Yongjun Zhang created HDFS-6510:
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Summary: WebHdfs clients clears the delegation token on retry (for
HA), thus failing retry requests
Key: HDFS-6510
URL: https://issues.apache.org/jira/browse/HDFS-6510
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 2.4.0
Reporter: Yongjun Zhang
Assignee: Yongjun Zhang
In WebHdfs clients connected to a HA HDFS service, when a failure (that is
inferred as a failover) happens and retry is attempted, the delegation token
previously initialized is cleared. For token based auth, this causes all the
subsequent retries to fail due to auth errors.
See "delegationToken = null" in method WebHdfsFileSystem.resetStateToFailOver.
This issue would not only show up on failover, but happens more commonly when
the first NN specified in the config is not reachable.
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