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Harsh J commented on MAPREDUCE-6213: ------------------------------------ +1 for the change. Committing shortly. Thanks Peng! > NullPointerException caused by job history server addr not resolvable > --------------------------------------------------------------------- > > Key: MAPREDUCE-6213 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-6213 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: applicationmaster > Affects Versions: 2.6.0 > Reporter: Peng Zhang > Assignee: Peng Zhang > Priority: Minor > Attachments: MAPREDUCE-6213.patch > > > When DNS failed for a time, all MapReduce jobs which completed during that > time got failed. Log as below: > {noformat} > 2015-01-08 01:26:44,968 ERROR [Thread-856] > org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator: Exception while > unregistering > java.lang.NullPointerException > at > org.apache.hadoop.mapreduce.v2.util.MRWebAppUtil.getApplicationWebURLOnJHSWithoutScheme(MRWebAppUtil.java:135) > at > org.apache.hadoop.mapreduce.v2.util.MRWebAppUtil.getApplicationWebURLOnJHSWithScheme(MRWebAppUtil.java:150) > at > org.apache.hadoop.mapreduce.v2.app.rm.RMCommunicator.doUnregistration(RMCommunicator.java:212) > at > org.apache.hadoop.mapreduce.v2.app.rm.RMCommunicator.unregister(RMCommunicator.java:182) > at > org.apache.hadoop.mapreduce.v2.app.rm.RMCommunicator.serviceStop(RMCommunicator.java:255) > at > org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator.serviceStop(RMContainerAllocator.java:257) > at > org.apache.hadoop.service.AbstractService.stop(AbstractService.java:221) > at > org.apache.hadoop.service.ServiceOperations.stop(ServiceOperations.java:52) > at > org.apache.hadoop.mapreduce.v2.app.MRAppMaster$ContainerAllocatorRouter.serviceStop(MRAppMaster.java:823) > at > org.apache.hadoop.service.AbstractService.stop(AbstractService.java:221) > at > org.apache.hadoop.service.ServiceOperations.stop(ServiceOperations.java:52) > at > org.apache.hadoop.service.ServiceOperations.stopQuietly(ServiceOperations.java:80) > at > org.apache.hadoop.service.CompositeService.stop(CompositeService.java:157) > at > org.apache.hadoop.service.CompositeService.serviceStop(CompositeService.java:131) > at > org.apache.hadoop.mapreduce.v2.app.MRAppMaster.serviceStop(MRAppMaster.java:1471) > at > org.apache.hadoop.service.AbstractService.stop(AbstractService.java:221) > at > org.apache.hadoop.mapreduce.v2.app.MRAppMaster.stop(MRAppMaster.java:1085) > at > org.apache.hadoop.mapreduce.v2.app.MRAppMaster.shutDownJob(MRAppMaster.java:554) > at > org.apache.hadoop.mapreduce.v2.app.MRAppMaster$JobFinishEventHandler$1.run(MRAppMaster.java:605) > {noformat} -- This message was sent by Atlassian JIRA (v6.3.4#6332)