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Hudson commented on HADOOP-14412: --------------------------------- SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #11741 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/11741/]) HADOOP-14412. HostsFileReader#getHostDetails is very expensive on large (rohithsharmaks: rev d87a63a9019d74a1c338c724e050952843a153e5) * (edit) hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/NodesListManager.java * (edit) hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestHostsFileReader.java * (edit) hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/HostsFileReader.java > HostsFileReader#getHostDetails is very expensive on large clusters > ------------------------------------------------------------------ > > Key: HADOOP-14412 > URL: https://issues.apache.org/jira/browse/HADOOP-14412 > Project: Hadoop Common > Issue Type: Bug > Components: util > Affects Versions: 2.8.0 > Reporter: Jason Lowe > Assignee: Jason Lowe > Fix For: 2.9.0, 3.0.0-alpha3, 2.8.2 > > Attachments: HADOOP-14412.001.patch, HADOOP-14412.002.patch, > HADOOP-14412-branch-2.001.patch, HADOOP-14412-branch-2.002.patch, > HADOOP-14412-branch-2.002.patch, HADOOP-14412-branch-2.8.002.patch > > > After upgrading one of our large clusters to 2.8 we noticed many IPC server > threads of the resourcemanager spending time in NodesListManager#isValidNode > which in turn was calling HostsFileReader#getHostDetails. The latter is > creating complete copies of the include and exclude sets for every node > heartbeat, and these sets are not small due to the size of the cluster. > These copies are causing multiple resizes of the underlying HashSets being > filled and creating lots of garbage. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org