[jira] [Commented] (HDFS-4805) Webhdfs client is fragile to token renewal errors

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

    [ https://issues.apache.org/jira/browse/HDFS-4805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13654803#comment-13654803 ] 

Hadoop QA commented on HDFS-4805:
---------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12582657/HDFS-4805.patch
  against trunk revision .

    {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}.  The javadoc tool did not generate any 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 1.3.9) 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-common-project/hadoop-common 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/4377//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/4377//console

This message is automatically generated.
                
> Webhdfs client is fragile to token renewal errors
> -------------------------------------------------
>
>                 Key: HDFS-4805
>                 URL: https://issues.apache.org/jira/browse/HDFS-4805
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: webhdfs
>    Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>            Priority: Critical
>         Attachments: HDFS-4805.patch
>
>
> Webhdfs internally acquires a token that will be used for DN-based operations.  The token renewer in common will try to renew that token.  If a renewal fails for any reason, it will try to get another token.  If that fails, it gives up and the token webhdfs holds will soon expire.
> A transient network outage or a restart of the NN may cause webhdfs to be left holding an expired token, effectively rendering webhdfs useless.  This is fatal for daemons.

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