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From "Rushabh S Shah (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11885) createEncryptionZone should not block on initializing EDEK cache
Date Fri, 26 May 2017 19:40:04 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16026731#comment-16026731
] 

Rushabh S Shah commented on HDFS-11885:
---------------------------------------

We have an internal patch for namenode throwing retriable exception instead of making a synchronous
call to kms in case of cache miss.

> 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
>
> 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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