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  1. MariaDB Server
  2. MDEV-37424

main.connect fails sporadically with a diff in max_used_connections

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Details

    • Bug
    • Status: Confirmed (View Workflow)
    • Major
    • Resolution: Unresolved
    • 12.1.1
    • 12.1
    • Server, Tests
    • None
    • Not for Release Notes

    Description

      Started to fail on buildbot rather often in 12.1 (see https://buildbot.mariadb.net/ci/reports/cross_reference#branch=&revision=&platform=&fail_name=main.connect&fail_variant=&fail_info_full=max_used_connections&typ=&info=&dt=&limit=100&fail_info_short= )

      Also sporadically fails on appveyor

      Typical output ( here, taken from https://buildbot.mariadb.org/#/builders/831/builds/4828/steps/6/logs/stdio)

      Revision hash: e02f4d7e311e214ea62ff2e59599849e229f4165]
       
      main.connect                             w1 [ fail ]
              Test ended at 2025-08-07 21:42:21
       
      CURRENT_TEST: main.connect
      --- /home/buildbot/aarch64-fedora-41/build/mysql-test/main/connect.result	2025-08-07 21:29:34.000000000 +0000
      +++ /home/buildbot/aarch64-fedora-41/build/mysql-test/main/connect.reject	2025-08-07 21:42:21.013778463 +0000
      @@ -287,7 +287,7 @@
       
       SHOW STATUS LIKE 'max_used_connections';
       Variable_name	Value
      -Max_used_connections	1
      +Max_used_connections	2
       
       # -- Starting Event Scheduler...
       SET GLOBAL event_scheduler = ON;
      @@ -299,7 +299,7 @@
       # -- Check that max_used_connections hasn't changed.
       SHOW STATUS LIKE 'max_used_connections';
       Variable_name	Value
      -Max_used_connections	2
      +Max_used_connections	3
       
       # -- Closing new connection...
       disconnect con_1;
       
      Result content mismatch
       
       - saving '/home/buildbot/aarch64-fedora-41/build/mysql-test/var/1/log/main.connect/' to '/home/buildbot/aarch64-fedora-41/build/mysql-test/var/log/main.connect/'
       
      Retrying test main.connect, attempt(2/3)...
      

      There is a hint that it is caused by MDEV-35617. It failed twice like this on bb-12.1-MDEV-35617-drop-user) , before it started failing in 12.1 and main

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              serg Sergei Golubchik
              wlad Vladislav Vaintroub
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                Created:
                Updated:

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