Stephen O'Donnell created HDDS-2448:
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Summary: Delete container command should used a thread pool
Key: HDDS-2448
URL: https://issues.apache.org/jira/browse/HDDS-2448
Project: Hadoop Distributed Data Store
Issue Type: Improvement
Components: Ozone Datanode
Affects Versions: 0.5.0
Reporter: Stephen O'Donnell
Assignee: Stephen O'Donnell
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 container 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 deleteContainer
command, in a similar way to ReplicateContainerCommand.
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