[jira] [Created] (HDFS-15545) (S)Webhdfs will not use updated delegation tokens available in the ugi after the old ones expire

["Issac Buenrostro (Jira)" <ji...@apache.org>]

Issac Buenrostro created HDFS-15545:
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             Summary: (S)Webhdfs will not use updated delegation tokens available in the ugi after the old ones expire
                 Key: HDFS-15545
                 URL: https://issues.apache.org/jira/browse/HDFS-15545
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Issac Buenrostro


WebHdfsFileSystem can select a delegation token to use from the current user UGI. The token selection is sticky, and WebHdfsFileSystem will re-use it every time without searching the UGI again.

If the previous token expires, WebHdfsFileSystem will catch the exception and attempt to get a new token. However, the mechanism to get a new token bypasses searching for one on the UGI, so even if there is external logic that has retrieved a new token, it is not possible to make the FileSystem use the new, valid token, rendering the FileSystem object unusable.



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