Uma Maheswara Rao G created HDFS-9141:
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Summary: Thread leak in Datanode#refreshVolumes
Key: HDFS-9141
URL: https://issues.apache.org/jira/browse/HDFS-9141
Project: Hadoop HDFS
Issue Type: Bug
Components: datanode
Affects Versions: 2.7.1, 3.0.0
Reporter: Uma Maheswara Rao G
Assignee: Uma Maheswara Rao G
In refreshVolumes, we are creating executor service and submitting volume
addition tasks to it.
But we are not shutting down the service after the use. Even though we are not
holding instance level service, the initialized thread could be left out.
{code}
ExecutorService service = Executors.newFixedThreadPool(
changedVolumes.newLocations.size());
{code}
So, simple fix for this would be to shutdown the service after its use.
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