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From "Rushabh S Shah (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-11804) KMS client needs retry logic
Date Fri, 09 Jun 2017 15:20:18 GMT

     [ https://issues.apache.org/jira/browse/HDFS-11804?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rushabh S Shah updated HDFS-11804:
----------------------------------
    Status: Open  (was: Patch Available)

> KMS client needs retry logic
> ----------------------------
>
>                 Key: HDFS-11804
>                 URL: https://issues.apache.org/jira/browse/HDFS-11804
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.6.0
>            Reporter: Rushabh S Shah
>            Assignee: Rushabh S Shah
>         Attachments: HDFS-11804-trunk-1.patch, HDFS-11804-trunk-2.patch, HDFS-11804-trunk-3.patch,
HDFS-11804-trunk-4.patch, HDFS-11804-trunk.patch
>
>
> The kms client appears to have no retry logic – at all.  It's completely decoupled
from the ipc retry logic.  This has major impacts if the KMS is unreachable for any reason,
including but not limited to network connection issues, timeouts, the +restart during an upgrade+.
> This has some major ramifications:
> # Jobs may fail to submit, although oozie resubmit logic should mask it
> # Non-oozie launchers may experience higher rates if they do not already have retry logic.
> # Tasks reading EZ files will fail, probably be masked by framework reattempts
> # EZ file creation fails after creating a 0-length file – client receives EDEK in
the create response, then fails when decrypting the EDEK
> # Bulk hadoop fs copies, and maybe distcp, will prematurely fail



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