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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4181) LeaseManager tries to double remove and prints extra messages
Date Mon, 12 Nov 2012 23:07:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13495735#comment-13495735
] 

Hadoop QA commented on HDFS-4181:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12553193/hdfs-4181-trunk.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:green}+1 core tests{color}.  The patch passed unit tests in 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/3488//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/3488//console

This message is automatically generated.
                
> LeaseManager tries to double remove and prints extra messages
> -------------------------------------------------------------
>
>                 Key: HDFS-4181
>                 URL: https://issues.apache.org/jira/browse/HDFS-4181
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.23.4, 2.0.2-alpha
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>            Priority: Critical
>         Attachments: hdfs-4181-branch-0.23.patch, hdfs-4181-branch-0.23.patch, hdfs-4181-trunk.patch,
hdfs-4181-trunk.patch
>
>
> When checkLeases() runs, internalReleaseLease() is called on the expired ones. When it
returns true, the lease is already removed, yet it is tried again in checkLease(). This causes
unnecessary ERROR messages to be logged. The line doing {{removing.add(p)}} should be removed.
> The internalReleaseLease() method logs a detailed message per call, so the extra INFO
log message from checkLease() is redundant. 
> The error message from removeLease() can be very big and needs to be cut down. When the
namenode itself is holding a lot of leases for block recovery, hitting this error is very
expensive. In one instance, slow block recovery caused the namenode to hold more than 42K
leases. The one log line in this case was over 4 MB.  The dump of data structure should be
only enabled in debug mode.

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