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Bug 1148723

Summary:	Cache can't start if coordinator leaves during join and joiner becomes the new coordinator
Product:	[JBoss] JBoss Data Grid 6	Reporter:	Dan Berindei <dberinde>
Component:	Infinispan	Assignee:	Tristan Tarrant <ttarrant>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Martin Gencur <mgencur>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	6.4.0	CC:	jdg-bugs, rmacor
Target Milestone:	ER3
Target Release:	6.4.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-01-28 13:26:47 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Dan Berindei 2014-10-02 08:33:56 UTC

When the joiner becomes the coordinator, it tries to recover the current cache topologies, but it receives just one expected member and no current topology. This causes a NPE in ClusterCacheStatus:

22:51:49,547 ERROR (transport-thread-NodeB-p21124-t1:) [ClusterCacheStatus] ISPN000228: Failed to recover cache dist state after the current node became the coordinator
java.lang.NullPointerException
	at org.infinispan.partionhandling.impl.PreferAvailabilityStrategy.onPartitionMerge(PreferAvailabilityStrategy.java:104)
	at org.infinispan.topology.ClusterCacheStatus.doMergePartitions(ClusterCacheStatus.java:452)
	at org.infinispan.topology.ClusterTopologyManagerImpl.recoverClusterStatus(ClusterTopologyManagerImpl.java:260)
	at org.infinispan.topology.ClusterTopologyManagerImpl.handleClusterView(ClusterTopologyManagerImpl.java:180)
	at org.infinispan.topology.ClusterTopologyManagerImpl$ClusterViewListener$1.run(ClusterTopologyManagerImpl.java:427)


The LocalTopologyManagerImpl waits a bit after receiving the SuspectException and tries again, but this time it receives a null initial topology, causing another NPE:

22:51:51,319 DEBUG (testng-GlobalKeySetTaskTest:) [LocalTopologyManagerImpl] Error sending join request for cache dist to coordinator
java.lang.NullPointerException
	at org.infinispan.topology.LocalTopologyManagerImpl.resetLocalTopologyBeforeRebalance(LocalTopologyManagerImpl.java:222)
	at org.infinispan.topology.LocalTopologyManagerImpl.handleTopologyUpdate(LocalTopologyManagerImpl.java:191)
	at org.infinispan.topology.LocalTopologyManagerImpl.join(LocalTopologyManagerImpl.java:105)
	at org.infinispan.statetransfer.StateTransferManagerImpl.start(StateTransferManagerImpl.java:108)

This keeps going on until the state transfer timeout expires.