Daryn Sharp created HDFS-4805:
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Summary: Webhdfs client is fragile to token renewal errors
Key: HDFS-4805
URL: https://issues.apache.org/jira/browse/HDFS-4805
Project: Hadoop HDFS
Issue Type: Bug
Components: webhdfs
Affects Versions: 2.0.0-alpha, 0.23.0, 3.0.0
Reporter: Daryn Sharp
Assignee: Daryn Sharp
Priority: Critical
Webhdfs internally acquires a token that will be used for DN-based operations.
The token renewer in common will try to renew that token. If a renewal fails
for any reason, it will try to get another token. If that fails, it gives up
and the token webhdfs holds will soon expire.
A transient network outage or a restart of the NN may cause webhdfs to be left
holding an expired token, effectively rendering webhdfs useless. This is fatal
for daemons.
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