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Posted to issues@ozone.apache.org by "Aravindan Vijayan (Jira)" <ji...@apache.org> on 2021/08/26 18:17:00 UTC
[jira] [Resolved] (HDDS-5611) NullPointerException in
ContainerStateMachine during Pipeline Close.
[ https://issues.apache.org/jira/browse/HDDS-5611?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Aravindan Vijayan resolved HDDS-5611.
-------------------------------------
Resolution: Fixed
Github PR merged.
> NullPointerException in ContainerStateMachine during Pipeline Close.
> --------------------------------------------------------------------
>
> Key: HDDS-5611
> URL: https://issues.apache.org/jira/browse/HDDS-5611
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Aswin Shakil Balasubramanian
> Assignee: Aswin Shakil Balasubramanian
> Priority: Major
> Labels: pull-request-available
>
> {code:java}
> 2021-06-22 05:43:07,590 ERROR org.apache.hadoop.ozone.container.common.statemachine.commandhandler.ClosePipelineCommandHandler: Can't close pipeline PipelineID=0bcbc90b-5982-450
> 2-a5d6-ba14a461c307
> java.io.IOException: java.lang.NullPointerException
> at org.apache.hadoop.ozone.container.common.transport.server.ratis.XceiverServerRatis.removeGroup(XceiverServerRatis.java:782)
> at org.apache.hadoop.ozone.container.common.statemachine.commandhandler.ClosePipelineCommandHandler.handle(ClosePipelineCommandHandler.java:74)
> at org.apache.hadoop.ozone.container.common.statemachine.commandhandler.CommandDispatcher.handle(CommandDispatcher.java:99)
> at org.apache.hadoop.ozone.container.common.statemachine.DatanodeStateMachine.lambda$initCommandHandlerThread$2(DatanodeStateMachine.java:497)
> at java.base/java.lang.Thread.run(Thread.java:834)
> Caused by: java.io.IOException: java.lang.NullPointerException
> at org.apache.ratis.util.IOUtils.asIOException(IOUtils.java:54)
> at org.apache.ratis.server.impl.RaftServerImpl.waitForReply(RaftServerImpl.java:862)
> at org.apache.ratis.server.impl.RaftServerProxy.groupManagement(RaftServerProxy.java:432)
> at org.apache.hadoop.ozone.container.common.transport.server.ratis.XceiverServerRatis.removeGroup(XceiverServerRatis.java:780)
> ... 4 more
> Caused by: java.lang.NullPointerException
> at org.apache.hadoop.ozone.container.ozoneimpl.ContainerController.markContainerForClose(ContainerController.java:83)
> at org.apache.hadoop.ozone.container.common.transport.server.ratis.ContainerStateMachine.notifyGroupRemove(ContainerStateMachine.java:883)
> at org.apache.ratis.server.impl.RaftServerImpl.groupRemove(RaftServerImpl.java:362)
> at org.apache.ratis.server.impl.RaftServerProxy.lambda$groupRemoveAsync$14(RaftServerProxy.java:499)
> at java.base/java.util.concurrent.CompletableFuture.uniApplyNow(CompletableFuture.java:680)
> at java.base/java.util.concurrent.CompletableFuture.uniApplyStage(CompletableFuture.java:658)
> at java.base/java.util.concurrent.CompletableFuture.thenApply(CompletableFuture.java:2094)
> at org.apache.ratis.server.impl.RaftServerProxy.groupRemoveAsync(RaftServerProxy.java:498)
> at org.apache.ratis.server.impl.RaftServerProxy.groupManagementAsync(RaftServerProxy.java:452)
> ... 6 more
> {code}
> During pipeline close, we iterate over the list of containers in Ratis snapshot to close them if needed. This will cause an NPE for missing containers. We need to make sure we also look at missing containers, and skip them in this step.
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