Erik Krogen created HDFS-14435:
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Summary: ObserverReadProxyProvider is unable to properly fetch
HAState from Standby NNs
Key: HDFS-14435
URL: https://issues.apache.org/jira/browse/HDFS-14435
Project: Hadoop HDFS
Issue Type: Bug
Components: ha, nn
Affects Versions: 3.3.0
Reporter: Erik Krogen
Assignee: Erik Krogen
We have been seeing issues during testing of the Consistent Read from Standby
feature that indicate that ORPP is unable to call {{getHAServiceState}} on
Standby NNs, as they are rejected with a {{StandbyException}}. Upon further
investigation, we realized that although the Standby allows the
{{getHAServiceState()}} call, reading a delegation token is not allowed in
Standby state, thus the call will fail when using DT-based authentication. This
hasn't caused issues in practice, since ORPP assumes that the state is Standby
if it is unable to fetch the state, but we should fix the logic to properly
handle this scenario.
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