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https://issues.apache.org/jira/browse/HDDS-1555?focusedWorklogId=253689&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-253689
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ASF GitHub Bot logged work on HDDS-1555:
----------------------------------------
Author: ASF GitHub Bot
Created on: 04/Jun/19 11:35
Start Date: 04/Jun/19 11:35
Worklog Time Spent: 10m
Work Description: bshashikant commented on issue #846: HDDS-1555. Disable
install snapshot for ContainerStateMachine.
URL: https://github.com/apache/hadoop/pull/846#issuecomment-498634373
Thanks @swagle for updating the patch. The patch looks good me. I am +1 on
this. Please take care of the checkstyle issues reported.
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Issue Time Tracking
-------------------
Worklog Id: (was: 253689)
Time Spent: 1h 40m (was: 1.5h)
> Disable install snapshot for ContainerStateMachine
> --------------------------------------------------
>
> Key: HDDS-1555
> URL: https://issues.apache.org/jira/browse/HDDS-1555
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: Ozone Datanode
> Affects Versions: 0.3.0
> Reporter: Mukul Kumar Singh
> Assignee: Siddharth Wagle
> Priority: Major
> Labels: MiniOzoneChaosCluster, pull-request-available
> Fix For: 0.5.0
>
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> In case a follower lags behind the leader by a large number, the leader tries
> to send the snapshot to the follower. For ContainerStateMachine, the
> information in the snapshot it not the entire state machine data.
> InstallSnapshot for ContainerStateMachine should be disabled.
> {code}
> 2019-05-19 10:58:22,198 WARN server.GrpcLogAppender
> (GrpcLogAppender.java:installSnapshot(423)) -
> GrpcLogAppender(e3e19760-1340-4acd-b50d-f8a796a97254->28d9bd2f-3fe2-4a69-8120-757a00fa2f20):
> failed to install snapshot
> [/Users/msingh/code/apache/ozone/github/git_oz_bugs_fixes/hadoop-ozone/integration-test/target/test/data/MiniOzoneClusterImpl-c2a863ef-8be9-445c-886f-57cad3a7b12e/datanode-6/data/ratis/fb88b749-3e75-4381-8973-6e0cb4904c7e/sm/snapshot.2_190]:
> {}
> java.lang.NullPointerException
> at
> org.apache.ratis.server.impl.LogAppender.readFileChunk(LogAppender.java:369)
> at
> org.apache.ratis.server.impl.LogAppender.access$1100(LogAppender.java:54)
> at
> org.apache.ratis.server.impl.LogAppender$SnapshotRequestIter$1.next(LogAppender.java:318)
> at
> org.apache.ratis.server.impl.LogAppender$SnapshotRequestIter$1.next(LogAppender.java:303)
> at
> org.apache.ratis.grpc.server.GrpcLogAppender.installSnapshot(GrpcLogAppender.java:412)
> at
> org.apache.ratis.grpc.server.GrpcLogAppender.runAppenderImpl(GrpcLogAppender.java:101)
> at
> org.apache.ratis.server.impl.LogAppender$AppenderDaemon.run(LogAppender.java:80)
> at java.lang.Thread.run(Thread.java:748)
> {code}
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