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https://issues.apache.org/jira/browse/HDFS-6729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14290402#comment-14290402
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Hadoop QA commented on HDFS-6729:
---------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12694290/HDFS-6729.004.patch
against trunk revision 8f26d5a.
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 2 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:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 2.0.3) 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.cli.TestHDFSCLI
Test results:
https://builds.apache.org/job/PreCommit-HDFS-Build/9321//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/9321//console
This message is automatically generated.
> Support maintenance mode for DN
> -------------------------------
>
> Key: HDFS-6729
> URL: https://issues.apache.org/jira/browse/HDFS-6729
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 2.5.0
> Reporter: Lei (Eddy) Xu
> Assignee: Lei (Eddy) Xu
> Attachments: HDFS-6729.000.patch, HDFS-6729.001.patch,
> HDFS-6729.002.patch, HDFS-6729.003.patch, HDFS-6729.004.patch
>
>
> Some maintenance works (e.g., upgrading RAM or add disks) on DataNode only
> takes a short amount of time (e.g., 10 minutes). In these cases, the users do
> not want to report missing blocks on this DN because the DN will be online
> shortly without data lose. Thus, we need a maintenance mode for a DN so that
> maintenance work can be carried out on the DN without having to decommission
> it or the DN being marked as dead.
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