Details
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Bug
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Status: Resolved
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Minor
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Resolution: Fixed
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2.6.0
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None
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Reviewed
Description
When DNS failed for a time, all MapReduce jobs which completed during that time got failed. Log as below:
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)