Created attachment 624809 [details]
engine log

Description of problem:
When starting VM with stateless=True, NPE occurs:
2012-10-10 13:11:43,690 ERROR [org.ovirt.engine.core.bll.EntityAsyncTask] (pool-4-thread-50) EntityAsyncTask::EndCommandAction [within thread]: EndAction for action type RunVmOnce threw an exception: java.lang.NullPointerException
	at org.ovirt.engine.core.bll.Backend.endAction(Backend.java:355) [engine-bll.jar:]
	at sun.reflect.GeneratedMethodAccessor207.invoke(Unknown Source) [:1.7.0_05-icedtea]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_05-icedtea]
	at java.lang.reflect.Method.invoke(Method.java:601) [rt.jar:1.7.0_05-icedtea]
	at org.jboss.as.ee.component.ManagedReferenceMethodInterceptorFactory$ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptorFactory.java:72) [jboss-as-ee.jar:7.1.2.Final-redhat-1]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation.jar:1.1.1.Final-redhat-1]
	at org.jboss.invocation.InterceptorContext$Invocation.proceed(InterceptorContext.java:374) [jboss-invocation.jar:1.1.1.Final-redhat-1]
	at org.ovirt.engine.core.utils.ThreadLocalSessionCleanerInterceptor.injectWebContextToThreadLocal(ThreadLocalSessionCleanerInterceptor.java:11) [engine-utils.jar:]
	at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) [:1.7.0_05-icedtea]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_05-icedtea]
	at java.lang.reflect.Method.invoke(Method.java:601) [rt.jar:1.7.0_05-icedtea]
	at org.jboss.as.ee.component.ManagedReferenceLifecycleMethodInterceptorFactory$ManagedReferenceLifecycleMethodInterceptor.processInvocation(ManagedReferenceLifecycleMethodInterceptorFactory.java:123) [jboss-as-ee.jar:7.1.2.Final-redhat-1]


Version-Release number of selected component (if applicable):
rhevm-backend-3.1.0-20.el6ev.noarch

How reproducible:
Always

Steps to Reproduce:
1. Have a VM 
2. Start it with stateless checkbox checked (or set it stateless as default)
  
Actual results:
NPE, task hangs

Expected results:
Snapshot is created and VM is started

Additional info:
seems like we already had it - bug 520818
Backend log attached