Kihwal Lee created HDFS-4786:
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Summary: WebHdfsFileSystem hangs on close()
Key: HDFS-4786
URL: https://issues.apache.org/jira/browse/HDFS-4786
Project: Hadoop HDFS
Issue Type: Bug
Components: webhdfs
Affects Versions: 2.0.4-alpha
Reporter: Kihwal Lee
When close() is called via fs shoutdown hook, the synchronized method,
removeRenewAction() hangs. This is because DelegationTokenRenewer calls
DelayQueue.take() inside a synchronized block. Since this is a blocking call,
it hangs forever.
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