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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7717) Move handling of concurrent client fail-overs to RetryInvocationHandler
Date Thu, 06 Oct 2011 01:06:29 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13121645#comment-13121645
] 

Hudson commented on HADOOP-7717:
--------------------------------

Integrated in Hadoop-Hdfs-trunk-Commit #1102 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk-Commit/1102/])
    HADOOP-7717. Move handling of concurrent client fail-overs to RetryInvocationHandler (atm)

atm : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1179483
Files : 
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/retry/RetryInvocationHandler.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/retry/TestFailoverProxy.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/retry/UnreliableImplementation.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/retry/UnreliableInterface.java

                
> Move handling of concurrent client fail-overs to RetryInvocationHandler
> -----------------------------------------------------------------------
>
>                 Key: HADOOP-7717
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7717
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: ipc
>    Affects Versions: 0.24.0
>            Reporter: Aaron T. Myers
>            Assignee: Aaron T. Myers
>             Fix For: 0.24.0
>
>         Attachments: HADOOP-7717.patch, HADOOP-7717.patch
>
>
> Currently every implementation of a {{FailoverProxyProvider}} will need to perform its
own synchronization to ensure that multiple concurrent failed calls to a single client proxy
object don't result in multiple client fail over events. It would be better to put this logic
in {{RetryInvocationHandler.invoke}}.
> This is based on feedback provided by Todd in [this comment|https://issues.apache.org/jira/browse/HDFS-1973?focusedCommentId=13119567&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13119567].

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