title: jBPM creating duplicate tasks after timer event : Multiple instances running
body: <p>We are providing jBPM services to different applications.</p>
  <p>The service is deployed on multiple pool and multiple instances of the services are running. But recently after updating the Hibernate to 5.1.3+ versions we are getting duplicate tasks.</p>
  <p>For single pool, single instance there are no duplicates getting generated and only the tasks which are after the timer event have duplicate problem. Not always it generated duplicates but mostly.</p>
  <p><a href="https://i.stack.imgur.com/gC5iy.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gC5iy.png" alt="enter image description here" /></a></p>
  <p>Always the Notify Manager is duplicating and assume Remind Sys Admin task is not there.
  In the jBPM cancel/interrupt check box is selected already</p>
  <p>Can someone suggest something to debug or fix?</p>
  <p>I have referred this <a href="https://answers.laserfiche.com/questions/88987/Timer-event-duplicating-tasks" rel="nofollow noreferrer">link</a> but its confusing what they want us to do. Above select/deselect I have already tried.</p>