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  1. MariaDB Server
  2. MDEV-21563

FTS thread aborts during shutdown




      This was original opened against Columnstore using build 1.2.5. CS Eng reported it was a crash in InnoDB. May need to be an MDEV ticket. So opening this ticket from MCOL-3740.

      Customer reporting that everytime they do a systemShutdown, the mysqld_safe and mysql still show to be running after shutdown is completed.

      I worked with them to just try running the below commands to see what happens when nothing else of going on, and it still crashed

      /usr/local/mariadb/columnstore/mysql/mysql-Columnstore start
      /usr/local/mariadb/columnstore/mysql/mysql-Columnstore stop
      /usr/local/mariadb/columnstore/mysql/mysql-Columnstore status

      Log files always shows the same thing,

      Event Scheduler: Purging the queue. 21 events
      200123 13:48:41 [ERROR] mysqld got signal 11 ;
      /usr/local/mariadb/columnstore/mysql//bin/mysqld (initiated by: unknown): Normal shutdown
      2020-01-23 13:48:41 0 [Note] Event Scheduler: Killing the scheduler thread, thread id 6
      2020-01-23 13:48:41 0 [Note] Event Scheduler: Waiting for the scheduler thread to reply
      2020-01-23 13:48:41 0 [Note] Event Scheduler: Stopped
      2020-01-23 13:48:41 0 [Note] Event Scheduler: Purging the queue. 21 events
      200123 13:48:41 [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: 10.3.16-MariaDB-log
      It is possible that mysqld could use up to
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 537414652 K bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
      Thread pointer: 0x0
      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 = 0x0 thread_stack 0x80000
      btr/btr0cur.cc:1375(btr_cur_search_to_nth_level_func(dict_index_t*, unsigned long, dtuple_t const*, page_cur_mode_t, unsigned long, btr_cur_t*, rw_lock_t*, char const*, unsigned int, mtr_t*, unsigned long))[0x55b20c9631ae]
      row/row0sel.cc:1681(row_sel(sel_node_t*, que_thr_t*))[0x55b20c96b17b]
      fts/fts0sql.cc:221(fts_eval_sql(trx_t*, que_fork_t*))[0x55b20ca8f5f4]
      fts/fts0fts.cc:2684(fts_cmp_set_sync_doc_id(dict_table_t const*, unsigned long, unsigned long, unsigned long*))[0x55b20ca8f8dc]
      fts/fts0fts.cc:4391(fts_sync(fts_sync_t*, bool, bool, bool) [clone .part.105])[0x55b20ca96942]
      fts/fts0opt.cc:2782(fts_optimize_sync_table(unsigned long))[0x55b20ca9c785]
      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.
      Writing a core file...
      Working directory at /usr/local/mariadb/columnstore/mysql/db
      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 0 unlimited bytes
      Max resident set unlimited unlimited bytes
      Max processes 982518 982518 processes
      Max open files 65535 65535 files
      Max locked memory 65536 65536 bytes
      Max address space unlimited unlimited bytes
      Max file locks unlimited unlimited locks
      Max pending signals 982518 982518 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: core

      From customer

      There are 21 events in the mysql.event table that are enabled

      i tried turning off event scheduler but that didn't help still crashed on shutdown


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              thiru Thirunarayanan Balathandayuthapani
              hill David Hill (Inactive)
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