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https://issues.apache.org/jira/browse/HDFS-7944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14366263#comment-14366263
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Hadoop QA commented on HDFS-7944:
---------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12705154/HDFS-7944.01.patch
against trunk revision 32b4330.
{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: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.fs.TestFcHdfsCreateMkdir
The following test timeouts occurred in
hadoop-hdfs-project/hadoop-hdfs:
org.apache.hadoop.hdfs.server.namenode.TestCheckpoint
org.apache.hadoop.hdfs.TestDatanodeDeath
Test results:
https://builds.apache.org/job/PreCommit-HDFS-Build/9941//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/9941//console
This message is automatically generated.
> Minor cleanup of BlockPoolManager#getAllNamenodeThreads
> -------------------------------------------------------
>
> Key: HDFS-7944
> URL: https://issues.apache.org/jira/browse/HDFS-7944
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 2.6.0
> Reporter: Arpit Agarwal
> Assignee: Arpit Agarwal
> Priority: Minor
> Attachments: HDFS-7944.01.patch
>
>
> {{BlockPoolManager#getAllNamenodeThreads}} can avoid unnecessary list to
> array conversion and vice versa by returning an unmodifiable list.
> Since NN addition/removal is relatively rare we can just use a
> {{CopyOnWriteArrayList}} for concurrency.
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