After upgrade Ovirt 4.1.3 to 4.1.4 it was failing to start or migrate the virtual machines
General command validation failure
2017-07-31 17:25:38,078+02 ERROR [org.ovirt.engine.core.bll.RunVmCommand] (default task-497) [949b0e76-a2a9-4978-9879-9d38fc12b77c] Error during ValidateFailure.: java.lang.NullPointerException
the server.log was logging following errors as well:
2017-07-31 17:28:16,228+02 INFO [org.quartz.core.JobRunShell] (DefaultQuartzScheduler8) Job DEFAULT.org.ovirt.engine.core.bll.scheduling.SchedulingManager.performLoadBalancing#-9223372036854775697 threw a JobExecutionException: : org.quartz.JobExecutionException: failed to execute job
at sun.reflect.GeneratedMethodAccessor259.invoke(Unknown Source) [:1.8.0_141]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_141]
at java.lang.reflect.Method.invoke(Method.java:498) [rt.jar:1.8.0_141]
at org.ovirt.engine.core.utils.timer.JobWrapper.invokeMethod(JobWrapper.java:83) [scheduler.jar:]
at org.ovirt.engine.core.utils.timer.JobWrapper.execute(JobWrapper.java:55) [scheduler.jar:]
at org.quartz.core.JobRunShell.run(JobRunShell.java:213) [quartz.jar:]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [rt.jar:1.8.0_141]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [rt.jar:1.8.0_141]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [rt.jar:1.8.0_141]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [rt.jar:1.8.0_141]
at java.lang.Thread.run(Thread.java:748) [rt.jar:1.8.0_141]
To fix:
It is turning out that upgrade process was resetting the Scheduling Policy to NULL or none.Edit Cluster->Scheduling Policy-> Select Policy: vm_evently_distributed
