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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5728) [Diskfull] Block recovery will fail if the metafile not having crc for all chunks of the block
Date Wed, 08 Jan 2014 07:18:51 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13865158#comment-13865158
] 

Hadoop QA commented on HDFS-5728:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12621917/HDFS-5728.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:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-hdfs-project/hadoop-hdfs:

                  org.apache.hadoop.hdfs.server.namenode.ha.TestBootstrapStandbyWithQJM

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

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/5843//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/5843//console

This message is automatically generated.

> [Diskfull] Block recovery will fail if the metafile not having crc for all chunks of
the block
> ----------------------------------------------------------------------------------------------
>
>                 Key: HDFS-5728
>                 URL: https://issues.apache.org/jira/browse/HDFS-5728
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>    Affects Versions: 2.2.0
>            Reporter: Vinay
>            Assignee: Vinay
>         Attachments: HDFS-5728.patch
>
>
> 1. Client (regionsever) has opened stream to write its WAL to HDFS. This is not one time
upload, data will be written slowly.
> 2. One of the DataNode got diskfull ( due to some other data filled up disks)
> 3. Unfortunately block was being written to only this datanode in cluster, so client
write has also failed.
> 4. After some time disk is made free and all processes are restarted.
> 5. Now HMaster try to recover the file by calling recoverLease. 
> At this time recovery was failing saying file length mismatch.
> When checked,
>  actual block file length: 62484480
>  Calculated block length: 62455808
> This was because, metafile was having crc for only 62455808 bytes, and it considered
62455808 as the block size.
> No matter how many times, recovery was continously failing.



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