[HADOOP-12313] NPE in JvmPauseMonitor when calling stop() before start()

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Target Version/s: 2.8.0
• Hadoop Flags: Reviewed
• Release Note: Allow stop() before start() completed in JvmPauseMonitor
• Assignee: Gabor Liptak
• Reporter: Rohith Sharma K S
• Created: 08/Aug/15 03:03
• Updated: 25/Oct/19 20:24
• Resolved: 23/Nov/15 07:10

Description

It is observed that after YARN-4019 some tests are failing in TestRMAdminService with null pointer exceptions in build build failure

unning org.apache.hadoop.yarn.server.resourcemanager.TestRMAdminService
Tests run: 19, Failures: 0, Errors: 2, Skipped: 0, Time elapsed: 11.541 sec <<< FAILURE! - in org.apache.hadoop.yarn.server.resourcemanager.TestRMAdminService
testModifyLabelsOnNodesWithDistributedConfigurationDisabled(org.apache.hadoop.yarn.server.resourcemanager.TestRMAdminService)  Time elapsed: 0.132 sec  <<< ERROR!
java.lang.NullPointerException: null
	at org.apache.hadoop.util.JvmPauseMonitor.stop(JvmPauseMonitor.java:86)
	at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$RMActiveServices.serviceStop(ResourceManager.java:601)
	at org.apache.hadoop.service.AbstractService.stop(AbstractService.java:221)
	at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.stopActiveServices(ResourceManager.java:983)
	at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.transitionToStandby(ResourceManager.java:1038)
	at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceStop(ResourceManager.java:1085)
	at org.apache.hadoop.service.AbstractService.stop(AbstractService.java:221)
	at org.apache.hadoop.service.AbstractService.close(AbstractService.java:250)
	at org.apache.hadoop.yarn.server.resourcemanager.TestRMAdminService.testModifyLabelsOnNodesWithDistributedConfigurationDisabled(TestRMAdminService.java:824)

testRemoveClusterNodeLabelsWithDistributedConfigurationEnabled(org.apache.hadoop.yarn.server.resourcemanager.TestRMAdminService)  Time elapsed: 0.121 sec  <<< ERROR!
java.lang.NullPointerException: null
	at org.apache.hadoop.util.JvmPauseMonitor.stop(JvmPauseMonitor.java:86)
	at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$RMActiveServices.serviceStop(ResourceManager.java:601)
	at org.apache.hadoop.service.AbstractService.stop(AbstractService.java:221)
	at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.stopActiveServices(ResourceManager.java:983)
	at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.transitionToStandby(ResourceManager.java:1038)
	at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceStop(ResourceManager.java:1085)
	at org.apache.hadoop.service.AbstractService.stop(AbstractService.java:221)
	at org.apache.hadoop.service.AbstractService.close(AbstractService.java:250)
	at org.apache.hadoop.yarn.server.resourcemanager.TestRMAdminService.testRemoveClusterNodeLabelsWithDistributedConfigurationEnabled(TestRMAdminService.java:867)

Issue Links

• is related to: YARN-4019 Add JvmPauseMonitor to ResourceManager and NodeManager
• relates to: HADOOP-12321 Make JvmPauseMonitor an AbstractService
• relates to: HADOOP-12320 discuss restart capability for services (JvmPauseMonitor, NodeManager, ResourceManager)