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https://issues.apache.org/jira/browse/YARN-4697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15166325#comment-15166325
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Hudson commented on YARN-4697:
------------------------------
FAILURE: Integrated in Hadoop-trunk-Commit #9364 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/9364/])
YARN-4697. NM aggregation thread pool is not bound by limits (haibochen
(rkanter: rev 954dd57043d2de4f962876c1b89753bfc7e4ce55)
*
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/logaggregation/TestLogAggregationService.java
*
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java
* hadoop-yarn-project/CHANGES.txt
*
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/yarn-default.xml
*
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/logaggregation/LogAggregationService.java
> NM aggregation thread pool is not bound by limits
> -------------------------------------------------
>
> Key: YARN-4697
> URL: https://issues.apache.org/jira/browse/YARN-4697
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: nodemanager
> Reporter: Haibo Chen
> Assignee: Haibo Chen
> Fix For: 2.9.0
>
> Attachments: yarn4697.001.patch, yarn4697.002.patch,
> yarn4697.003.patch, yarn4697.004.patch
>
>
> In the LogAggregationService.java we create a threadpool to upload logs from
> the nodemanager to HDFS if log aggregation is turned on. This is a cached
> threadpool which based on the javadoc is an ulimited pool of threads.
> In the case that we have had a problem with log aggregation this could cause
> a problem on restart. The number of threads created at that point could be
> huge and will put a large load on the NameNode and in worse case could even
> bring it down due to file descriptor issues.
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