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  1. MariaDB Server
  2. MDEV-8959

change master to master_use_gtid= purges relay log and fetchs binlog from master

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Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Duplicate
    • 10.0.21
    • N/A
    • Replication
    • None

    Description

      when STOP SLAVE; CHANGE MASTER TO MASTER_USE_GTID=

      {slave_pos|current_pos}

      ; START SLAVE is used, the relay logs are purged and refetched from the master. In this case, or when the gtid_slave_pos is advanced, the relay logs will contain all the transactions required to continue.

      As I discovered when doing when a replication delay exceeded expire_log_days of the master was that I was left in a state with no relay logs and a master file:position that wasn't able to be fetched.

      An ideal implementation would examine to see at what point the existing relay logs can be used to continue replication.

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        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-4698 With GTID replication, relay logs cannot be relied upon while purging binary logs on master

          • Critical - Crashes, loss of data, severe memory leak.
          • Stalled

          Task - A task that needs to be done. MDEV-8945 Avoid overloading the master NIC on restarting IO_THREAD on lagging slave.

          • Major - Major loss of function.
          • Closed

          Activity

            People

              knielsen Kristian Nielsen
              danblack Daniel Black
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              Dates

                Created:
                Updated:
                Resolved: