Kristopher Kane created KNOX-1413:
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Summary: Knox masks WebHDFS 403 errors which are not NameNode HA
or safe mode related
Key: KNOX-1413
URL: https://issues.apache.org/jira/browse/KNOX-1413
Project: Apache Knox
Issue Type: Bug
Components: Server
Affects Versions: 0.12.0
Reporter: Kristopher Kane
Assignee: Kristopher Kane
WebHdfsHaDispatch checks return status for 403 for StandbyException and
SafeModeException and raises context accurate exceptions.
FileAlreadyExistsException is also surfaced from WebHDFS as a 403 but is not
captured explicitly and the error handling falls through to catching
IOException which then conducts failoverRequest as if it is a StandbyException.
The strange thing is 403 with the FileAlreadyExistsException does return some
times. I think this has to do with where the rounds of NN HA failover end up
lying. With a default of three, it can fall on a standby namenode and 500 is
returned. Other times the correct 403 are returned after the default of three
failover attempts.
This was seen on 0.12.0 but master branch code hasn't change enough to alter
this behavior.
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