IllegalArgumentException in ConstraintSolverStrategy

2019-08-06 13:00:20.344 o.a.s.s.r.ResourceAwareScheduler timer [ERROR] propane-0-170-1564778552 Internal Error - Exception thrown when scheduling. Please check logs for details
java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: Don't know how to convert null to int
        at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_181]
        at java.util.concurrent.FutureTask.get(FutureTask.java:206) ~[?:1.8.0_181]
        at org.apache.storm.scheduler.resource.ResourceAwareScheduler.scheduleTopology(ResourceAwareScheduler.java:164) ~[storm-server-2.0.1.y.jar:2.0.1.y]
        at org.apache.storm.scheduler.resource.ResourceAwareScheduler.schedule(ResourceAwareScheduler.java:117) ~[storm-server-2.0.1.y.jar:2.0.1.y]
        at org.apache.storm.scheduler.blacklist.BlacklistScheduler.schedule(BlacklistScheduler.java:118) ~[storm-server-2.0.1.y.jar:2.0.1.y]
        at org.apache.storm.daemon.nimbus.Nimbus.computeNewSchedulerAssignments(Nimbus.java:2092) ~[storm-server-2.0.1.y.jar:2.0.1.y]
        at org.apache.storm.daemon.nimbus.Nimbus.lockingMkAssignments(Nimbus.java:2256) ~[storm-server-2.0.1.y.jar:2.0.1.y]
        at org.apache.storm.daemon.nimbus.Nimbus.mkAssignments(Nimbus.java:2242) ~[storm-server-2.0.1.y.jar:2.0.1.y]
        at org.apache.storm.daemon.nimbus.Nimbus.mkAssignments(Nimbus.java:2187) ~[storm-server-2.0.1.y.jar:2.0.1.y]
        at org.apache.storm.daemon.nimbus.Nimbus.lambda$launchServer$29(Nimbus.java:2890) ~[storm-server-2.0.1.y.jar:2.0.1.y]
        at org.apache.storm.StormTimer$1.run(StormTimer.java:110) [storm-client-2.0.1.y.jar:2.0.1.y]
        at org.apache.storm.StormTimer$StormTimerTask.run(StormTimer.java:226) [storm-client-2.0.1.y.jar:2.0.1.y]
Caused by: java.lang.IllegalArgumentException: Don't know how to convert null to int
        at org.apache.storm.utils.ObjectReader.getInt(ObjectReader.java:55) ~[storm-client-2.0.1.y.jar:2.0.1.y]
        at org.apache.storm.scheduler.resource.strategies.scheduling.ConstraintSolverStrategy.schedule(ConstraintSolverStrategy.java:263) ~[storm-server-2.0.1.y.jar:2.0.1.y]
        at org.apache.storm.scheduler.resource.ResourceAwareScheduler.lambda$scheduleTopology$3(ResourceAwareScheduler.java:161) ~[storm-server-2.0.1.y.jar:2.0.1.y]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_181]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[?:1.8.0_181]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[?:1.8.0_181]
        at java.lang.Thread.run(Thread.java:748) ~[?:1.8.0_181]