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Richard Zowalla closed STORM-3764. ---------------------------------- Fix Version/s: 2.6.0 Resolution: Fixed > Nimbus has internal scheduling errors when backtracking > ------------------------------------------------------- > > Key: STORM-3764 > URL: https://issues.apache.org/jira/browse/STORM-3764 > Project: Apache Storm > Issue Type: Improvement > Components: storm-server > Reporter: Bipin Prasad > Assignee: Bipin Prasad > Priority: Major > Fix For: 2.6.0 > > Time Spent: 20m > Remaining Estimate: 0h > > While backtracking in scheduling code, Ackers are skipped. However, under > certain circumstances a null WorkerSlot is passed as parameter to > SchedulingSearcherState.backtrack(). This null key is used to retrieve an > entry from Map. The returned null map value causes NPE. > {code} > 2021-03-30 15:27:03.212 o.a.s.s.r.ResourceAwareScheduler timer [ERROR] > mx3_test-5-1614799784 Internal Error - Exception thrown when scheduling. > Please check logs for details java.util.concurrent.ExecutionException: > java.lang.NullPointerException > at java.util.concurrent.FutureTask.report(FutureTask.java:122) > ~[?:1.8.0_262] > at java.util.concurrent.FutureTask.get(FutureTask.java:206) ~[?:1.8.0_262] > at > org.apache.storm.scheduler.resource.ResourceAwareScheduler.scheduleTopology(ResourceAwareScheduler.java:191) > ~[storm-server-2.3.0.y.jar:2.3.0.y] > at > org.apache.storm.scheduler.resource.ResourceAwareScheduler.schedule(ResourceAwareScheduler.java:132) > ~[storm-server-2.3.0.y.jar:2.3.0.y] > at > org.apache.storm.scheduler.blacklist.BlacklistScheduler.schedule(BlacklistScheduler.java:131) > ~[storm-server-2.3.0.y.jar:2.3.0.y] > at > org.apache.storm.daemon.nimbus.Nimbus.computeNewSchedulerAssignments(Nimbus.java:2314) > ~[storm-server-2.3.0.y.jar:2.3.0.y] > at > org.apache.storm.daemon.nimbus.Nimbus.lambda$lockingMkAssignments$44(Nimbus.java:2493) > ~[storm-server-2.3.0.y.jar:2.3.0.y] > at > org.apache.storm.daemon.nimbus.Nimbus.executeWithLock(Nimbus.java:4549) > ~[storm-server-2.3.0.y.jar:2.3.0.y] > at > org.apache.storm.daemon.nimbus.Nimbus.lockingMkAssignments(Nimbus.java:2491) > ~[storm-server-2.3.0.y.jar:2.3.0.y] > at org.apache.storm.daemon.nimbus.Nimbus.mkAssignments(Nimbus.java:2478) > ~[storm-server-2.3.0.y.jar:2.3.0.y] > at org.apache.storm.daemon.nimbus.Nimbus.mkAssignments(Nimbus.java:2415) > ~[storm-server-2.3.0.y.jar:2.3.0.y] > at > org.apache.storm.daemon.nimbus.Nimbus.lambda$launchServer$17(Nimbus.java:1420) > ~[storm-server-2.3.0.y.jar:2.3.0.y] > at org.apache.storm.StormTimer$1.run(StormTimer.java:110) > [storm-client-2.3.0.y.jar:2.3.0.y] > at org.apache.storm.StormTimer$StormTimerTask.run(StormTimer.java:226) > [storm-client-2.3.0.y.jar:2.3.0.y] > Caused by: java.lang.NullPointerException > at > org.apache.storm.scheduler.resource.strategies.scheduling.SchedulingSearcherState.backtrack(SchedulingSearcherState.java:292) > ~[storm-server-2.3.0.y.jar:2.3.0.y] > at > org.apache.storm.scheduler.resource.strategies.scheduling.BaseResourceAwareStrategy.scheduleExecutorsOnNodes(BaseResourceAwareStrategy.java:559) > ~[storm-server-2.3.0.y.jar:2.3.0.y] > at > org.apache.storm.scheduler.resource.strategies.scheduling.BaseResourceAwareStrategy.schedule(BaseResourceAwareStrategy.java:172) > ~[storm-server-2.3.0.y.jar:2.3.0.y] > at > org.apache.storm.scheduler.resource.ResourceAwareScheduler.lambda$scheduleTopology$1(ResourceAwareScheduler.java:189) > ~[storm-server-2.3.0.y.jar:2.3.0.y] > at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_262] > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) > ~[?:1.8.0_262] > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) > ~[?:1.8.0_262] > at java.lang.Thread.run(Thread.java:748) ~[?:1.8.0_262] > {code} -- This message was sent by Atlassian Jira (v8.20.10#820010)