3 Replies Latest reply on Jun 19, 2015 6:58 AM by realkobe

    HornetQ Failback does not always work

    realkobe
    realkobe Jun 17, 2015 4:36 AM

      Hi there,

       

      I use hornetq-2.4.0.Final (2.5.0.SNAPSHOT) and I setup 3 servers

      • instance0 as live
      • instance1 as backup
      • instance2 as backup

      I want always instance0 as live when it runs, thus <allow-failback>true</allow-failback> in each hornetq-configuration.xml

      Nevertheless it not always runs that way

       

      commandinstance0instance1instance2
      start instance0livexx
      start instance1livebackupx
      start instance2livebackupwaiting
      stop instance0xlivebackup
      start instance0waitinglivebackup
      stop instance1backupxlive
      some time laterlivexbackup

       

      instance0 logs just before waiting

      10:05:30,753 INFO  [org.hornetq.core.server] HQ221109: HornetQ Backup Server version 2.5.0.SNAPSHOT (Wild Hornet, 124) [null] started, waiting live to fail before it gets active

       

      Why does not instance0 go back as live while instance1 is still running?

       

      Regards

      Stephan

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        • 1. Re: HornetQ Failback does not always work
          ataylor
          ataylor Jun 17, 2015 4:53 AM (in response to realkobe)

          There is an example that does exactly that, take a look at the configurations and start there.

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          • 2. Re: HornetQ Failback does not always work
            realkobe
            realkobe Jun 18, 2015 8:32 AM (in response to ataylor)

            Hi,

             

            I assume you mean the multiple-failover-failback example. I did look at it but did not find any hints. This example uses <allow-failback>true</allow-failback> - just as I do.

             

            I also assume I don't need to set <shared-store>true</shared-store> because I don't want to share the storage.

             

            According the manual (Chapter 39. High Availability and Failover) the setup <failover-on-shutdown>false</failover-on-shutdown> is optional because it stands for another feature: Even on normal shutdown (not a kill) the failover might happen. Nevertheless I set this to true.

             

            Might you please tell me what the important difference is between this configuration and mine?

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            • 3. Re: HornetQ Failback does not always work
              realkobe
              realkobe Jun 19, 2015 6:58 AM (in response to realkobe)

              I figured out why multiple-failover-failback works with live/backup/backup: All of the servers use the same (shared) store. This is no option for me because the servers run on different machines and I must not use shared storage.

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