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  1. MariaDB Server
  2. MDEV-20621

FULLTEXT INDEX activity causes InnoDB hang

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      Description

      We are experiencing technical difficulties with the latest MariaDB 10.1.41-MariaDB.
      This is only happening on one server while we have more with the same system package versions.

      The database is freezing and does not accept new connections.
      The error_log shows so much error data eg:

      InnoDB: Warning: a long semaphore wait:
      --Thread 140300680931072 has waited at dict0dict.cc line 984 for 241.00 seconds the semaphore:
      Mutex at 0x7f9e26c112e8 '&dict_sys->mutex', lock var 1
      Last time reserved by thread 140300697716480 in file not yet reserved line 0, waiters flag 1
      InnoDB: Warning: semaphore wait:
      --Thread 140300680931072 has waited at dict0dict.cc line 984 for 241.00 seconds the semaphore:
      Mutex at 0x7f9e26c112e8 '&dict_sys->mutex', lock var 1
      Last time reserved by thread 140300697716480 in file not yet reserved line 0, waiters flag 1
      

      We can provide more error log data but not in a public.

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              Assignee:
              thiru Thirunarayanan Balathandayuthapani
              Reporter:
              Novkovski Stevo
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