nvazquez commented on issue #4061:
URL: https://github.com/apache/cloudstack/issues/4061#issuecomment-625612810
Logs:
````
2020-05-07 23:12:28,116 INFO [c.c.v.VirtualMachineManagerImpl]
(Work-Job-Executor-25:ctx-0a8703ef job-79/job-80 ctx-a3fc4a74) (logid:936f1123)
Migrating VM[User|i-2-8-VM] to
Dest[Zone(Id)-Pod(Id)-Cluster(Id)-Host(Id)-Storage(Volume(Id|Type-->Pool(Id))]
: Dest[Zone(1)-Pod(1)-Cluster(1)-Host(2)-Storage()]
2020-05-07 23:12:28,120 DEBUG [c.c.n.NetworkModelImpl]
(Work-Job-Executor-25:ctx-0a8703ef job-79/job-80 ctx-a3fc4a74) (logid:936f1123)
Service SecurityGroup is not supported in the network id=210
2020-05-07 23:12:28,125 DEBUG [c.c.n.NetworkModelImpl]
(Work-Job-Executor-25:ctx-0a8703ef job-79/job-80 ctx-a3fc4a74) (logid:936f1123)
Service SecurityGroup is not supported in the network id=210
2020-05-07 23:12:28,127 ERROR [c.c.v.VmWorkJobHandlerProxy]
(Work-Job-Executor-25:ctx-0a8703ef job-79/job-80 ctx-a3fc4a74) (logid:936f1123)
Invocation exception, caused by: java.lang.ClassCastException: class
com.cloud.vm.VMInstanceVO$$EnhancerByCGLIB$$1786dcb5 cannot be cast to class
com.cloud.vm.UserVmVO (com.cloud.vm.VMInstanceVO$$EnhancerByCGLIB$$1786dcb5 and
com.cloud.vm.UserVmVO are in unnamed module of loader 'app')
2020-05-07 23:12:28,127 INFO [c.c.v.VmWorkJobHandlerProxy]
(Work-Job-Executor-25:ctx-0a8703ef job-79/job-80 ctx-a3fc4a74) (logid:936f1123)
Rethrow exception java.lang.ClassCastException: class
com.cloud.vm.VMInstanceVO$$EnhancerByCGLIB$$1786dcb5 cannot be cast to class
com.cloud.vm.UserVmVO (com.cloud.vm.VMInstanceVO$$EnhancerByCGLIB$$1786dcb5 and
com.cloud.vm.UserVmVO are in unnamed module of loader 'app')
2020-05-07 23:12:28,127 DEBUG [c.c.v.VmWorkJobDispatcher]
(Work-Job-Executor-25:ctx-0a8703ef job-79/job-80) (logid:936f1123) Done with
run of VM work job: com.cloud.vm.VmWorkMigrate for VM 8, job origin: 79
2020-05-07 23:12:28,127 ERROR [c.c.v.VmWorkJobDispatcher]
(Work-Job-Executor-25:ctx-0a8703ef job-79/job-80) (logid:936f1123) Unable to
complete AsyncJobVO {id:80, userId: 2, accountId: 2, instanceType: null,
instanceId: null, cmd: com.cloud.vm.VmWorkMigrate, cmdInfo:
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-AAlwcQB-AAk,
cmdVersion: 0, status: IN_PROGRESS, processStatus: 0, resultCode: 0, result:
null, initMsid: 32989593536621, completeMsid: null, lastUpdated: null,
lastPolled: null, created: Thu May 07 23:12:27 UTC 2020, removed: null}, job
origin:79
java.lang.ClassCastException: class
com.cloud.vm.VMInstanceVO$$EnhancerByCGLIB$$1786dcb5 cannot be cast to class
com.cloud.vm.UserVmVO (com.cloud.vm.VMInstanceVO$$EnhancerByCGLIB$$1786dcb5 and
com.cloud.vm.UserVmVO are in unnamed module of loader 'app')
at
com.cloud.network.element.VirtualRouterElement.prepareMigration(VirtualRouterElement.java:1226)
at
org.apache.cloudstack.engine.orchestration.NetworkOrchestrator.prepareNicForMigration(NetworkOrchestrator.java:1778)
at
com.cloud.vm.VirtualMachineManagerImpl.migrate(VirtualMachineManagerImpl.java:2358)
````
Strangely, assert check passes but casting fails:
````
} else if (vm.getType() == VirtualMachine.Type.User) {
assert vm instanceof UserVmVO;
final UserVmVO userVm = (UserVmVO) vm.getVirtualMachine();
_userVmMgr.setupVmForPvlan(false, userVm.getHostId(), nic);
}`
````
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