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  1. MariaDB Server
  2. MDEV-4353

multi_source replication conflict between different master connections on global variable relay_log_purge

        Details

        • Type: Bug
        • Status: Closed
        • Priority: Major
        • Resolution: Duplicate
        • Affects Version/s: 10.0.1
        • Fix Version/s: None
        • Component/s: None
        • Labels:

          Description

          In change_master() (sql_repl.cc), there is this code:

            if (need_relay_log_purge)
  {
    relay_log_purge= 1;

          This code is incorrect. The variable relay_log_purge is global, but
          change_master() is per-master-connection.

          This means that if one CHANGE MASTER needs relay log purge, and another CHANGE
          MASTER does not, they will overwrite each other and relay logs will be handled
          incorrectly for at least one of them when the slave threads start.

          There seems to be no code to handle this correctly per-connection.

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                elenst Elena Stepanova added a comment -

                See also MDEV-4117

                Show
                elenst Elena Stepanova added a comment - See also MDEV-4117
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                elenst Elena Stepanova added a comment -

                Shall we close it as a duplicate, or do you think there's something different comparing to MDEV-4117 that's worth keeping open?

                Show
                elenst Elena Stepanova added a comment - Shall we close it as a duplicate, or do you think there's something different comparing to MDEV-4117 that's worth keeping open?

                  People

                  • Assignee:
                    Unassigned
                    Reporter:
                    knielsen Kristian Nielsen
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                    • Created:
                      Updated:
                      Resolved: