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  1. MariaDB Server
  2. MDEV-21281

main.backup_interaction fails intermittently

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      The following intermittent result difference was observed immediately after MDEV-16678 was pushed to 10.5.

      CURRENT_TEST: main.backup_interaction
      --- /usr/share/mysql/mysql-test/main/backup_interaction.result	2019-12-10 14:25:41.000000000 -0500
      +++ /dev/shm/var/4/log/backup_interaction.reject	2019-12-10 16:16:44.997159774 -0500
      @@ -105,6 +105,7 @@
       select lock_mode from information_schema.metadata_lock_info;
       lock_mode
       MDL_BACKUP_START
      +MDL_SHARED
       backup stage block_commit;
       commit;
       backup stage end;
      

      According to the buildbot cross-reference, this is the very first time the failure was observed. There were 2 failures on the very first push:
      http://buildbot.askmonty.org/buildbot/builders/kvm-deb-bionic-ppc64le/builds/2948/steps/mtr/logs/stdio
      http://buildbot.askmonty.org/buildbot/builders/kvm-deb-eoan-amd64/builds/234/steps/mtr/logs/stdio

      I am able to repeat it locally:

      10.5 adb117cf6901a0e0da7577267be1209359892207

      main.backup_interaction 'innodb'         w6 [ 7 fail ]
              Test ended at 2019-12-11 09:15:35
       
      CURRENT_TEST: main.backup_interaction
      --- /mariadb/10.5/mysql-test/main/backup_interaction.result	2019-10-28 17:09:53.002690675 +0200
      +++ /mariadb/10.5/mysql-test/main/backup_interaction.reject	2019-12-11 09:15:35.661386904 +0200
      @@ -105,6 +105,7 @@
       select lock_mode from information_schema.metadata_lock_info;
       lock_mode
       MDL_BACKUP_START
      +MDL_SHARED
       backup stage block_commit;
       commit;
       backup stage end;
      

      This was an optimized ASAN debug build with

      ASAN_OPTIONS=abort_on_error=1 ./mtr --repeat=100 --parallel=auto main.backup_interaction{,,,,,,,,,,,}
      

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              Assignee:
              marko Marko Mäkelä
              Reporter:
              marko Marko Mäkelä
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                Updated:
                Resolved: