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Jun Gong commented on YARN-2617: -------------------------------- Get it. Thank you! > NM does not need to send finished container whose APP is not running to RM > -------------------------------------------------------------------------- > > Key: YARN-2617 > URL: https://issues.apache.org/jira/browse/YARN-2617 > Project: Hadoop YARN > Issue Type: Bug > Components: nodemanager > Affects Versions: 2.6.0 > Reporter: Jun Gong > Assignee: Jun Gong > Fix For: 2.6.0 > > Attachments: YARN-2617.2.patch, YARN-2617.3.patch, YARN-2617.4.patch, > YARN-2617.patch > > > We([~chenchun]) are testing RM work preserving restart and found the > following logs when we ran a simple MapReduce task "PI". NM continuously > reported completed containers whose Application had already finished while AM > had finished. > {code} > 2014-09-26 17:00:42,228 INFO > org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler: > Null container completed... > 2014-09-26 17:00:42,228 INFO > org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler: > Null container completed... > 2014-09-26 17:00:43,230 INFO > org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler: > Null container completed... > 2014-09-26 17:00:43,230 INFO > org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler: > Null container completed... > 2014-09-26 17:00:44,233 INFO > org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler: > Null container completed... > 2014-09-26 17:00:44,233 INFO > org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler: > Null container completed... > {code} > In the patch for YARN-1372, ApplicationImpl on NM should guarantee to clean > up already completed applications. But it will only remove appId from > 'app.context.getApplications()' when ApplicaitonImpl received evnet > 'ApplicationEventType.APPLICATION_LOG_HANDLING_FINISHED' , however NM might > receive this event for a long time or could not receive. > * For NonAggregatingLogHandler, it wait for > YarnConfiguration.NM_LOG_RETAIN_SECONDS which is 3 * 60 * 60 sec by default, > then it will be scheduled to delete Application logs and send the event. > * For LogAggregationService, it might fail(e.g. if user does not have HDFS > write permission), and it will not send the event. -- This message was sent by Atlassian JIRA (v6.3.4#6332)