+++ This bug was initially created as a clone of Bug #966153 +++

Description of problem:

I restarted vdsm during End Command of CreateSnapshotCommand. 
engine gets a ArrayIndexOutOfBoundsException: -1 error. 
it does not report success or failure for the live migration but event log reports that the snapshot was created successfully and we free the vm 

Snapshot 'Auto-generated for Live Storage Migration' creation for VM 'vcdvf' has been completed.

I tried to live storage migrate the disk again to see if it's just an exception in the log but what happens is that we send the createVolume task and although its finished we do not clean it so the vm is stuck in that step forever. 


this bug might be related to 965676 but is in a different step and has different results. 

Version-Release number of selected component (if applicable):

sf17.1

How reproducible:

100%

Steps to Reproduce:
1. create a vm from snapshot and run it on spm. 
2. LSM the vm disk and when End Action of CreateSnapshotCommand is run restart the vdsm on spm
3. when vm lock is released LSM the disk again

Actual results:

the firs time we get ArrayIndexOutOfBoundsException: -1 but vm is freed. 
the second time engine fails to clean the createVolume task which is finished successfully and vm is locked in that step forever. 

Expected results:

we should not hey ArrayIndexOutOfBoundsException: -1  error. 

Additional info: logs

both tasks are shown in vdsm: 

ab69c85f-c506-4756-b269-5fb7e824ff7c :
        verb = createVolume
        id = ab69c85f-c506-4756-b269-5fb7e824ff7c
31689665-a832-47a7-a7e8-e62c516867c7 :
        verb = createVolume
        id = 31689665-a832-47a7-a7e8-e62c516867c7

{'status': {'message': 'OK', 'code': 0}, 'allTasksStatus': {'ab69c85f-c506-4756-b269-5fb7e824ff7c': {'message': '1 jobs completed successfully', 'code': 0, 'taskID': 'ab69c85f-c506-4756-b269-5fb7e824ff7c', 'taskResult': 'success', 'task
State': 'finished'}, '31689665-a832-47a7-a7e8-e62c516867c7': {'message': '1 jobs completed successfully', 'code': 0, 'taskID': '31689665-a832-47a7-a7e8-e62c516867c7', 'taskResult': 'success', 'taskState': 'finished'}}}




2013-05-22 18:12:35,051 ERROR [org.ovirt.engine.core.bll.lsm.LiveMigrateVmDisksCommand] (pool-4-thread-49) Ending command with failure: org.ovirt.engine.core.bll.lsm.LiveMigrateVmDisksCommand
2013-05-22 18:12:35,055 ERROR [org.ovirt.engine.core.bll.EntityAsyncTask] (pool-4-thread-49) EntityAsyncTask::EndCommandAction [within thread]: EndAction for action type LiveMigrateVmDisks threw an exception: javax.ejb.EJBException: java.lang.ArrayIndexOutOfBoundsException: -1
        at org.jboss.as.ejb3.tx.CMTTxInterceptor.handleExceptionInNoTx(CMTTxInterceptor.java:191) [jboss-as-ejb3.jar:7.2.0.Final-redhat-8]
        at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInNoTx(CMTTxInterceptor.java:237) [jboss-as-ejb3.jar:7.2.0.Final-redhat-8]
        at org.jboss.as.ejb3.tx.CMTTxInterceptor.supports(CMTTxInterceptor.java:374) [jboss-as-ejb3.jar:7.2.0.Final-redhat-8]
        at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:218) [jboss-as-ejb3.jar:7.2.0.Final-redhat-8]
        at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation.jar:1.1.1.Final-redhat-2]
        at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41) [jboss-as-ejb3.jar:7.2.0.Final-redhat-8]
        at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation.jar:1.1.1.Final-redhat-2]
        at org.jboss.as.ejb3.component.interceptors.ShutDownInterceptorFactory$1.processInvocation(ShutDownInterceptorFactory.java:64) [jboss-as-ejb3.jar:7.2.0.Final-redhat-8]
        at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation.jar:1.1.1.Final-redhat-2]
        at org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:59) [jboss-as-ejb3.jar:7.2.0.Final-redhat-8]
        at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation.jar:1.1.1.Final-redhat-2]
        at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50) [jboss-as-ee.jar:7.2.0.Final-redhat-8]
        at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation.jar:1.1.1.Final-redhat-2]
        at org.jboss.as.ee.component.TCCLInterceptor.processInvocation(TCCLInterceptor.java:45) [jboss-as-ee.jar:7.2.0.Final-redhat-8]
        at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation.jar:1.1.1.Final-redhat-2]
        at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) [jboss-invocation.jar:1.1.1.Final-redhat-2]
        at org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:165) [jboss-as-ee.jar:7.2.0.Final-redhat-8]
        at org.jboss.as.ee.component.ViewDescription$1.processInvocation(ViewDescription.java:182) [jboss-as-ee.jar:7.2.0.Final-redhat-8]
        at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation.jar:1.1.1.Final-redhat-2]
        at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) [jboss-invocation.jar:1.1.1.Final-redhat-2]
        at org.jboss.as.ee.component.ProxyInvocationHandler.invoke(ProxyInvocationHandler.java:72) [jboss-as-ee.jar:7.2.0.Final-redhat-8]
        at org.ovirt.engine.core.bll.interfaces.BackendInternal$$$view8.endAction(Unknown Source) [engine-bll.jar:]
        at org.ovirt.engine.core.bll.EntityAsyncTask.EndCommandAction(EntityAsyncTask.java:147) [engine-bll.jar:]
        at org.ovirt.engine.core.bll.EntityAsyncTask.access$000(EntityAsyncTask.java:26) [engine-bll.jar:]