthread.so.0
#1  0x0000000000a954ea in my_write_core (sig=6) at /ssd/ramesh/mysql-server/mysql-5.6/mysys/stacktrace.c:422
#2  0x0000000000726494 in handle_fatal_signal (sig=6) at /ssd/ramesh/mysql-server/mysql-5.6/sql/signal_handler.cc:230
#3  <signal handler called>
#4  0x00007f92b33075c9 in raise () from /lib64/libc.so.6
#5  0x00007f92b3308cd8 in abort () from /lib64/libc.so.6
#6  0x0000000000cf54ec in fsp_page_create (space=0, zip_size=0, page_no=393, mtr=0x7f92b4aae480, init_mtr=0x7f92b4aae480) at /ssd/ramesh/mysql-server/mysql-
5.6/storage/innobase/fsp/fsp0fsp.cc:1318
#7  0x0000000000cf5995 in fsp_alloc_free_page (space=0, zip_size=0, hint=0, mtr=0x7f92b4aae480, init_mtr=0x7f92b4aae480) at /ssd/ramesh/mysql-server/mysql-5
.6/storage/innobase/fsp/fsp0fsp.cc:1453
#8  0x0000000000cf81be in fseg_alloc_free_page_low (space=0, zip_size=0, seg_inode=0x7f92a4aa2df2 "", hint=0, direction=111 'o', mtr=0x7f92b4aae480, init_mt
r=0x7f92b4aae480) at /ssd/ramesh/mysql-server/mysql-5.6/storage/innobase/fsp/fsp0fsp.cc:2505
#9  0x0000000000cf71b5 in fseg_create_general (space=0, page=0, byte_offset=60, has_done_reservation=1, mtr=0x7f92b4aae480) at /ssd/ramesh/mysql-server/mysq
l-5.6/storage/innobase/fsp/fsp0fsp.cc:2107
#10 0x0000000000c2ed4b in trx_undo_seg_create (rseg=0x7f92aefefff8, rseg_hdr=0x7f92a4854026 "\377\377\377\376", type=1, id=0x7f92b4aae428, undo_page=0x7f92b4aae420, mtr=0x7f92b4aae480) at /ssd/ramesh/mysql-server/mysql-5.6/storage/innobase/trx/trx0undo.cc:477
#11 0x0000000000c31200 in trx_undo_create (trx=0x7f9295cc7478, rseg=0x7f92aefefff8, type=1, trx_id=1964, xid=0x7f9295cc7608, undo=0x7f92b4aae958, mtr=0x7f92b4aae480) at /ssd/ramesh/mysql-server/mysql-5.6/storage/innobase/trx/trx0undo.cc:1595
#12 0x0000000000c319d1 in trx_undo_assign_undo (trx=0x7f9295cc7478, type=1) at /ssd/ramesh/mysql-server/mysql-5.6/storage/innobase/trx/trx0undo.cc:1790
#13 0x0000000000c176cd in trx_undo_report_row_operation (flags=0, op_type=1, thr=0x7f9295d5c350, index=0x7f9295c6def8, clust_entry=0x7f9295c6e178, update=0x0, cmpl_info=0, rec=0x0, offsets=0x0, roll_ptr=0x7f92b4aaef40) at /ssd/ramesh/mysql-server/mysql-5.6/storage/innobase/trx/trx0rec.cc:1261
#14 0x0000000000c5de92 in btr_cur_ins_lock_and_undo (flags=0, cursor=0x7f92b4aaf0a0, entry=0x7f9295c6e178, thr=0x7f9295d5c350, mtr=0x7f92b4aaf120, inherit=0x7f92b4aaefb0) at /ssd/ramesh/mysql-server/mysql-5.6/storage/innobase/btr/btr0cur.cc:1173
#15 0x0000000000c5e50d in btr_cur_optimistic_insert (flags=0, cursor=0x7f92b4aaf0a0, offsets=0x7f92b4aaf610, heap=0x7f92b4aaf600, entry=0x7f9295c6e178, rec=0x7f92b4aaf5f8, big_rec=0x7f92b4aaf608, n_ext=0, thr=0x7f9295d5c350, mtr=0x7f92b4aaf120) at /ssd/ramesh/mysql-server/mysql-5.6/storage/innobase/btr/btr0cur.cc:1393
#16 0x0000000000b8d46d in row_ins_clust_index_entry_low (flags=0, mode=2, index=0x7f9295c6def8, n_uniq=0, entry=0x7f9295c6e178, n_ext=0, thr=0x7f9295d5c350) at /ssd/ramesh/mysql-server/mysql-5.6/storage/innobase/row/row0ins.cc:2473
#17 0x0000000000b8e355 in row_ins_clust_index_entry (index=0x7f9295c6def8, entry=0x7f9295c6e178, thr=0x7f9295d5c350, n_ext=0) at /ssd/ramesh/mysql-server/mysql-5.6/storage/innobase/row/row0ins.cc:2867
#18 0x0000000000b8e655 in row_ins_index_entry (index=0x7f9295c6def8, entry=0x7f9295c6e178, thr=0x7f9295d5c350) at /ssd/ramesh/mysql-server/mysql-5.6/storage/innobase/row/row0ins.cc:2965
#19 0x0000000000b8e936 in row_ins_index_entry_step (node=0x7f9295d5c130, thr=0x7f9295d5c350) at /ssd/ramesh/mysql-server/mysql-5.6/storage/innobase/row/row0ins.cc:3042
#20 0x0000000000b8ec3a in row_ins (node=0x7f9295d5c130, thr=0x7f9295d5c350) at /ssd/ramesh/mysql-server/mysql-5.6/storage/innobase/row/row0ins.cc:3182
#21 0x0000000000b8efbf in row_ins_step (thr=0x7f9295d5c350) at /ssd/ramesh/mysql-server/mysql-5.6/storage/innobase/row/row0ins.cc:3307
#22 0x0000000000ba5f66 in row_insert_for_mysql (mysql_rec=0x7f9295c9bad8 "\375A", prebuilt=0x7f9295d5bc78) at /ssd/ramesh/mysql-server/mysql-5.6/storage/innobase/row/row0mysql.cc:1366
#23 0x0000000000ab2d04 in ha_innobase::write_row (this=0x7f9295c9b810, record=0x7f9295c9bad8 "\375A") at /ssd/ramesh/mysql-server/mysql-5.6/storage/innobase/handler/ha_innodb.cc:6635
#24 0x00000000006449e3 in handler::ha_write_row (this=0x7f9295c9b810, buf=0x7f9295c9bad8 "\375A") at /ssd/ramesh/mysql-server/mysql-5.6/sql/handler.cc:7273
#25 0x00000000007b4300 in write_record (thd=0x7f92a3fee000, table=0x7f9295c57a00, info=0x7f92b4aafb00, update=0x7f92b4aafb80) at /ssd/ramesh/mysql-server/mysql-5.6/sql/sql_insert.cc:1921
#26 0x00000000007b2191 in mysql_insert (thd=0x7f92a3fee000, table_list=0x7f9295c1f120, fields=..., values_list=..., update_fields=..., update_values=..., duplic=DUP_ERROR, ignore=false) at /ssd/ramesh/mysql-server/mysql-5.6/sql/sql_insert.cc:1072
#27 0x00000000007d43b7 in mysql_execute_command (thd=0x7f92a3fee000) at /ssd/ramesh/mysql-server/mysql-5.6/sql/sql_parse.cc:3443
#28 0x00000000007dbdbc in mysql_parse (thd=0x7f92a3fee000, rawbuf=0x7f9295c1f010 "insert INTO t1 values(0x41),(0x4120),(0x4100)", length=45, parser_state=0x7f92b4ab0e70) at /ssd/ramesh/mysql-server/mysql-5.6/sql/sql_parse.cc:6245
#29 0x00000000007cf36f in dispatch_command (command=COM_QUERY, thd=0x7f92a3fee000, packet=0x7f929d3e1001 "insert INTO t1 values(0x41),(0x4120),(0x4100)", packet_length=45) at /ssd/ramesh/mysql-server/mysql-5.6/sql/sql_parse.cc:1332
#30 0x00000000007ce45e in do_command (thd=0x7f92a3fee000) at /ssd/ramesh/mysql-server/mysql-5.6/sql/sql_parse.cc:1034
#31 0x0000000000796879 in do_handle_one_connection (thd_arg=0x7f92a3fee000) at /ssd/ramesh/mysql-server/mysql-5.6/sql/sql_connect.cc:982
#32 0x0000000000796362 in handle_one_connection (arg=0x7f92a3fee000) at /ssd/ramesh/mysql-server/mysql-5.6/sql/sql_connect.cc:898
#33 0x0000000000d71288 in pfs_spawn_thread (arg=0x7f92adf38600) at /ssd/ramesh/mysql-server/mysql-5.6/storage/perfschema/pfs.cc:1860
#34 0x00007f92b44f6df3 in start_thread () from /lib64/libpthread.so.0
#35 0x00007f92b33c81ad in clone () from /lib64/libc.so.6

How to repeat:
The attached tarball gives the testcase as an exact match of our system,
including some handy utilities

{epoch}.sql has SQL info.

$ vi {epoch}_mybase # Update base path in this file (the only change
required!). For non-binary distribution please update SOURCE_DIR
location also.
$ ./{epoch}_init # Initializes the data dir
$ ./{epoch}_start # Starts mysqld
$ ./{epoch}_cl # To check mysqld is up
$ ./{epoch}_run # Run the testcase with pquery binary(produces
output)
$ vi /dev/shm/{epoch}/error.log.out # Verify the error log
$ ./{epoch}_gdb # Brings you to a gdb prompt attached to correct
mysqld
& generated core
$ ./{epoch}_parse_core # Create {epoch}_STD.gdb and {epoch}_FULL.gdb;
standard and full var gdb stack traces
etc.
[27 May 2015 5:10] Ramesh Sivaraman
Testcase bundle

Attachment: 1432553395_bug_bundle.tar.gz (application/gzip, text), 1014.63 KiB.

[27 May 2015 13:21] Umesh Shastry
Hello Ramesh,

Thank you for the report and test case.
Observed that only debug build is affected(checked 5.6.26).

Thanks,
Umesh
[27 May 2015 13:22] Umesh Shastry
// 5.6.26 

scripts/mysql_install_db --basedir=/export/umesh/server/binaries/mysql-5.6.26 --datadir=/export/umesh/server/binaries/mysql-5.6.26/77164
bin/mysqld-debug --basedir=/export/umesh/server/binaries/mysql-5.6.26 --datadir=/export/umesh/server/binaries/mysql-5.6.26/77164 --core-file --socket=/tmp/mysql_ushastry.sock  --port=15000 --log-error=/export/umesh/server/binaries/mysql-5.6.26/77164/log.err 2>&1 &

// 
[umshastr@hod03]/export/umesh/server/binaries/mysql-5.6.26: bin/mysql -uroot -S/tmp/mysql_ushastry.sock --force < tests/1432553395.sql
..
ERROR 177 (HY000) at line 34: Too many active concurrent transactions
ERROR 1146 (42S02) at line 35: Table 'test.t' doesn't exist
ERROR 2013 (HY000) at line 36: Lost connection to MySQL server during query

(gdb) bt
#0  0x00007f10a40ed771 in pthread_kill () from /lib64/libpthread.so.0
#1  0x0000000000ae21cf in my_write_core (sig=6) at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/mysys/stacktrace.c:422
#2  0x000000000074643a in handle_fatal_signal (sig=6) at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/sql/signal_handler.cc:230
#3  <signal handler called>
#4  0x00007f10a2cf35c9 in raise () from /lib64/libc.so.6
#5  0x00007f10a2cf4cd8 in abort () from /lib64/libc.so.6
#6  0x0000000000d2bac0 in fseg_inode_get (header=0x7f1081434054 "", space=0, zip_size=0, mtr=0x7f1079984500)
    at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/storage/innobase/fsp/fsp0fsp.cc:1849
#7  0x0000000000d2cf65 in fseg_n_reserved_pages (header=0x7f1081434054 "", used=0x7f1079984430, mtr=0x7f1079984500)
    at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/storage/innobase/fsp/fsp0fsp.cc:2178
#8  0x0000000000c9033b in btr_get_size (index=0x7f104001cdc8, flag=2, mtr=0x7f1079984500)
    at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/storage/innobase/btr/btr0btr.cc:1219
#9  0x0000000000d0ff48 in dict_stats_analyze_index (index=0x7f104001cdc8) at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/storage/innobase/dict/dict0stats.cc:1910
#10 0x0000000000d109da in dict_stats_update_persistent (table=0x7f104005e508) at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/storage/innobase/dict/dict0stats.cc:2209
#11 0x0000000000d12bcf in dict_stats_update (table=0x7f104005e508, stats_upd_option=DICT_STATS_RECALC_PERSISTENT)
    at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/storage/innobase/dict/dict0stats.cc:3127
#12 0x0000000000d12ea8 in dict_stats_update (table=0x7f104005e508, stats_upd_option=DICT_STATS_FETCH_ONLY_IF_NOT_IN_MEMORY)
    at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/storage/innobase/dict/dict0stats.cc:3248
#13 0x0000000000afdd87 in dict_stats_init (table=0x7f104005e508) at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/storage/innobase/include/dict0stats.ic:174
#14 0x0000000000b0cff8 in ha_innobase::open (this=0x7f104002c7a0, name=0x7f104001cbd8 "./test/t1", mode=2, test_if_locked=2)
    at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/storage/innobase/handler/ha_innodb.cc:4859
#15 0x0000000000652d37 in handler::ha_open (this=0x7f104002c7a0, table_arg=0x7f1040029460, name=0x7f104001cbd8 "./test/t1", mode=2, test_if_locked=2)
    at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/sql/handler.cc:2505
#16 0x00000000008c19ef in open_table_from_share (thd=0x3a15850, share=0x7f104001c8b0, alias=0x7f1040017540 "t1", db_stat=39, prgflag=44, ha_open_flags=0, outparam=0x7f1040029460,
    is_create_table=false) at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/sql/table.cc:2355
#17 0x0000000000794367 in open_table (thd=0x3a15850, table_list=0x7f1040017548, ot_ctx=0x7f1079985c30)
    at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/sql/sql_base.cc:3167
#18 0x00000000007951d6 in open_and_process_table (thd=0x3a15850, lex=0x3a17618, tables=0x7f1040017548, counter=0x7f1079985dc8, flags=0, prelocking_strategy=0x7f1079985d30,
    has_prelocking_list=false, ot_ctx=0x7f1079985c30) at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/sql/sql_base.cc:4706
#19 0x00000000007959a4 in open_tables (thd=0x3a15850, start=0x3a17628, counter=0x7f1079985dc8, flags=0, prelocking_strategy=0x7f1079985d30)
    at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/sql/sql_base.cc:5139
#20 0x00000000007d4d74 in open_tables (thd=0x3a15850, tables=0x3a17628, counter=0x7f1079985dc8, flags=0)
    at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/sql/sql_base.h:451
#21 0x000000000086fa2d in mysql_create_table (thd=0x3a15850, create_table=0x7f1040017548, create_info=0x7f1079986610, alter_info=0x7f1079986060)
    at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/sql/sql_table.cc:5068
#22 0x00000000007fc395 in mysql_execute_command (thd=0x3a15850) at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/sql/sql_parse.cc:3068
#23 0x0000000000802a66 in mysql_parse (thd=0x3a15850, rawbuf=0x7f10400173f0 "create TABLE t1(a int,primary key (a),t timestamp,c char(10) default \"hello\",i int)", length=83,
    parser_state=0x7f1079987700) at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/sql/sql_parse.cc:6386
#24 0x000000000080468a in dispatch_command (command=COM_QUERY, thd=0x3a15850, packet=0x3b46281 "create TABLE t1(a int,primary key (a),t timestamp,c char(10) default \"hello\",i int)",
    packet_length=83) at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/sql/sql_parse.cc:1340
#25 0x0000000000805f16 in do_command (thd=0x3a15850) at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/sql/sql_parse.cc:1037
#26 0x00000000007bb949 in do_handle_one_connection (thd_arg=0x3a15850) at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/sql/sql_connect.cc:982
#27 0x00000000007bba0f in handle_one_connection (arg=0x3a15850) at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/sql/sql_connect.cc:898
#28 0x0000000000daf210 in pfs_spawn_thread (arg=0x3abeb80) at /export/home/pb2/build/sb_0-15307164-1431760457.15/mysqlcom-pro-5.6.26/storage/perfschema/pfs.cc:1860
#29 0x00007f10a40e8df3 in start_thread () from /lib64/libpthread.so.0
#30 0x00007f10a2db447d in clone () from /lib64/libc.so.6
(gdb)
[27 May 2015 13:28] Umesh Shastry
// with 5.6.24 debug build, each time getting diff asserts( every time cleaning datadir)

(gdb) bt
#0  0x00007fd5eecfa771 in pthread_kill () from /lib64/libpthread.so.0
#1  0x0000000000ae0f7f in my_write_core (sig=6) at /export/home/pb2/build/sb_0-14808650-1427301633.73/mysqlcom-pro-5.6.24/mysys/stacktrace.c:422
#2  0x0000000000745f8a in handle_fatal_signal (sig=6) at /export/home/pb2/build/sb_0-14808650-1427301633.73/mysqlcom-pro-5.6.24/sql/signal_handler.cc:230
#3  <signal handler called>
#4  0x00007fd5ed9005c9 in raise () from /lib64/libc.so.6
#5  0x00007fd5ed901cd8 in abort () from /lib64/libc.so.6
#6  0x00007fd5ed8f9536 in __assert_fail_base () from /lib64/libc.so.6
#7  0x00007fd5ed8f95e2 in __assert_fail () from /lib64/libc.so.6
#8  0x0000000000b2fead in commit_try_norebuild (ha_alter_info=0x7fd5c45aefa0, ctx=0x7fd58c02cbb0, old_table=0x7fd58c007190, trx=0x7fd58c059f18, table_name=0x7fd58c018b55 "t1")
    at /export/home/pb2/build/sb_0-14808650-1427301633.73/mysqlcom-pro-5.6.24/storage/innobase/handler/handler0alter.cc:5074
#9  0x0000000000b241a9 in ha_innobase::commit_inplace_alter_table (this=0x7fd58c023650, altered_table=0x7fd58c05aea0, ha_alter_info=0x7fd5c45aefa0, commit=true)
    at /export/home/pb2/build/sb_0-14808650-1427301633.73/mysqlcom-pro-5.6.24/storage/innobase/handler/handler0alter.cc:5517
#10 0x000000000065107a in handler::ha_commit_inplace_alter_table (this=0x7fd58c023650, altered_table=0x7fd58c05aea0, ha_alter_info=0x7fd5c45aefa0, commit=true)
    at /export/home/pb2/build/sb_0-14808650-1427301633.73/mysqlcom-pro-5.6.24/sql/handler.cc:4386
#11 0x00000000008696cc in mysql_inplace_alter_table (thd=0x3af5570, table_list=0x7fd58c02be58, table=0x7fd58c007190, altered_table=0x7fd58c05aea0, ha_alter_info=0x7fd5c45aefa0,
    inplace_supported=HA_ALTER_INPLACE_NO_LOCK_AFTER_PREPARE, target_mdl_request=0x7fd5c45af900, alter_ctx=0x7fd5c45ae4f0)
    at /export/home/pb2/build/sb_0-14808650-1427301633.73/mysqlcom-pro-5.6.24/sql/sql_table.cc:6623
#12 0x000000000086b169 in mysql_alter_table (thd=0x3af5570, new_db=0x7fd58c02c3b8 "test", new_name=0x7fd58c02be20 "t1", create_info=0x7fd5c45b0610, table_list=0x7fd58c02be58,
    alter_info=0x7fd5c45b0060, order_num=0, order=0x0, ignore=false) at /export/home/pb2/build/sb_0-14808650-1427301633.73/mysqlcom-pro-5.6.24/sql/sql_table.cc:8447
#13 0x00000000007fbd41 in mysql_execute_command (thd=0x3af5570) at /export/home/pb2/build/sb_0-14808650-1427301633.73/mysqlcom-pro-5.6.24/sql/sql_parse.cc:3118
#14 0x0000000000802212 in mysql_parse (thd=0x3af5570, rawbuf=0x7fd58c02bd70 "CREATE INDEX i ON t1(a)", length=23, parser_state=0x7fd5c45b1700)
    at /export/home/pb2/build/sb_0-14808650-1427301633.73/mysqlcom-pro-5.6.24/sql/sql_parse.cc:6391
#15 0x0000000000803e36 in dispatch_command (command=COM_QUERY, thd=0x3af5570, packet=0x3c25fe1 "CREATE INDEX i ON t1(a)", packet_length=23)
    at /export/home/pb2/build/sb_0-14808650-1427301633.73/mysqlcom-pro-5.6.24/sql/sql_parse.cc:1340
#16 0x00000000008056c0 in do_command (thd=0x3af5570) at /export/home/pb2/build/sb_0-14808650-1427301633.73/mysqlcom-pro-5.6.24/sql/sql_parse.cc:1037
#17 0x00000000007bb221 in do_handle_one_connection (thd_arg=0x3af5570) at /export/home/pb2/build/sb_0-14808650-1427301633.73/mysqlcom-pro-5.6.24/sql/sql_connect.cc:982
#18 0x00000000007bb2e7 in handle_one_connection (arg=0x3af5570) at /export/home/pb2/build/sb_0-14808650-1427301633.73/mysqlcom-pro-5.6.24/sql/sql_connect.cc:898
#19 0x0000000000dd43e0 in pfs_spawn_thread (arg=0x3b9e700) at /export/home/pb2/build/sb_0-14808650-1427301633.73/mysqlcom-pro-5.6.24/storage/perfschema/pfs.cc:1860
#20 0x00007fd5eecf5df3 in start_thread () from /lib64/libpthread.so.0
#21 0x00007fd5ed9c147d in clone () from /lib64/libc.so.6
[27 May 2015 13:29] Umesh Shastry
/ 5.5.45, 5.7.8 debug/release build not affected