I am getting this error infrequently. Most of the time drill starts normally and sometimes this gives below error. I am running drill 1.6.0 in cluster mode. ZK has also setup.
Could some one please explain where the issue is ? 2016-08-04 03:45:15,870 [main] INFO o.a.d.e.s.s.PersistentStoreRegistry - Using the configured PStoreProvider class: 'org.apache.drill.exec.store.sy s.store.provider.ZookeeperPersistentStoreProvider'. 2016-08-04 03:45:16,430 [main] INFO o.apache.drill.exec.server.Drillbit - Construction completed (1294 ms). 2016-08-04 03:45:28,250 [main] WARN o.apache.drill.exec.server.Drillbit - Failure on close() java.lang.NullPointerException: null at org.apache.drill.exec.work.WorkManager.close(WorkManager.java:157) ~[drill-java-exec-1.6.0.jar:1.6.0] at org.apache.drill.common.AutoCloseables.close(AutoCloseables.java:76) ~[drill-common-1.6.0.jar:1.6.0] at org.apache.drill.common.AutoCloseables.close(AutoCloseables.java:64) ~[drill-common-1.6.0.jar:1.6.0] at org.apache.drill.exec.server.Drillbit.close(Drillbit.java:149) [drill-java-exec-1.6.0.jar:1.6.0] at org.apache.drill.exec.server.Drillbit.start(Drillbit.java:283) [drill-java-exec-1.6.0.jar:1.6.0] at org.apache.drill.exec.server.Drillbit.start(Drillbit.java:261) [drill-java-exec-1.6.0.jar:1.6.0] at org.apache.drill.exec.server.Drillbit.main(Drillbit.java:257) [drill-java-exec-1.6.0.jar:1.6.0] 2016-08-04 03:45:28,250 [main] INFO o.apache.drill.exec.server.Drillbit - Shutdown completed (1819 ms).