Created attachment 1876316 [details]
logs

Description of problem:
As part of our automation tests, one TC failed because it couldn't get this action link:
/ovirt-engine/api/vms/<vm_id>/backups/<backup_id>/finalize

The backup starts:
022-04-29 08:38:22,146+03 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (default task-11) [backups_create_c282888a-5ecd-4997] EVENT_ID: USER_CREATE_SNAPSHOT(45), Snapshot 'Auto-generated for Backup VM' creation for VM 'vm_TestCase27319_2908344326' was initiated by admin@internal-authz.

2022-04-29 08:38:22,209+03 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (default task-11) [backups_create_c282888a-5ecd-4997] EVENT_ID: VM_BACKUP_STARTED(10,790), Backup cd85119f-ae93-4c8a-8e80-07325cfa60ac for VM vm_TestCase27319_2908344326 started (User: admin@internal-authz).

2022-04-29 08:38:37,820+03 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-31) [backups_create_c282888a-5ecd-4997] EVENT_ID: USER_CREATE_SNAPSHOT_FINISHED_SUCCESS(68), Snapshot 'Auto-generated for Backup VM' creation for VM 'vm_TestCase27319_2908344326' has been completed.

Then, it tries to get this action link /ovirt-engine/api/vms/<vm_id>/backups/<backup_id>/finalize to run finalization and failed because it couldn't find it.

Because the test failed, we clean the env before moving to the next test and as part of this step we remove the VM:

2022-04-29 08:38:49,186+03 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (default task-11) [vms_delete_574c271d-c2ce-4a1f] EVENT_ID: USER_REMOVE_VM_FINISHED(113), VM vm_TestCase27319_2908344326 was successfully removed by admin@internal-authz.

Then I start seeing NPE errors:
2022-04-29
 08:38:51,982+03 ERROR [org.ovirt.engine.core.bll.CommandsFactory] 
(EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-57)
 [backups_create_c282888a-5ecd-4997] An exception has occurred while 
trying to create a command object for command 'CreateSnapshotForVm' with
 parameters 
'CreateSnapshotForVmParameters:{commandId='0f77d597-7821-49ac-9e6d-ec15a9ae0dd7',
 user='admin', commandType='CreateSnapshotForVm', 
vmId='d72a44c7-ef3b-488a-b4c6-af0d7a96e097'}': WELD-000049: Unable to 
invoke protected final void 
org.ovirt.engine.core.bll.CommandBase.postConstruct() on 
org.ovirt.engine.core.bll.snapshots.CreateSnapshotForVmCommand@63906c76
2022-04-29
 08:38:51,983+03 ERROR [org.ovirt.engine.core.bll.CommandsFactory] 
(EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-57)
 [backups_create_c282888a-5ecd-4997] Exception: 
java.lang.NullPointerException
    at 
deployment.engine.ear.bll.jar//org.ovirt.engine.core.bll.snapshots.CreateSnapshotForVmCommand.isMemorySnapshotSupported(CreateSnapshotForVmCommand.java:702)
 
   at 
deployment.engine.ear.bll.jar//org.ovirt.engine.core.bll.snapshots.CreateSnapshotForVmCommand.init(CreateSnapshotForVmCommand.java:129)
    at deployment.engine.ear.bll.jar//org.ovirt.engine.core.bll.CommandBase.postConstruct(CommandBase.java:217)
    at jdk.internal.reflect.GeneratedMethodAccessor224.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
 
   at 
org.jboss.weld.core.6.Final-redhat-00001//org.jboss.weld.injection.producer.DefaultLifecycleCallbackInvoker.invokeMethods(DefaultLifecycleCallbackInvoker.java:83)
 
   at 
org.jboss.weld.core.6.Final-redhat-00001//org.jboss.weld.injection.producer.DefaultLifecycleCallbackInvoker.postConstruct(DefaultLifecycleCallbackInvoker.java:66)
 
   at 
org.jboss.weld.core.6.Final-redhat-00001//org.jboss.weld.injection.producer.BasicInjectionTarget.postConstruct(BasicInjectionTarget.java:122)
    at deployment.engine.ear//org.ovirt.engine.core.di.Injector.injectMembers(Injector.java:41)
    at deployment.engine.ear.bll.jar//org.ovirt.engine.core.bll.CommandsFactory.createCommand(CommandsFactory.java:107)
 
   at 
deployment.engine.ear.bll.jar//org.ovirt.engine.core.bll.tasks.CommandsRepository.retrieveCommand(CommandsRepository.java:167)
  at 
deployment.engine.ear.bll.jar//org.ovirt.engine.core.bll.tasks.CommandsRepository.retrieveCommand(CommandsRepository.java:154)
 
   at 
deployment.engine.ear.bll.jar//org.ovirt.engine.core.bll.tasks.CommandCoordinatorImpl.retrieveCommand(CommandCoordinatorImpl.java:127)
 
   at 
deployment.engine.ear.bll.jar//org.ovirt.engine.core.bll.tasks.CommandCoordinatorUtil.retrieveCommand(CommandCoordinatorUtil.java:310)
 
   at 
deployment.engine.ear.bll.jar//org.ovirt.engine.core.bll.ChildCommandsCallbackBase.getCommand(ChildCommandsCallbackBase.java:189)
 
   at 
deployment.engine.ear.bll.jar//org.ovirt.engine.core.bll.ChildCommandsCallbackBase.doPolling(ChildCommandsCallbackBase.java:45)
 
   at 
deployment.engine.ear.bll.jar//org.ovirt.engine.core.bll.tasks.CommandCallbacksPoller.invokeCallbackMethodsImpl(CommandCallbacksPoller.java:175)
 
   at 
deployment.engine.ear.bll.jar//org.ovirt.engine.core.bll.tasks.CommandCallbacksPoller.invokeCallbackMethods(CommandCallbacksPoller.java:109)
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
    at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
 
   at 
org.glassfish.javax.enterprise.concurrent.1.redhat-00001//org.glassfish.enterprise.concurrent.internal.ManagedScheduledThreadPoolExecutor$ManagedScheduledFutureTask.access$201(ManagedScheduledThreadPoolExecutor.java:360)
 
   at 
org.glassfish.javax.enterprise.concurrent.1.redhat-00001//org.glassfish.enterprise.concurrent.internal.ManagedScheduledThreadPoolExecutor$ManagedScheduledFutureTask.run(ManagedScheduledThreadPoolExecutor.java:511)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:829)
 
   at 
org.glassfish.javax.enterprise.concurrent.1.redhat-00001//org.glassfish.enterprise.concurrent.ManagedThreadFactoryImpl$ManagedThread.run(ManagedThreadFactoryImpl.java:227)

2022-04-29
 08:38:51,984+03 ERROR 
[org.ovirt.engine.core.bll.SerialChildCommandsExecutionCallback] 
(EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-57)
 [backups_create_c282888a-5ecd-4997] Command 'HybridBackup' id: 
'cd85119f-ae93-4c8a-8e80-07325cfa60ac' with children 
[0f77d597-7821-49ac-9e6d-ec15a9ae0dd7] failed when attempting to perform
 the next operation, marking as 'ACTIVE'

Version-Release number of selected component (if applicable):
ovirt-engine-4.5.0.5-0.7.el8ev

How reproducible:
once, couldn't reproduce so far

Steps to Reproduce:
- For the missing action link, I don;t have a reproducer
- For the NPE, try to remove a VM during a running backup.

Actual results:
actions link was missing, NPE when removing a VM during a running backup

Expected results:
action link exists, no NPE in logs, 

Additional info:
Attaching logs