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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10747) Support configurable retries on SASL connection failures in RPC client.
Date Tue, 24 Jun 2014 17:56:24 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14042443#comment-14042443
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Chris Nauroth commented on HADOOP-10747:
----------------------------------------

I expect production deployments generally won't need to tune this.  I'm mostly interested
in using this in tests.  In HDFS-2856, I'm adding tests for a secured deployment using {{MiniKdc}}.
 I've observed that the tests fail very intermittently during startup of the {{MiniDFSCluster}},
if all of the datanodes attempt to authenticate with the same principal at the same time.
 (This is an intentional feature of Kerberos trying to identify replay attacks, and our retry
loop is supposed to help work around it.)  Increasing the retries would work around this problem.

> Support configurable retries on SASL connection failures in RPC client.
> -----------------------------------------------------------------------
>
>                 Key: HADOOP-10747
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10747
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 3.0.0, 2.4.0
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>
> The RPC client includes a retry loop around SASL connection failures.  Currently, this
is hard-coded to a maximum of 5 retries.  Let's make this configurable.



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