[ https://issues.apache.org/jira/browse/YARN-8632?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xianghao Lu updated YARN-8632: ------------------------------ Description: Recently, I have beenning using [SchedulerLoadSimulator|https://hadoop.apache.org/docs/r2.7.2/hadoop-sls/SchedulerLoadSimulator.html] to validate the impact of changes on my FairScheduler. I encountered some problems. Firstly, I fix a npe bug with the patch in https://issues.apache.org/jira/browse/YARN-4302 Secondly, Everything seems to be ok, but I just get "[]" in file realtimetrack.json. Finally, I find the MetricsLogRunnable thread will exit because of npe, the reason is "wrapper.getQueueSet()" is still null when executing "String metrics = web.generateRealTimeTrackingMetrics();" So, we should put "String metrics = web.generateRealTimeTrackingMetrics();" in try section to avoid MetricsLogRunnable thread exit with unexpected exception. My hadoop version is 2.7.2, it seems that hadoop trunk branch also has this the second problem and I have made a patch to solve it. was: Recently, I have beenning using [SchedulerLoadSimulator|https://hadoop.apache.org/docs/r2.7.2/hadoop-sls/SchedulerLoadSimulator.html] to validate the impact of changes on my FairScheduler. I encountered some problems. Firstly, I fix a npe bug with the patch in https://issues.apache.org/jira/browse/YARN-4302 Secondly, Everything seems to be ok, but I just get "[]" in file realtimetrack.json. Finally, I find the MetricsLogRunnable thread will exit because of npe, the reason is "wrapper.getQueueSet()" is still null when executing "String metrics = web.generateRealTimeTrackingMetrics();" So, we should put "String metrics = web.generateRealTimeTrackingMetrics();" in try section to avoid MetricsLogRunnable thread exit with unexpected exception. My hadoop version is 2.7.2, it seems that hadoop trunk branch also has this problem and I have made a patch to solve it. > No data in file realtimetrack.json after running SchedulerLoadSimulator > ----------------------------------------------------------------------- > > Key: YARN-8632 > URL: https://issues.apache.org/jira/browse/YARN-8632 > Project: Hadoop YARN > Issue Type: Bug > Components: scheduler-load-simulator > Reporter: Xianghao Lu > Priority: Major > > Recently, I have beenning using > [SchedulerLoadSimulator|https://hadoop.apache.org/docs/r2.7.2/hadoop-sls/SchedulerLoadSimulator.html] > to validate the impact of changes on my FairScheduler. I encountered some > problems. > Firstly, I fix a npe bug with the patch in > https://issues.apache.org/jira/browse/YARN-4302 > Secondly, Everything seems to be ok, but I just get "[]" in file > realtimetrack.json. Finally, I find the MetricsLogRunnable thread will exit > because of npe, > the reason is "wrapper.getQueueSet()" is still null when executing "String > metrics = web.generateRealTimeTrackingMetrics();" > So, we should put "String metrics = web.generateRealTimeTrackingMetrics();" > in try section to avoid MetricsLogRunnable thread exit with unexpected > exception. > My hadoop version is 2.7.2, it seems that hadoop trunk branch also has this > the second problem and I have made a patch to solve it. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org