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https://issues.apache.org/jira/browse/HDDS-731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17755146#comment-17755146
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Uma Maheswara Rao G commented on HDDS-731:
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[~erose] or [~adoroszlai] I think we are having UncaughtExceptionhandlers
{code}
stateMachineThread = new ThreadFactoryBuilder()
.setDaemon(true)
.setNameFormat("Datanode State Machine Daemon Thread")
.setUncaughtExceptionHandler((Thread t, Throwable ex) -> {
String message = "Terminate Datanode, encounter uncaught exception"
+ " in Datanode State Machine Thread";
ExitUtils.terminate(1, message, ex, LOG);
})
.build().newThread(startStateMachineTask);
stateMachineThread.start();
{code}
The above patch proposed to attempt stop on hook trigger. This is quite old
issue and I don't think we are seeing issues. Please check if we need to add
stop call on UncaughtException handler. Currently it is calling
ExitUtils.terminate
> Add shutdown hook to shutdown XceiverServerRatis on daemon stop
> ---------------------------------------------------------------
>
> Key: HDDS-731
> URL: https://issues.apache.org/jira/browse/HDDS-731
> Project: Apache Ozone
> Issue Type: Bug
> Components: Ozone Datanode
> Reporter: Mukul Kumar Singh
> Assignee: Mukul Kumar Singh
> Priority: Major
> Attachments: HDDS-731.001.patch
>
>
> Currently on shutting down a Ozone datanode using "ozone --daemon stop
> datanode", the XceiverServerRatis is not shutdown properly. This jira
> proposes to add a shutdownHook to take ratis snapshot on shutdown
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