SaintBacchus created SPARK-8688:
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Summary: Hadoop Configuration has to disable client cache when
writing or reading delegation tokens.
Key: SPARK-8688
URL: https://issues.apache.org/jira/browse/SPARK-8688
Project: Spark
Issue Type: Bug
Components: YARN
Affects Versions: 1.5.0
Reporter: SaintBacchus
In class *AMDelegationTokenRenewer* and *ExecutorDelegationTokenUpdater*, Spark
will write and read the credentials.
But if we don't disable the *fs.hdfs.impl.disable.cache*, Spark will use cached
FileSystem (which will use old token ) to upload or download file.
Then when the old token is expired, it can't gain the auth to get/put the hdfs.
(I only tested in a very short time with the configuration:
dfs.namenode.delegation.token.renew-interval=3min
dfs.namenode.delegation.token.max-lifetime=10min
I'm not sure whatever it matters.
)
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