Created attachment 581592 [details]
log

Description of problem:

I created a vm as stateless vm. after running it once as stateless I removed the stateless tag and tried to run the vm normally - the vm failed to run with NPE. 
a second test, I marked the vm as stateless again and tried to run it, the stateless snapshot cannot be created for the vm so it can no longer run at all. 

tested for both stateless in vm properties and in run-once. 
once stateless is run the vm can no longer be used.  

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

si2.1

How reproducible:

100%

Steps to Reproduce:
1. create and run a stateless vm
2. stop the vm and remove the stateless tag
3. try to run the vm again
4. mark vm as stateless again 
5. try to run the vm
  
Actual results:

once removing the stateless tag from vm, we can no longer run the vm 


Expected results:

we should be able to run the vm

Additional info: log


2012-05-02 14:45:54,468 ERROR [org.ovirt.engine.core.vdsbroker.CreateVmVDSCommand] (pool-10-thread-41) [1147d5ae] Error in excuting CreateVmVDSCommand: java.lang.NullPointerExce
ption
        at org.ovirt.engine.core.vdsbroker.vdsbroker.VmInfoBuilder.buildVmNetworkInterfaces(VmInfoBuilder.java:246) [vdsbroker-3.1.0-0001.jar:]
        at org.ovirt.engine.core.vdsbroker.vdsbroker.CreateVDSCommand.buildVmData(CreateVDSCommand.java:63) [vdsbroker-3.1.0-0001.jar:]
        at org.ovirt.engine.core.vdsbroker.vdsbroker.CreateVDSCommand.ExecuteVdsBrokerCommand(CreateVDSCommand.java:21) [vdsbroker-3.1.0-0001.jar:]
        at org.ovirt.engine.core.vdsbroker.vdsbroker.VdsBrokerCommand.ExecuteVDSCommand(VdsBrokerCommand.java:75) [vdsbroker-3.1.0-0001.jar:]
        at org.ovirt.engine.core.vdsbroker.VDSCommandBase.ExecuteCommand(VDSCommandBase.java:60) [vdsbroker-3.1.0-0001.jar:]
        at org.ovirt.engine.core.dal.VdcCommandBase.Execute(VdcCommandBase.java:41) [engine-dal.jar:]
        at org.ovirt.engine.core.vdsbroker.CreateVmVDSCommand.ExecuteVdsIdCommand(CreateVmVDSCommand.java:70) [vdsbroker-3.1.0-0001.jar:]
        at org.ovirt.engine.core.vdsbroker.VdsIdVDSCommandBase.ExecuteVDSCommand(VdsIdVDSCommandBase.java:40) [vdsbroker-3.1.0-0001.jar:]
        at org.ovirt.engine.core.vdsbroker.VDSCommandBase.ExecuteCommand(VDSCommandBase.java:60) [vdsbroker-3.1.0-0001.jar:]
        at org.ovirt.engine.core.dal.VdcCommandBase.Execute(VdcCommandBase.java:41) [engine-dal.jar:]
        at org.ovirt.engine.core.vdsbroker.ResourceManager.runVdsCommand(ResourceManager.java:407) [vdsbroker-3.1.0-0001.jar:]
        at org.ovirt.engine.core.vdsbroker.proxy.ResourceManagerProxy.runVdsCommand(ResourceManagerProxy.java:24) [engine-vdsbroker.jar:]
        at sun.reflect.GeneratedMethodAccessor115.invoke(Unknown Source) [:1.6.0_24]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.6.0_24]
        at java.lang.reflect.Method.invoke(Method.java:616) [rt.jar:1.6.0_24]
        at org.jboss.as.ee.component.ManagedReferenceMethodInterceptorFactory$ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptorFactory.java:72) [jboss-as-ee.jar:7.1.1.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.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53) [jboss-invocation.jar:1.1.1.Final-redhat-1]
        at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:36) [jboss-as-ee.jar:7.1.1.Final-redhat-1]
        at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation.jar:1.1.1.Final-redhat-1]
        at org.jboss.as.jpa.interceptor.SBInvocationInterceptor.processInvocation(SBInvocationInterceptor.java:47)
        at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation.jar:1.1.1.Final-redhat-1]
        at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21) [jboss-invocation.jar:1.1.1.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.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) [jboss-invocation.jar:1.1.1.Final-redhat-1]
        at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:53) [jboss-as-ee.jar:7.1.1.Final-redhat-1]
        at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation.jar:1.1.1.Final-redhat-1]
        at org.jboss.as.ejb3.component.pool.PooledInstanceInterceptor.processInvocation(PooledInstanceInterceptor.java:51) [jboss-as-ejb3.jar:7.1.1.Final-redhat-1]
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