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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3405) Checkpointing should use HTTP POST or PUT instead of GET-GET to send merged fsimages
Date Mon, 26 Aug 2013 10:57:52 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13749986#comment-13749986

Hadoop QA commented on HDFS-3405:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  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-client 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/4887//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/4887//console

This message is automatically generated.
> Checkpointing should use HTTP POST or PUT instead of GET-GET to send merged fsimages
> ------------------------------------------------------------------------------------
>                 Key: HDFS-3405
>                 URL: https://issues.apache.org/jira/browse/HDFS-3405
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 1.0.0, 3.0.0, 2.0.5-alpha
>            Reporter: Aaron T. Myers
>            Assignee: Vinay
>         Attachments: HDFS-3405.patch, HDFS-3405.patch, HDFS-3405.patch, HDFS-3405.patch
> As Todd points out in [this comment|https://issues.apache.org/jira/browse/HDFS-3404?focusedCommentId=13272986&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13272986],
the current scheme for a checkpointing daemon to upload a merged fsimage file to an NN is
to issue an HTTP get request to tell the target NN to issue another GET request back to the
checkpointing daemon to retrieve the merged fsimage file. There's no fundamental reason the
checkpointing daemon can't just use an HTTP POST or PUT to send back the merged fsimage file,
rather than the double-GET scheme.

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