[jira] [Comment Edited] (HDFS-11885) createEncryptionZone should not block on initializing EDEK cache

["Rushabh S Shah (JIRA)" <ji...@apache.org>]

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

Rushabh S Shah edited comment on HDFS-11885 at 5/26/17 7:41 PM:
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We have an internal patch for namenode throwing retriable exception instead of making a synchronous call to kms in case of cache miss.
I can post the same patch if you don't mind.


was (Author: shahrs87):
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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