[jira] [Created] (AMBARI-17946) Initial Upgrade Checks Can Fail With ConcurrentModificationException

["Jonathan Hurley (JIRA)" <ji...@apache.org>]

Jonathan Hurley created AMBARI-17946:
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             Summary: Initial Upgrade Checks Can Fail With ConcurrentModificationException
                 Key: AMBARI-17946
                 URL: https://issues.apache.org/jira/browse/AMBARI-17946
             Project: Ambari
          Issue Type: Bug
          Components: ambari-server
    Affects Versions: 2.2.0
            Reporter: Jonathan Hurley
            Assignee: Jonathan Hurley
            Priority: Critical
             Fix For: 2.4.0


Intermittently, the pre-stack upgrade checks will fail with a {{ConcurrentModificationException}}:

{code}
 WARNING: A HTTP GET method, public javax.ws.rs.core.Response org.apache.ambari.server.api.services.PreUpgradeCheckService.getPreUpgradeChecks(java.lang.String,javax.ws.rs.core.HttpHeaders,javax.ws.rs.core.UriInfo), should not consume any entity.
27 Jul 2016 04:21:27,035 ERROR [ambari-client-thread-35] CheckHelper:120 - Check HOSTS_MASTER_MAINTENANCE failed
java.util.ConcurrentModificationException
	at java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:711)
	at java.util.LinkedHashMap$LinkedValueIterator.next(LinkedHashMap.java:739)
	at org.apache.ambari.server.checks.HostsMasterMaintenanceCheck.perform(HostsMasterMaintenanceCheck.java:83)
	at org.apache.ambari.server.state.CheckHelper.performChecks(CheckHelper.java:99)
	at org.apache.ambari.server.controller.internal.PreUpgradeCheckResourceProvider.getResources(PreUpgradeCheckResourceProvider.java:192)
	at org.apache.ambari.server.controller.internal.ClusterControllerImpl$ExtendedResourceProviderWrapper.queryForResources(ClusterControllerImpl.java:966)
	at org.apache.ambari.server.controller.internal.ClusterControllerImpl.getResources(ClusterControllerImpl.java:141)
{code}




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