Version: '5.7.21-debug-log' socket: '/tmp/mysql_sandbox19822.sock' port: 19822 MySQL Community Server - Debug (GPL) mysqld-debug: /export/home/pb2/build/sb_0-26514852-1514433850.9/mysql-5.7.21/sql/rpl_gtid.h:527: void Checkable_rwlock::assert_some_lock() const: Assertion `get_state() != 0' failed. 08:33:46 UTC - mysqld got signal 6 ; 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. Attempting to collect some information that could help diagnose the problem. As this is a crash and something is definitely wrong, the information collection process might fail. key_buffer_size=8388608 read_buffer_size=131072 max_used_connections=1 max_threads=151 thread_count=1 connection_count=1 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 68200 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. Thread pointer: 0x7f1844000b70 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 = 7f1884198e30 thread_stack 0x40000 /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(my_print_stacktrace+0x35)[0x18dbffa] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(handle_fatal_signal+0x407)[0xed90f0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f18a714c390] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7f18a5ab4428] /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7f18a5ab602a] /lib/x86_64-linux-gnu/libc.so.6(+0x2dbd7)[0x7f18a5aacbd7] /lib/x86_64-linux-gnu/libc.so.6(+0x2dc82)[0x7f18a5aacc82] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(_ZNK16Checkable_rwlock16assert_some_lockEv+0x3b)[0xed02d9] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(_ZN16Checkable_rwlock6unlockEv+0x18)[0xed01d0] /home/gmax/opt/mysql/5.7.21/lib/plugin/group_replication.so(_Z37group_replication_trans_before_commitP11Trans_param+0x4bd)[0x7f1861bb6b5d] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(_ZN14Trans_delegate13before_commitEP3THDbP11st_io_cacheS3_y+0x224)[0x14b6492] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(_ZN13MYSQL_BIN_LOG6commitEP3THDb+0xc06)[0x184c180] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(_Z17trans_commit_stmtP3THD+0x138)[0x1695cb3] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(_Z30acl_end_trans_and_close_tablesP3THDb+0x86)[0xefcde1] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(_Z15change_passwordP3THDPKcS2_Pc+0xaf4)[0x172a0f1] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(_ZN16set_var_password6updateEP3THD+0x3f)[0x14c9007] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(_Z17sql_set_variablesP3THDP4ListI12set_var_baseE+0xeb)[0x14c8543] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(_Z21mysql_execute_commandP3THDb+0x3818)[0x1592d17] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(_Z11mysql_parseP3THDP12Parser_state+0x589)[0x1598606] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(_Z16dispatch_commandP3THDPK8COM_DATA19enum_server_command+0xcc7)[0x158cf88] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(_Z10do_commandP3THD+0x4b3)[0x158bdcd] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(handle_connection+0x1e6)[0x16c2da8] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug(pfs_spawn_thread+0x170)[0x191640c] /lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba)[0x7f18a71426ba] /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f18a5b8641d] Trying to get some variables. Some pointers may be invalid and cause the dump to abort. Query (7f18440055e0): set password='msandbox' Connection ID (thread ID): 2 Status: NOT_KILLED The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains information that should help you find out what is causing the crash. 2018-02-16T08:33:46.515604Z mysqld_safe Number of processes running now: 0 2018-02-16T08:33:46.520494Z mysqld_safe mysqld restarted 2018-02-16T08:33:46.698083Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2018-02-16T08:33:46.698155Z 0 [Note] --secure-file-priv is set to NULL. Operations related to importing and exporting data are disabled 2018-02-16T08:33:46.698185Z 0 [Note] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug (mysqld 5.7.21-debug-log) starting as process 18219 ... 2018-02-16T08:33:46.791620Z 0 [Note] InnoDB: PUNCH HOLE support available 2018-02-16T08:33:46.791714Z 0 [Note] InnoDB: !!!!!!!! UNIV_DEBUG switched on !!!!!!!!! 2018-02-16T08:33:46.791744Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins 2018-02-16T08:33:46.791769Z 0 [Note] InnoDB: Uses event mutexes 2018-02-16T08:33:46.791815Z 0 [Note] InnoDB: GCC builtin __sync_synchronize() is used for memory barrier 2018-02-16T08:33:46.791840Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.3 2018-02-16T08:33:46.791862Z 0 [Note] InnoDB: Using Linux native AIO 2018-02-16T08:33:46.793587Z 0 [Note] InnoDB: Number of pools: 1 2018-02-16T08:33:46.794107Z 0 [Note] InnoDB: Using CPU crc32 instructions 2018-02-16T08:33:46.800625Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M 2018-02-16T08:33:46.876988Z 0 [Note] InnoDB: Completed initialization of buffer pool 2018-02-16T08:33:46.878655Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority(). 2018-02-16T08:33:46.890913Z 0 [Note] InnoDB: Highest supported file format is Barracuda. 2018-02-16T08:33:47.071248Z 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1" 2018-02-16T08:33:47.071264Z 0 [Note] InnoDB: Creating shared tablespace for temporary tables 2018-02-16T08:33:47.071308Z 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ... 2018-02-16T08:33:47.126806Z 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB. 2018-02-16T08:33:47.138370Z 0 [Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active. 2018-02-16T08:33:47.138394Z 0 [Note] InnoDB: 32 non-redo rollback segment(s) are active. 2018-02-16T08:33:47.140707Z 0 [Note] InnoDB: Waiting for purge to start 2018-02-16T08:33:47.191691Z 0 [Note] InnoDB: 5.7.21 started; log sequence number 2551166 2018-02-16T08:33:47.192697Z 0 [Note] InnoDB: Loading buffer pool(s) from /home/gmax/sandboxes/group_msb_5_7_21/node1/data/ib_buffer_pool 2018-02-16T08:33:47.196686Z 0 [Note] Plugin 'FEDERATED' is disabled. 2018-02-16T08:33:47.225553Z 0 [Note] Recovering after a crash using mysql-bin 2018-02-16T08:33:47.225593Z 0 [Note] Starting crash recovery... 2018-02-16T08:33:47.225640Z 0 [Note] Crash recovery finished. 2018-02-16T08:33:47.228786Z 0 [Note] InnoDB: Buffer pool(s) load completed at 180216 9:33:47 2018-02-16T08:33:47.262929Z 0 [Warning] Failed to set up SSL because of the following SSL library error: SSL context is not usable without certificate and private key 2018-02-16T08:33:47.262958Z 0 [Note] Server hostname (bind-address): '127.0.0.1'; port: 19822 2018-02-16T08:33:47.262980Z 0 [Note] - '127.0.0.1' resolves to '127.0.0.1'; 2018-02-16T08:33:47.263012Z 0 [Note] Server socket created on IP: '127.0.0.1'. 2018-02-16T08:33:47.300913Z 0 [Note] Event Scheduler: Loaded 0 events 2018-02-16T08:33:47.301226Z 0 [Note] /home/gmax/opt/mysql/5.7.21/bin/mysqld-debug: ready for connections. Version: '5.7.21-debug-log' socket: '/tmp/mysql_sandbox19822.sock' port: 19822 MySQL Community Server - Debug (GPL)