[jira] [Commented] (HDFS-7843) A truncated file is corrupted after rollback from a rolling upgrade

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

    [ https://issues.apache.org/jira/browse/HDFS-7843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14337067#comment-14337067 ] 

Hadoop QA commented on HDFS-7843:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12700791/h7843_20150226.patch
  against trunk revision 1a68fc4.

    {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-hdfs-project/hadoop-hdfs:

                  org.apache.hadoop.hdfs.TestDecommission
                  org.apache.hadoop.hdfs.server.namenode.TestFileTruncate
                  org.apache.hadoop.hdfs.qjournal.TestNNWithQJM

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/9664//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/9664//console

This message is automatically generated.

> A truncated file is corrupted after rollback from a rolling upgrade
> -------------------------------------------------------------------
>
>                 Key: HDFS-7843
>                 URL: https://issues.apache.org/jira/browse/HDFS-7843
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Tsz Wo Nicholas Sze
>            Priority: Blocker
>         Attachments: h7843_20150226.patch
>
>
> Here is a rolling upgrade truncate test from [~brandonli].  The basic test step is: (3 nodes cluster with HA)
> 1. upload a file to hdfs
> 2. start rollingupgrade. finish rollingupgrade for namenode and one datanode. 
> 3. truncate the file in hdfs to 1byte
> 4. do rollback
> 5. download file from hdfs, check file size to be original size
> I see the file size in hdfs is correct but can't read it because the block is corrupted.



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