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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-2870) Datanode.shutdown() and Namenode.stop() should close all rpc connections
Date Thu, 06 Mar 2008 21:36:58 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-2870?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hairong Kuang updated HADOOP-2870:
----------------------------------

    Attachment: closeConnection2.patch

Thanks, Raghu. The patch removed the top synchronization at stopClient. As the thought of
providing a method to close RetryProxy and then in turn closes the wrapped RPCProxy, I agree
that it is a good idea. I thought about it too. But the problem is that it is hard to make
it general. Thanks for clarifying that it is not a requirement for this patch. :-)

> Datanode.shutdown() and Namenode.stop() should close all rpc connections
> ------------------------------------------------------------------------
>
>                 Key: HADOOP-2870
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2870
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 0.16.0
>            Reporter: Hairong Kuang
>            Assignee: Hairong Kuang
>             Fix For: 0.17.0
>
>         Attachments: closeConnection.patch, closeConnection1.patch, closeConnection2.patch
>
>
> Currently this two cleanup methods do not close all existing rpc connections. If a mini
dfs cluster gets shutdown and then restarted as we do in TestFileCreation, RPCs in second
mini cluster reuse the unclosed connections opened in the first run but there is no server
running to serve the request. So the client get stuck waiting for the response forever if
client side timeout gets removed as suggested by hadoop-2811.

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