WCI Collaboration Notification Emails Stop After java.util.ConcurrentModificationException (Doc ID 965464.1)

Last updated on DECEMBER 02, 2016

Applies to:

Oracle WebCenter Collaboration - Version 4.1.2 to 4.2.1
Information in this document applies to any platform.
***Checked for relevance on 22-Nov-2013***

Symptoms

The Notification Service suddenly stops sending emails to users subscribed to Collaboration events.  The Notification wrapper.log shows the error blow just after the issue:

java.util.ConcurrentModificationException

Below is an example stack trace for 'Document Creation Event':

java.util.ConcurrentModificationException
  at java.util.HashMap$HashIterator.nextEntry(HashMap.java:782)
  at java.util.HashMap$EntryIterator.next(HashMap.java:824)
  at java.util.HashMap.putAllForCreate(HashMap.java:424)
  at java.util.HashMap.clone(HashMap.java:656)
  at com.plumtree.collaboration.messaging.notification.messages.DocumentCreationNotification.clone(DocumentCreationNotification.java:118)

Cause

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