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https://issues.apache.org/jira/browse/YARN-7695?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16309278#comment-16309278
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stefanlee commented on YARN-7695:
---------------------------------
there is another problem in this scenario, when i turn on
*ContinuousScheduling* , and submit a lot of applications, then my cluster have
no available resource, active RM1's log print
{code:java}
2018-01-03 16:05:49,860 INFO
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.AppSchedulable:
Making reservation: node=datanode2 app_id=application_1514952157240_0019
2018-01-03 16:05:49,860 INFO
org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerApplicationAttempt:
Application application_1514952157240_0019 reserved container
container_1514952157240_0019_02_000003 on node host: datanode2:37528
#containers=2 available=<memory:2048, vCores:1> used=<memory:4096, vCores:2>,
currently has 1 at priority 10; currentReservation 3072
2018-01-03 16:05:49,860 INFO
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSSchedulerNode:
Updated reserved container container_1514952157240_0019_02_000003 on node host:
datanode2:37528 #containers=2 available=<memory:2048, vCores:1>
used=<memory:4096, vCores:2> for application
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSSchedulerApp@a9790a8
2018-01-03 16:05:49,868 INFO
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler:
Trying to fulfill reservation for application
appattempt_1514952157240_0019_000002 on node: host: datanode2:37528
#containers=2 available=<memory:2048, vCores:1> used=<memory:4096, vCores:2>
2018-01-03 16:05:49,868 INFO
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.AppSchedulable:
Making reservation: node=datanode2 app_id=application_1514952157240_0019
2018-01-03 16:05:49,868 INFO
org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerApplicationAttempt:
Application application_1514952157240_0019 reserved container
container_1514952157240_0019_02_000003 on node host: datanode2:37528
#containers=2 available=<memory:2048, vCores:1> used=<memory:4096, vCores:2>,
currently has 1 at priority 10; currentReservation 3072
{code}
, then i repeat 3 step in description, active RM1 transit to standby, RM2 runs
normaly, but standby RM1's log still print above info, it seems
*ContinuousScheduling* runs in dead loop. so i think it is best to stop these
thread when RM1 transit to standby in this scenario.
> when active RM transit to standby , this RM will new another
> FairSchedulerUpdate Thread
> ---------------------------------------------------------------------------------------
>
> Key: YARN-7695
> URL: https://issues.apache.org/jira/browse/YARN-7695
> Project: Hadoop YARN
> Issue Type: Bug
> Components: fairscheduler, resourcemanager
> Affects Versions: 2.4.0
> Reporter: stefanlee
>
> 1. i test haoop-2.4.0 in my cluster.
> 2. RM1 is active and RM2 is standby
> 3. i delete /yarn-leader-election/Yarn/ActiveStandbyElectorLock from ZK
> 4. RM1 then transit from active to standby success.
> 5. at last ,i print RM1 jstack info and found two "AllocationFileReloader"
> and two "FairSchedulerUpdateThread" in RM1.
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