Mukul Kumar Singh created HDDS-230:
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Summary: Ozone Datanode exits during data write through Ratis
Key: HDDS-230
URL: https://issues.apache.org/jira/browse/HDDS-230
Project: Hadoop Distributed Data Store
Issue Type: Bug
Components: Ozone Datanode
Affects Versions: 0.2.1
Reporter: Mukul Kumar Singh
Assignee: Mukul Kumar Singh
Fix For: 0.2.1
Ozone datanode exits during data write with the following exception.
{code}
2018-07-05 14:10:01,605 INFO org.apache.ratis.server.storage.RaftLogWorker:
Rolling segment:40356aa1-741f-499c-aad1-b500f2620a3d_9858-RaftLogWorker index
to:4565
2018-07-05 14:10:01,607 ERROR org.apache.ratis.server.impl.StateMachineUpdater:
Terminating with exit status 2:
StateMachineUpdater-40356aa1-741f-499c-aad1-b500f2620a3d_9858: the
StateMachineUpdater hits Throwable
java.lang.NullPointerException
at
org.apache.hadoop.ozone.container.common.transport.server.ratis.ContainerStateMachine.applyTransaction(ContainerStateMachine.java:272)
at
org.apache.ratis.server.impl.RaftServerImpl.applyLogToStateMachine(RaftServerImpl.java:1058)
at
org.apache.ratis.server.impl.StateMachineUpdater.run(StateMachineUpdater.java:154)
at java.lang.Thread.run(Thread.java:745)
{code}
This might be as a result of a ratis transaction which was not written through
the "writeStateMachineData" phase, however it was added to the raft log. This
implied that stateMachineUpdater now applies a transaction without the
corresponding entry being added to the stateMachine.
I am raising this jira to track the issue and will also raise a Ratis jira if
required.
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