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Haibo Chen commented on YARN-4697: ---------------------------------- Default value is 100 as defined in YarnConfiguration > 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 > Attachments: yarn4697.001.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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)