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Vinod Kumar Vavilapalli commented on YARN-162: ---------------------------------------------- Pity we didn't foresee this. The NM has per-app file handles open, but it doesn't close them till the application finishes. Arguably, this connections are to the data-nodes, but the DFSClient also keeps a transient connection to NNs which seem to be causing this. Will investigate more and take a stab at fixing this. > nodemanager log aggregation has scaling issues with namenode > ------------------------------------------------------------ > > Key: YARN-162 > URL: https://issues.apache.org/jira/browse/YARN-162 > Project: Hadoop YARN > Issue Type: Bug > Components: nodemanager > Affects Versions: 0.23.3 > Reporter: Nathan Roberts > Assignee: Vinod Kumar Vavilapalli > Priority: Critical > > Log aggregation causes fd explosion on the namenode. On large clusters this > can exhaust FDs to the point where datanodes can't check-in. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira