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From "Bibin A Chundatt (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-9508) YarnConfiguration areNodeLabel enabled is costly in allocation flow
Date Wed, 24 Apr 2019 08:10:00 GMT
Bibin A Chundatt created YARN-9508:
--------------------------------------

             Summary: YarnConfiguration areNodeLabel enabled is costly in allocation flow
                 Key: YARN-9508
                 URL: https://issues.apache.org/jira/browse/YARN-9508
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Bibin A Chundatt


For every allocate request locking can be avoided. Improving performance

{noformat}
"pool-6-thread-300" #624 prio=5 os_prio=0 tid=0x00007f2f91152800 nid=0x8ec5 waiting for monitor
entry [0x00007f1ec6a8d000]
 java.lang.Thread.State: BLOCKED (on object monitor)
 at org.apache.hadoop.conf.Configuration.getProps(Configuration.java:2841)
 - waiting to lock <0x00007f1f8107c748> (a org.apache.hadoop.yarn.conf.YarnConfiguration)
 at org.apache.hadoop.conf.Configuration.get(Configuration.java:1214)
 at org.apache.hadoop.conf.Configuration.getTrimmed(Configuration.java:1268)
 at org.apache.hadoop.conf.Configuration.getBoolean(Configuration.java:1674)
 at org.apache.hadoop.yarn.conf.YarnConfiguration.areNodeLabelsEnabled(YarnConfiguration.java:3646)
 at org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerUtils.normalizeAndValidateRequest(SchedulerUtils.java:234)
 at org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerUtils.normalizeAndvalidateRequest(SchedulerUtils.java:274)
 at org.apache.hadoop.yarn.server.resourcemanager.RMServerUtils.normalizeAndValidateRequests(RMServerUtils.java:261)
 at org.apache.hadoop.yarn.server.resourcemanager.DefaultAMSProcessor.allocate(DefaultAMSProcessor.java:242)
 at org.apache.hadoop.yarn.server.resourcemanager.scheduler.constraint.processor.DisabledPlacementProcessor.allocate(DisabledPlacementProcessor.java:75)
 at org.apache.hadoop.yarn.server.resourcemanager.AMSProcessingChain.allocate(AMSProcessingChain.java:92)
 at org.apache.hadoop.yarn.server.resourcemanager.ApplicationMasterService.allocate(ApplicationMasterService.java:427)
 - locked <0x00007f24dd3f9e40> (a org.apache.hadoop.yarn.server.resourcemanager.ApplicationMasterService$AllocateResponseLock)
 at org.apache.hadoop.yarn.sls.appmaster.MRAMSimulator$1.run(MRAMSimulator.java:352)
 at org.apache.hadoop.yarn.sls.appmaster.MRAMSimulator$1.run(MRAMSimulator.java:349)
 at java.security.AccessController.doPrivileged(Native Method)
 at javax.security.auth.Subject.doAs(Subject.java:422)
 at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1729)
 at org.apache.hadoop.yarn.sls.appmaster.MRAMSimulator.sendContainerRequest(MRAMSimulator.java:348)
 at org.apache.hadoop.yarn.sls.appmaster.AMSimulator.middleStep(AMSimulator.java:212)
 at org.apache.hadoop.yarn.sls.scheduler.TaskRunner$Task.run(TaskRunner.java:94)
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
 at java.lang.Thread.run(Thread.java:745)
{noformat}



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