Uploaded image for project: 'MariaDB MaxScale'
  1. MariaDB MaxScale
  2. MXS-3416

causal_reads=global returns an unexpected OK packet

    XMLWordPrintable

    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.5.8
    • Fix Version/s: 2.5.9
    • Component/s: readwritesplit
    • Labels:
      None

      Description

      The OK packet returned by the MASTER_GTID_WAIT() call that causal_reads executes is not always removed.

      This was reported along with a network trace and from it can be seen that the same query sometimes returns an OK packet with the more results follow flag set. Theoretically this could be a bug in the server but the simplest explanation is that under some conditions MaxScale fails to properly process the result.

      I have yet to reproduce this with a similar setup and a script that repeatedly executes a query that returns a known row that has replicated to the server.

        Attachments

          Activity

            People

            Assignee:
            markus makela markus makela
            Reporter:
            markus makela markus makela
            Votes:
            0 Vote for this issue
            Watchers:
            2 Start watching this issue

              Dates

              Created:
              Updated:
              Resolved: