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https://issues.apache.org/jira/browse/HDFS-13603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17851218#comment-17851218
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ASF GitHub Bot commented on HDFS-13603:
---------------------------------------
yzhang559 opened a new pull request, #6860:
URL: https://github.com/apache/hadoop/pull/6860
… queues for keys.
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JIRA = [HDFS-13603](https://issues.apache.org/jira/browse/HDFS-13603)
### Description of PR
throw IOException at last if cache warmup fail for any keys, continue to
warmup other keys.
This is the changes in hadoop-common from PR
https://github.com/apache/hadoop/pull/6774
### How was this patch tested?
new unit test is added
```
mvn test -Dtest=TestValueQueue
[INFO] Running org.apache.hadoop.crypto.key.TestValueQueue
[INFO] Tests run: 9, Failures: 0, Errors: 0, Skipped: 0, Time elapsed:
13.077 s - in org.apache.hadoop.crypto.key.TestValueQueue
```
### For code changes:
- [x] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
> Warmup NameNode EDEK thread retries continuously if there's an invalid key
> ---------------------------------------------------------------------------
>
> Key: HDFS-13603
> URL: https://issues.apache.org/jira/browse/HDFS-13603
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: encryption, namenode
> Affects Versions: 2.8.0
> Reporter: Antony Jay
> Priority: Major
> Labels: pull-request-available
>
> 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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