4 Replies Latest reply on Mar 28, 2011 1:48 AM by jherry

    Parallels updates of VM fails

    jherry Novice

      When using vCloud API to reconfigure VMs of a vapp in multiple threads, hibernate of VCD reports this error:

      org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [com.vmware.vcloud.common.model.net.LogicalNetworkModel#831832908]
              at org.hibernate.persister.entity.AbstractEntityPersister.check(AbstractEntityPersister.java:1792)
              at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2435)
              at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2335)
              at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2635)
              at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:115)
              at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
              at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263)
              at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:168)
              at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)
              at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50)
              at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1027)
              at com.vmware.vcloud.common.persist.Conversation.flush(Conversation.java:497)
              at com.vmware.vcloud.common.persist.Conversation.commitTransaction(Conversation.java:191)
              at com.vmware.vcloud.net.dao.impl.HibernateLogicalNetworkDao.updateServiceConfiguration(HibernateLogicalNetworkDao.java:380)
              at com.vmware.vcloud.net.impl.DefaultLogicalNetworkManager.saveUpdatedServiceConfiguration(DefaultLogicalNetworkManager.java:1262)
              at com.vmware.vcloud.net.impl.DefaultLogicalNetworkManager.notifyNicsAddedOrRemoved(DefaultLogicalNetworkManager.java:1891)
              at com.vmware.ssdc.backend.services.impl.VmManagerImpl.updateVm(VmManagerImpl.java:1139)

      This is very annoying because we need to make all changes one after an other... it takes time!

        • 1. Re: Parallels updates of VM fails
          AJ Master

          do we mean hibernation of vcd appliance?

          • 2. Re: Parallels updates of VM fails
            jherry Novice

            I mean when VCD try to persist the virtual machine (and/or virtual appliance). This is what logs say.

            • 3. Re: Parallels updates of VM fails

              Given that there are relationships between VMs, the vApp they are owned by, and any vApp networks, you probably don't want to use multiple threads to try and update them all concurrently because, as you've found, you'll run into optimistic concurrency control problems.


              You're probably safe updating VMs from different vApps (where there is little to no overlap / relationships) concurrently, but beware whenever there are shared resources such as a network.

              1 person found this helpful
              • 4. Re: Parallels updates of VM fails
                jherry Novice

                Why don't you reduce the critic section by saving only modified datas?

                I mean, I would like to be able to update VirtualHardware section and GuestCustomization section at the same time, there is no common datas in it. Ok for the NetworkConnection which share network informations with other VMs.

                In fact DAO should update modified data, not the whole VM.