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https://issues.apache.org/jira/browse/HADOOP-11161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14158915#comment-14158915
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Hadoop QA commented on HADOOP-11161:
------------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest 
attachment 
  http://issues.apache.org/jira/secure/attachment/12672808/HADOOP-11161.3.patch
  against trunk revision 7f6ed7f.

    {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}.  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 2 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-common-project/hadoop-common hadoop-hdfs-project/hadoop-hdfs:

                  
org.apache.hadoop.hdfs.server.namenode.ha.TestPipelinesFailover
                  org.apache.hadoop.hdfs.TestEncryptionZonesWithKMS

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

Test results: 
https://builds.apache.org/job/PreCommit-HADOOP-Build/4861//testReport/
Findbugs warnings: 
https://builds.apache.org/job/PreCommit-HADOOP-Build/4861//artifact/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html
Console output: 
https://builds.apache.org/job/PreCommit-HADOOP-Build/4861//console

This message is automatically generated.

> Expose close method in KeyProvider to give clients of Provider 
> implementations a hook to release resources
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-11161
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11161
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Arun Suresh
>            Assignee: Arun Suresh
>         Attachments: HADOOP-11161.1.patch, HADOOP-11161.2.patch, 
> HADOOP-11161.3.patch
>
>
> The {{KMSClientProvider}} class needs to be have a {{close()}} method to 
> shutdown back ground executor threads.
> The {{DFSClient}} creates an instance of a {{KeyProvider}} during 
> initialization. If this KP is a {{KMSClientProvider}}, this needs to be 
> closed to prevent thread leakage



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