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ASF GitHub Bot commented on YARN-11578: --------------------------------------- brumi1024 commented on PR #6120: URL: https://github.com/apache/hadoop/pull/6120#issuecomment-1743034385 Additionally, @tomicooler can you please do the backports for 3.3 and 3.2 branches? > Fix performance issue of permission check in verifyAndCreateRemoteLogDir > ------------------------------------------------------------------------ > > Key: YARN-11578 > URL: https://issues.apache.org/jira/browse/YARN-11578 > Project: Hadoop YARN > Issue Type: Bug > Reporter: Tamas Domok > Assignee: Tamas Domok > Priority: Major > Labels: pull-request-available > Fix For: 3.4.0 > > > YARN-10901 introduced a check to avoid a warn message in NN logs in certain > situations (when /tmp/logs is not owned by the yarn user), but it adds 3 > NameNode calls (create, setpermission, delete) during log aggregation > collection, for *every* NM. Meaning, when a YARN job completes, at the YARN > log aggregation phase this check is done for every job, from every > NodeManager. > In 30 minutes 4.2 % of all the NameNode calls were due to this in a cluster. > "write" calls need a Namesystem writeLock as well, so the impact is bigger. -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org