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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5341) DirectoryScanner hold the object lock dataset too long in scan,it make the datanode turn into deadnode and block all reciving thread
Date Mon, 21 Oct 2013 10:20:42 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13800524#comment-13800524
] 

Hadoop QA commented on HDFS-5341:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12609378/HDFS-5341.patch
  against trunk revision .

    {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}.  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.qjournal.TestNNWithQJM
                  org.apache.hadoop.hdfs.server.balancer.TestBalancerWithNodeGroup

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

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/5245//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/5245//console

This message is automatically generated.

>  DirectoryScanner hold the object lock dataset too long in scan,it make the datanode
turn into deadnode and block all reciving thread
> -------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-5341
>                 URL: https://issues.apache.org/jira/browse/HDFS-5341
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>    Affects Versions: 2.0.4-alpha
>            Reporter: qus-jiawei
>              Labels: deadlock
>             Fix For: 2.1.0-beta
>
>         Attachments: HDFS-5341.000.patch
>
>
> When DirectoryScanner doing the scan function, it holding the dataset to diff the block
info between memory and disk.But it do a lot of disk operation because it call the file's
getlength funciton.
> So,such disk operation should move to the async disk scan



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