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  1. CloverDX
  2. CLO-18448

CloverJMX has unsuitable synchronization

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    • OTRS_Ticket_ID:
      208215
    • Sprint:
      Blue Sprint 102, Blue Sprint 103

      Description

      Our customer run into following synchronization issue.

      CloverJMX bean gets information about a job can be released - releaseJob() method. Following method is called to inform other listeners about this event:

      	private void sendReleaseWatchdogNotification(WatchDog watchDog) {
      		synchronized (jobListeners) {
      			for (JobListener jobListener : jobListeners) {
      				jobListener.jobFinished(watchDog);
      			}
      		}
      	}
      

      Unfortunatelly one of the listeners is stuck by a DB connection, which swallows a thread on close() method. From now on, all incomming events about job release are blocked on the jobListeners monitor. It is well visible at FastThread report of attached thread dump:

      Similar issue has been already noticed in an our internal test:
      https://wiki.cloverdx.com/display/DEVELOPMENT/2019-08-22+TES+-+Server+VTE+Stresstest%28s%29+before+release+5-3-1

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              Assignee:
              zatopekm Martin Zatopek
              Reporter:
              zatopekm Martin Zatopek
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