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https://issues.apache.org/jira/browse/HDFS-13603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17849470#comment-17849470
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ASF GitHub Bot commented on HDFS-13603:
---------------------------------------
yzhang559 commented on code in PR #6774:
URL: https://github.com/apache/hadoop/pull/6774#discussion_r1614786495
##########
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirEncryptionZoneOp.java:
##########
@@ -537,12 +537,12 @@ static boolean isInAnEZ(final FSDirectory fsd, final
INodesInPath iip)
* then launch up a separate thread to warm them up.
*/
static void warmUpEdekCache(final ExecutorService executor,
- final FSDirectory fsd, final int delay, final int interval) {
+ final FSDirectory fsd, final int delay, final int interval, final int
maxRetries) {
Review Comment:
add the javadoc
> 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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