Wei-Chiu Chuang created HDDS-12902:
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Summary: ecReconstructReadExecutor should be created as as a daemon
Key: HDDS-12902
URL: https://issues.apache.org/jira/browse/HDDS-12902
Project: Apache Ozone
Issue Type: Bug
Reporter: Wei-Chiu Chuang
ECReconstructionCoordinator has ecReconstructReadExecutor which creates
ThreadPoolExecutor as user-thread, not daemon thread.
It doesn't cause problem today, as this thread is inside DataNode, and DataNode
shuts down when the process shuts down.
In general a ThreadPoolExecutor should either:
(1) be a daemon thread, or
(2) a user-thread, and shut down explicitly when the parent object closes.
It looks like this bad pattern happens in a few other places:
CloseContainerCommandHandler, FinalizationManager,
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