Wei-Chiu Chuang created HDFS-9612:
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Summary: DistCp worker threads are not terminated after jobs are
done.
Key: HDFS-9612
URL: https://issues.apache.org/jira/browse/HDFS-9612
Project: Hadoop HDFS
Issue Type: Bug
Components: distcp
Affects Versions: 2.8.0
Reporter: Wei-Chiu Chuang
Assignee: Wei-Chiu Chuang
In HADOOP-11827, a producer-consumer style thread pool was introduced to
parallelize the task of listing files/directories.
We have a use case where a distcp job is run during the commit phase of a MR2
job. However, it was found distcp does not terminate ProducerConsumer thread
pools properly. Because threads are not terminated, those MR2 jobs never finish.
In a more typical use case where distcp is run as a standalone job, those
threads are terminated forcefully when the java process is terminated. So these
leaked threads did not become a problem.
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