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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7259) Unresponseive NFS mount point due to deferred COMMIT response
Date Fri, 17 Oct 2014 21:03:33 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7259?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14175529#comment-14175529
] 

Hadoop QA commented on HDFS-7259:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12675571/HDFS-7259.001.patch
  against trunk revision 209b169.

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

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {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:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-common-project/hadoop-nfs
hadoop-hdfs-project/hadoop-hdfs-nfs:

                  org.apache.hadoop.hdfs.nfs.nfs3.TestWrites

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

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/8443//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/8443//console

This message is automatically generated.

> Unresponseive NFS mount point due to deferred COMMIT response
> -------------------------------------------------------------
>
>                 Key: HDFS-7259
>                 URL: https://issues.apache.org/jira/browse/HDFS-7259
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: nfs
>    Affects Versions: 2.2.0
>            Reporter: Brandon Li
>            Assignee: Brandon Li
>         Attachments: HDFS-7259.001.patch
>
>
> Since the gateway can't commit random write, it caches the COMMIT requests in a queue
and send back response only when the data can be committed or stream timeout (failure in the
latter case). This could cause problems two patterns:
> (1) file uploading failure 
> (2) the mount dir is stuck on the same client, but other NFS clients can still access
NFS gateway.
> The error pattern (2) is because there are too many COMMIT requests pending, so the NFS
client can't send any other requests(e.g., for "ls") to NFS gateway with its pending requests
limit.



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