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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2346) DataNode should have timeout on socket writes.
Date Wed, 06 Feb 2008 18:45:08 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12566264#action_12566264
] 

Raghu Angadi commented on HADOOP-2346:
--------------------------------------

Given the above issues, this is probably not a 0.16.1 jira. I would like to implement these
with single selector if there are no better alternatives. But it might not be suitable for
0.16.1.


> DataNode should have timeout on socket writes.
> ----------------------------------------------
>
>                 Key: HADOOP-2346
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2346
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.15.1
>            Reporter: Raghu Angadi
>            Assignee: Raghu Angadi
>             Fix For: 0.16.1
>
>         Attachments: HADOOP-2346.patch, HADOOP-2346.patch, HADOOP-2346.patch, HADOOP-2346.patch
>
>
> If a client opens a file and stops reading in the middle, DataNode thread writing the
data could be stuck forever. For DataNode sockets we set read timeout but not write timeout.
I think we should add a write(data, timeout) method in IOUtils that assumes it the underlying
FileChannel is non-blocking.

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