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From "Aaron T. Myers (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2678) HA: When a FailoverProxyProvider is used, DFSClient should not retry connection ten times before failing over
Date Sat, 17 Dec 2011 01:08:30 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2678?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aaron T. Myers updated HDFS-2678:
---------------------------------

    Attachment: HDFS-2678.patch

Here's a patch which addresses the issue. No tests are included since the patch is pretty
trivial. I tested this manually by starting up a pair of HA NNs and confirmed that no connection
retries occur, only failover retries.
                
> HA: When a FailoverProxyProvider is used, DFSClient should not retry connection ten times
before failing over
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-2678
>                 URL: https://issues.apache.org/jira/browse/HDFS-2678
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, hdfs client
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Aaron T. Myers
>            Assignee: Aaron T. Myers
>         Attachments: HDFS-2678.patch
>
>
> Even though the {{FailoverOnNetworkExceptionRetry}} retry policy tries to fail over immediately,
in the event the active is down, o.a.h.ipc.Client (below the RetryPolicy) will retry the initial
connection 10 times before bubbling up this exception to the RetryPolicy. This should be much
quicker.

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