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https://issues.apache.org/jira/browse/HDDS-230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16567965#comment-16567965
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Mukul Kumar Singh commented on HDDS-230:
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Thanks for the review [~ljain]. I have addressed the review comments in the v4
patch.
For CreateContainer we can resend the original entry as SMLogEntry?
bq. For createContainer, we need to provide the stateMachine data so that it is
then processed as part of writeStateMachineData on the follower.
> ContainerStateMachine should provide readStateMachineData api to read data if
> Containers with required during replication
> -------------------------------------------------------------------------------------------------------------------------
>
> 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
> Priority: Critical
> Fix For: 0.2.1
>
> Attachments: HDDS-230.001.patch, HDDS-230.002.patch,
> HDDS-230.003.patch, HDDS-230.004.patch
>
>
> 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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