Forum Discussion

allaboutunix's avatar
10 years ago

concurrency violation

Hi Team, This alert came in my environment in one of the AIX server 6.1 of concurrency violation.     Subject: VCS SevereError for Service Group sapgtsprd, Service group concurrency viola...
  • mikebounds's avatar
    10 years ago

    Most service groups are of type failover (the default) meaning it should only run on one system at any one time and it can fail over to another system, so if VCS detects a failover group is running on more than one node then it reports a Concurrency Violation and then tries to offline on the node that VCS did not online it on.

    So in your situation resource App_saposcol in group sapgtsprd was onlined on mapibm625 outside of VCS control when it was already online on another system in the cluster so VCS offlined it:

    2014/12/03 06:46:55 VCS NOTICE V-16-1-10167 Initiating manual offline of group sapgtsprd on system mapibm625

    If group should run on 2 systems at the same time then you should configure group as Parallel (set group attribute Parallel = 1) and then group will run on all systems in the cluster at the same time.

     

    Mike

  • Gaurav_S's avatar
    10 years ago

    Mike has perfectly pointed the cause , To add to what Mike said, if application has to run on more than 1 node, you need to enable parallel attribute. However the application should have intelligence to run on multiple nodes at the same time without causing issues to data because multiple application instances may access same database underneath which may cause issues to DB,

     

    G