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Jonathan Eagles commented on TEZ-3940: -------------------------------------- @jlowe, test failures are expected. Addressed your comments in the latest patch so that it applies to master. > Reduce time to convert TaskFinishedEvent to string > -------------------------------------------------- > > Key: TEZ-3940 > URL: https://issues.apache.org/jira/browse/TEZ-3940 > Project: Apache Tez > Issue Type: Bug > Reporter: Jonathan Eagles > Assignee: Jonathan Eagles > Priority: Major > Attachments: TEZ-3940.001.patch, TEZ-3940.002.patch, > TEZ-3940.003.patch > > > Found a small CPU improvement while investigating a high CPU AM. > {noformat} > "Dispatcher thread {Central}" #38 prio=5 os_prio=0 tid=0x00002ba188535800 > nid=0x1b3e3 runnable [0x00002ba1a3e02000] > java.lang.Thread.State: RUNNABLE > at java.util.Arrays.copyOf(Arrays.java:3332) > at > java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:124) > at > java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:448) > at java.lang.StringBuilder.append(StringBuilder.java:136) > at > org.apache.tez.common.counters.AbstractCounters.toString(AbstractCounters.java:344) > - locked <0x00000007a2ed6b80> (a > org.apache.tez.common.counters.TezCounters) > at > org.apache.tez.dag.history.events.TaskFinishedEvent.toString(TaskFinishedEvent.java:135) > at > org.apache.tez.dag.history.HistoryEventHandler.handleCriticalEvent(HistoryEventHandler.java:155) > at > org.apache.tez.dag.history.HistoryEventHandler.handle(HistoryEventHandler.java:259) > at > org.apache.tez.dag.app.dag.impl.TaskImpl.logJobHistoryTaskFinishedEvent(TaskImpl.java:923) > at > org.apache.tez.dag.app.dag.impl.TaskImpl$AttemptSucceededTransition.transition(TaskImpl.java:1116) > at > org.apache.tez.dag.app.dag.impl.TaskImpl$AttemptSucceededTransition.transition(TaskImpl.java:1036) > at > org.apache.hadoop.yarn.state.StateMachineFactory$MultipleInternalArc.doTransition(StateMachineFactory.java:385) > at > org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:302) > at > org.apache.hadoop.yarn.state.StateMachineFactory.access$300(StateMachineFactory.java:46) > at > org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:448) > - locked <0x0000000717ed2120> (a > org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine) > at > org.apache.tez.state.StateMachineTez.doTransition(StateMachineTez.java:59) > at org.apache.tez.dag.app.dag.impl.TaskImpl.handle(TaskImpl.java:826) > at org.apache.tez.dag.app.dag.impl.TaskImpl.handle(TaskImpl.java:112) > at > org.apache.tez.dag.app.DAGAppMaster$TaskEventDispatcher.handle(DAGAppMaster.java:2312) > at > org.apache.tez.dag.app.DAGAppMaster$TaskEventDispatcher.handle(DAGAppMaster.java:2299) > at > org.apache.tez.common.AsyncDispatcher.dispatch(AsyncDispatcher.java:180) > at > org.apache.tez.common.AsyncDispatcher$1.run(AsyncDispatcher.java:115) > at java.lang.Thread.run(Thread.java:745) > {noformat} -- This message was sent by Atlassian JIRA (v7.6.3#76005)