[jira] [Commented] (HDFS-7733) NFS: readdir/readdirplus return null directory attribute on failure

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-7733?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14304487#comment-14304487 ] 

Hadoop QA commented on HDFS-7733:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12696346/HDFS-7733.01.patch
  against trunk revision b73e776.

    {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 tests.
                        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-nfs.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/9424//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/9424//console

This message is automatically generated.

> NFS: readdir/readdirplus return null directory attribute on failure
> -------------------------------------------------------------------
>
>                 Key: HDFS-7733
>                 URL: https://issues.apache.org/jira/browse/HDFS-7733
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: nfs
>    Affects Versions: 2.6.0
>            Reporter: Arpit Agarwal
>            Assignee: Arpit Agarwal
>         Attachments: HDFS-7733.01.patch
>
>
> NFS readdir and readdirplus operations return a null directory attribute on some failure paths. This causes clients to get a 'Stale file handle' error which can only be fixed by unmounting and remounting the share.
> The issue can be reproduced by running 'ls' against a large directory which is being actively modified, triggering the 'cookie mismatch' failure path.
> {code}
>         } else {
>           LOG.error("cookieverf mismatch. request cookieverf: " + cookieVerf
>               + " dir cookieverf: " + dirStatus.getModificationTime());
>           return new READDIRPLUS3Response(Nfs3Status.NFS3ERR_BAD_COOKIE);
>         }
> {code}
> Thanks to [~brandonli] for catching the issue.



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