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}
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