[AMBARI-19259] When Updating An Alert Group a ConcurrentModificationException is Thrown

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.2.0
• Fix Version/s: 2.5.0
• Component/s: ambari-server
• Assignee: Jonathan Hurley
• Reporter: Jonathan Hurley
• Created: 20/Dec/16 20:16
• Updated: 20/Dec/16 23:24
• Resolved: 20/Dec/16 21:52

Description

When editing an alert group which has targets via the UI, sometimes the following is seen:

16 Nov 2016 11:09:49,343  WARN [qtp-ambari-client-510524] ServletHandler:563 - /api/v1/clusters/EHIHADOOP03/alert_groups/155
java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429)
	at java.util.HashMap$KeyIterator.next(HashMap.java:1453)
	at org.eclipse.persistence.indirection.IndirectSet$1.next(IndirectSet.java:471)
	at org.apache.ambari.server.orm.entities.AlertGroupEntity.setAlertTargets(AlertGroupEntity.java:313)
	at org.apache.ambari.server.controller.internal.AlertGroupResourceProvider.updateAlertGroups(AlertGroupResourceProvider.java:344)
	at org.apache.ambari.server.controller.internal.AlertGroupResourceProvider.access$100(AlertGroupResourceProvider.java:60)
	at org.apache.ambari.server.controller.internal.AlertGroupResourceProvider$2.invoke(AlertGroupResourceProvider.java:187)
	at org.apache.ambari.server.controller.internal.AlertGroupResourceProvider$2.invoke(AlertGroupResourceProvider.java:184)
	at org.apache.ambari.server.controller.internal.AbstractResourceProvider.invokeWithRetry(AbstractResourceProvider.java:450)
	at org.apache.ambari.server.controller.internal.AbstractResourceProvider.modifyResources(AbstractResourceProvider.java:331)

The in-memory collection is not thread safe.

Issue Links

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