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https://issues.apache.org/jira/browse/HDDS-2449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lokesh Jain updated HDDS-2449:
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Target Version/s: 0.7.0 (was: 0.6.0)
> Delete block command should use a thread pool
> ---------------------------------------------
>
> Key: HDDS-2449
> URL: https://issues.apache.org/jira/browse/HDDS-2449
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Components: Ozone Datanode
> Affects Versions: 0.6.0
> Reporter: Stephen O'Donnell
> Assignee: Stephen O'Donnell
> Priority: Major
> Labels: TriagePending
>
> The datanode receives commands over the heartbeat and queues all commands on
> a single queue in StateContext.commandQueue. Inside DatanodeStateMachine a
> single thread is used to process this queue (started by initCommandHander
> thread) and it passes each command to a ‘handler’. Each command type has its
> own handler.
> The delete block command immediately executes the command on the thread used
> to process the command queue. Therefore if the delete is slow for some reason
> (it must access disk, so this is possible) it could cause other commands to
> backup.
> This should be changed to use a threadpool to queue the deleteBlock command,
> in a similar way to ReplicateContainerCommand.
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