TestOakSyncTokenService.testTwoNodesOneLeaving failed on jenkins, again

Regression

org.apache.sling.discovery.commons.providers.spi.base.TestOakSyncTokenService.testTwoNodesOneLeaving

Error Message

expected:<0> but was:<1>

Stacktrace

java.lang.AssertionError: expected:<0> but was:<1>
	at org.junit.Assert.fail(Assert.java:74)
	at org.junit.Assert.failNotEquals(Assert.java:448)
	at org.junit.Assert.assertEquals(Assert.java:102)
	at org.junit.Assert.assertEquals(Assert.java:323)
	at org.junit.Assert.assertEquals(Assert.java:319)
	at org.apache.sling.discovery.commons.providers.spi.base.TestOakSyncTokenService.testTwoNodesOneLeaving(TestOakSyncTokenService.java:168)

Standard Output

04.11.2015 11:36:56.864 *INFO * [main] IndexUpdate: Found a new index node [reference]. Reindexing is requested
04.11.2015 11:36:56.864 *WARN * [main] IndexUpdate: Missing index provider of type [reference], requesting reindex on [/oak:index/reference]
04.11.2015 11:36:57.001 *INFO * [main] IdMapService: registerEventHandler: bundleContext is null - cannot register
04.11.2015 11:36:57.001 *INFO * [main] IdMapService: init: init failed: java.lang.Exception: No Descriptor value available
04.11.2015 11:36:57.001 *INFO * [main] IdMapService: backgroundCheck: spawning background-thread for 'IdMapService-initializer'
04.11.2015 11:36:57.002 *INFO * [main] OakBacklogClusterSyncService: activate: activated with slingId=5575618b-440a-4370-a27c-3223017bc528
04.11.2015 11:36:57.002 *INFO * [main] ViewStateManagerImpl: handleNewViewNonDelayed: ClusterSyncService set - invoking...
04.11.2015 11:36:57.002 *INFO * [main] ViewStateManagerImpl: handleNewViewNonDelayed: invoking waitForAsyncEvents, then clusterSyncService (modCnt=3)
04.11.2015 11:36:57.002 *INFO * [Discovery-AsyncEventSender] AsyncEventSender: AsyncEventSender.run: started.
04.11.2015 11:36:57.002 *INFO * [Discovery-AsyncEventSender] ViewStateManagerImpl: handleNewViewNonDelayed/waitForAsyncEvents.run: done, now invoking consistencyService (modCnt=3)
04.11.2015 11:36:57.002 *INFO * [Discovery-AsyncEventSender] OakBacklogClusterSyncService: sync: doing wait-for-backlog part for view=DefaultTopologyView[current=true, num=2, instances=a905fe58-aa7e-4861-bc9e-3d742746b270[local=false,leader=false],5575618b-440a-4370-a27c-3223017bc528[local=true,leader=true]]
04.11.2015 11:36:57.003 *INFO * [Discovery-AsyncEventSender] OakBacklogClusterSyncService: waitWhileBacklog: could not initialize...
04.11.2015 11:36:57.003 *INFO * [main] IdMapService: registerEventHandler: bundleContext is null - cannot register
04.11.2015 11:36:57.005 *INFO * [Discovery-AsyncEventSender] OakBacklogClusterSyncService: backgroundCheck: spawning background-thread for 'OakBacklogClusterSyncService-backlog-waiting'
04.11.2015 11:36:57.005 *INFO * [main] IdMapService: init: init failed: java.lang.Exception: No Descriptor value available
04.11.2015 11:36:57.005 *INFO * [main] IdMapService: backgroundCheck: spawning background-thread for 'IdMapService-initializer'
04.11.2015 11:36:57.008 *INFO * [IdMapService-initializer] IdMapService: init: added the following mapping: slingId=5575618b-440a-4370-a27c-3223017bc528 to discovery-lite id=1
04.11.2015 11:36:57.010 *INFO * [main] OakBacklogClusterSyncService: activate: activated with slingId=a905fe58-aa7e-4861-bc9e-3d742746b270
04.11.2015 11:36:57.011 *INFO * [OakBacklogClusterSyncService-backlog-waiting] IdMapService: toSlingId: mapping for 1 to 5575618b-440a-4370-a27c-3223017bc528 was newly added.
04.11.2015 11:36:57.011 *INFO * [OakBacklogClusterSyncService-backlog-waiting] OakBacklogClusterSyncService: getBacklogStatus: no backlog (anymore)
04.11.2015 11:36:57.011 *INFO * [OakBacklogClusterSyncService-backlog-waiting] OakBacklogClusterSyncService: waitWhileBacklog: no backlog (anymore), done.
04.11.2015 11:36:57.014 *INFO * [OakBacklogClusterSyncService-backlog-waiting] ViewStateManagerImpl: consistencyService.callback.run: invoking doHandleConsistent.
04.11.2015 11:36:57.015 *INFO * [IdMapService-initializer] IdMapService: init: init failed: java.lang.Exception: No Descriptor value available
04.11.2015 11:36:57.015 *INFO * [OakBacklogClusterSyncService-backlog-waiting] ViewStateManagerImpl: enqueueForAll: sending topologyEvent TopologyEvent [type=TOPOLOGY_INIT, oldView=null, newView=DefaultTopologyView[current=true, num=2, instances=a905fe58-aa7e-4861-bc9e-3d742746b270[local=false,leader=false],5575618b-440a-4370-a27c-3223017bc528[local=true,leader=true]]], to all (1) listeners