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Date: Sat, 11 Oct 2014 01:58:34 +0000 (UTC)
From: "Hadoop QA (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12742608.1411082000000.244796.1412992714044@Atlassian.JIRA>
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 <JIRA.12742608.1411082000199@arcas>
Subject: [jira] [Commented] (HDFS-7090) Use unbuffered writes when
 persisting in-memory replicas
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    [ https://issues.apache.org/jira/browse/HDFS-7090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14167941#comment-14167941 ] 

Hadoop QA commented on HDFS-7090:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12674290/HDFS-7090.3.patch
  against trunk revision f4b7e99.

    {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}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:red}-1 findbugs{color}.  The patch appears to introduce 3 new Findbugs (version 2.0.3) warnings.

        {color:red}-1 release audit{color}.  The applied patch generated 1 release audit warnings.

    {color:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-common-project/hadoop-common hadoop-hdfs-project/hadoop-hdfs:

                  org.apache.hadoop.hdfs.server.namenode.ha.TestDNFencingWithReplication
                  org.apache.hadoop.hdfs.server.namenode.ha.TestDNFencing
                  org.apache.hadoop.hdfs.server.balancer.TestBalancer
                  org.apache.hadoop.hdfs.server.namenode.snapshot.TestOpenFilesWithSnapshot

                                      The following test timeouts occurred in hadoop-common-project/hadoop-common hadoop-hdfs-project/hadoop-hdfs:

org.apache.hadoop.hdfs.TestDatanodeBlockScanner

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

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/8398//testReport/
Release audit warnings: https://builds.apache.org/job/PreCommit-HDFS-Build/8398//artifact/patchprocess/patchReleaseAuditProblems.txt
Findbugs warnings: https://builds.apache.org/job/PreCommit-HDFS-Build/8398//artifact/patchprocess/newPatchFindbugsWarningshadoop-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HDFS-Build/8398//artifact/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/8398//console

This message is automatically generated.

> Use unbuffered writes when persisting in-memory replicas
> --------------------------------------------------------
>
>                 Key: HDFS-7090
>                 URL: https://issues.apache.org/jira/browse/HDFS-7090
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>    Affects Versions: 2.6.0
>            Reporter: Arpit Agarwal
>            Assignee: Xiaoyu Yao
>             Fix For: 3.0.0
>
>         Attachments: HDFS-7090.0.patch, HDFS-7090.1.patch, HDFS-7090.2.patch, HDFS-7090.3.patch, HDFS-7090.4.patch
>
>
> The LazyWriter thread just uses {{FileUtils.copyFile}} to copy block files to persistent storage. It would be better to use unbuffered writes to avoid churning page cache.


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