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https://issues.apache.org/jira/browse/HDFS-11885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16032172#comment-16032172
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Rushabh S Shah commented on HDFS-11885:
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bq. The patch applies almost cleanly in branch-2.8 but compilation is failing
with the following error.
This is because the {{javac.version}} is 1.7 in branch-2.8 and 1.8 in trunk.
In 1.8, java automatically casts {{java.lang.Object}} to whatever the method
expects.
There are couple of options.
1. Have a different patch for branch-2.8
2. Change the trunk patch to explicitly type casts to whatever the method
expects.
I would prefer option#2 since that way there would be minimum difference
between branch-2.8 and trunk. But I will leave it upto you.
> createEncryptionZone should not block on initializing EDEK cache
> ----------------------------------------------------------------
>
> Key: HDFS-11885
> URL: https://issues.apache.org/jira/browse/HDFS-11885
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: encryption
> Affects Versions: 2.6.5
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Priority: Critical
> Attachments: HDFS-11885.001.patch, HDFS-11885.002.patch
>
>
> When creating an encryption zone, we call {{ensureKeyIsInitialized}}, which
> calls {{provider.warmUpEncryptedKeys(keyName)}}. This is a blocking call,
> which attempts to fill the key cache up to the low watermark.
> If the KMS is down or slow, this can take a very long time, and cause the
> createZone RPC to fail with a timeout.
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