Yu Zhang created HDFS-17540:
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Summary: Namenode retry to warmup EDEK cache forever
Key: HDFS-17540
URL: https://issues.apache.org/jira/browse/HDFS-17540
Project: Hadoop HDFS
Issue Type: Bug
Components: encryption, namenode
Affects Versions: 2.8.0
Reporter: Yu Zhang
https://issues.apache.org/jira/browse/HDFS-9405 adds a background thread to
pre-warm EDEK cache.
However this fails and retries continuously if key retrieval fails for one
encryption zone. In our usecase, we have temporarily removed keys for certain
encryption zones. Currently namenode and kms log is filled up with errors
related to background thread retrying warmup for ever .
The pre-warm thread should
* Continue to refresh other encryption zones even if it fails for one
* Should retry only if it fails for all encryption zones, which will be the
case when kms is down.
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