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https://issues.apache.org/jira/browse/YARN-2366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14076933#comment-14076933
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Hadoop QA commented on YARN-2366:
---------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12658247/YARN-2366.v1.patch
against trunk revision .
{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: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:green}+1 core tests{color}. The patch passed unit tests in
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs.
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-YARN-Build/4461//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/4461//console
This message is automatically generated.
> Speed up history server startup time
> ------------------------------------
>
> Key: YARN-2366
> URL: https://issues.apache.org/jira/browse/YARN-2366
> Project: Hadoop YARN
> Issue Type: Bug
> Affects Versions: 2.4.0
> Reporter: Siqi Li
> Assignee: Siqi Li
> Attachments: YARN-2366.v1.patch
>
>
> When history server starts up, It scans every history directories and put all
> history files into a cache, whereas this cache only stores 20K recent history
> files. Therefore, it is wasting a large portion of time loading old history
> files into the cache, and the startup time will keep increasing if we don't
> trim the number of history files. For example, when history server starts up
> with 2.5M history files in HDFS, it took ~5 minutes.
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