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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3342) SocketTimeoutException in BlockSender.sendChunks could have a better error message
Date Fri, 24 Oct 2014 17:50:35 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14183118#comment-14183118

Hadoop QA commented on HDFS-3342:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision 0942c99.

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-hdfs-project/hadoop-hdfs.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/8521//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/8521//console

This message is automatically generated.

> SocketTimeoutException in BlockSender.sendChunks could have a better error message
> ----------------------------------------------------------------------------------
>                 Key: HDFS-3342
>                 URL: https://issues.apache.org/jira/browse/HDFS-3342
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>    Affects Versions: 2.0.0-alpha
>            Reporter: Todd Lipcon
>            Assignee: Yongjun Zhang
>            Priority: Minor
>              Labels: supportability
>         Attachments: HDFS-3342.001.patch, HDFS-3342.002.patch, HDFS-3342.002.patch, HDFS-3342.003.patch
> Currently, if a client connects to a DN and begins to read a block, but then stops calling
read() for a long period of time, the DN will log a SocketTimeoutException "480000 millis
timeout while waiting for channel to be ready for write." This is because there is no "keepalive"
functionality of any kind. At a minimum, we should improve this error message to be an INFO
level log which just says that the client likely stopped reading, so disconnecting it.

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