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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3513) HttpFS should cache filesystems
Date Fri, 29 Jun 2012 00:41:43 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13403625#comment-13403625
] 

Hadoop QA commented on HDFS-3513:
---------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12533919/HDFS-3513.patch
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 1 new or modified test files.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 eclipse:eclipse.  The patch built with eclipse:eclipse.

    -1 findbugs.  The patch appears to introduce 1 new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    +1 core tests.  The patch passed unit tests in hadoop-hdfs-project/hadoop-hdfs-httpfs.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/2720//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HDFS-Build/2720//artifact/trunk/patchprocess/newPatchFindbugsWarningshadoop-hdfs-httpfs.html
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/2720//console

This message is automatically generated.
                
> HttpFS should cache filesystems
> -------------------------------
>
>                 Key: HDFS-3513
>                 URL: https://issues.apache.org/jira/browse/HDFS-3513
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 2.0.0-alpha
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>         Attachments: HDFS-3513.patch, HDFS-3513.patch, HDFS-3513.patch
>
>
> HttpFS opens and closes a FileSystem instance against the backend filesystem (typically
HDFS) on every request. The FileSystem caching is not used as it does not have expiration/timeout
and filesystem instances in there live forever, for long running services like HttpFS this
is not a good thing as it would keep connections open to the NN.

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