Ivan Andika created RATIS-1921:
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             Summary: Close shared worker group in WorkerGroupGetter
                 Key: RATIS-1921
                 URL: https://issues.apache.org/jira/browse/RATIS-1921
             Project: Ratis
          Issue Type: Sub-task
            Reporter: Ivan Andika
            Assignee: Ivan Andika


I was benchmarking Ozone streaming pipeline using `ozone freon ockg`. However, 
the benchmark would not end although all the keys have been written. 

Using Arthas, found that non-daemon threads like 
"NettyClientStreamRpc-workerGroup–thread1" are still running even after the 
benchmark has finished. 

It seems that when hdds.ratis.raft.netty.dataStream.client.worker-group.share 
is set to true, it will create a worker group that will be shared. However, it 
seems that this worker group will never be closed.



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