zhihai xu created YARN-2816: ------------------------------- Summary: NM fail to start with NPE during container recovery Key: YARN-2816 URL: https://issues.apache.org/jira/browse/YARN-2816 Project: Hadoop YARN Issue Type: Bug Components: nodemanager Affects Versions: 2.5.0 Reporter: zhihai xu Assignee: zhihai xu
NM fail to start with NPE during container recovery. We saw the following crash happen: 2014-10-30 22:22:37,211 INFO org.apache.hadoop.service.AbstractService: Service org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl failed in state INITED; cause: java.lang.NullPointerException java.lang.NullPointerException at org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recoverContainer(ContainerManagerImpl.java:289) at org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover(ContainerManagerImpl.java:252) at org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.serviceInit(ContainerManagerImpl.java:235) at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163) at org.apache.hadoop.service.CompositeService.serviceInit(CompositeService.java:107) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceInit(NodeManager.java:250) at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:445) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:492) The reason is some DB files used in NMLeveldbStateStoreService are accidentally deleted to save disk space at /tmp/hadoop-yarn/yarn-nm-recovery/yarn-nm-state. This leaves some incomplete container record which don't have CONTAINER_REQUEST_KEY_SUFFIX(startRequest) entry in the DB. When container is recovered at ContainerManagerImpl#recoverContainer, The NullPointerException at the following code cause NM shutdown. {code} StartContainerRequest req = rcs.getStartRequest(); ContainerLaunchContext launchContext = req.getContainerLaunchContext(); {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)