R3.0-2697-Vcenter-vm Add_port failed

2016-01-13 11:54:01,213 - INFO [Thread-4:ApiConnectorImpl@231] - >> Request: GET, /virtual-machine-interface/67827dc2-1f9c-4d30-a10c-774ffac0a70e
2016-01-13 11:54:01,219 - INFO [Thread-4:ApiConnectorImpl@257] - << Response Status: HTTP/1.1 200 OK
2016-01-13 11:54:01,223 - INFO [Thread-4:ApiConnectorImpl@231] - >> Request: GET, /instance-ip/a7a7972c-d438-41ce-9eaa-a767f0d9c5b3
2016-01-13 11:54:01,230 - INFO [Thread-4:ApiConnectorImpl@257] - << Response Status: HTTP/1.1 200 OK
2016-01-13 11:54:01,233 - ERROR [Thread-4:VRouterNotifier@87] - Exception in addPort for VMI <9dee0974-3bd6-435f-9772-2bc35d7d487d, 9bc0f48d-952d-4490-bf51-e1d04cf37951, null>: null
2016-01-13 11:54:01,237 - INFO [Thread-4:VCenterNotify@475] - +++++++++++++Update Processing Complete +++++++++++++++++++++

root@a5s6:/var/log/nova# tail -f /var/log/contrail/contrail-vcenter-plugin-stdout.log
        at net.juniper.contrail.vcenter.VirtualMachineInterfaceInfo.update(VirtualMachineInterfaceInfo.java:220)
        at net.juniper.contrail.vcenter.MainDB.update(MainDB.java:170)
        at net.juniper.contrail.vcenter.VirtualMachineInfo.update(VirtualMachineInfo.java:425)
        at net.juniper.contrail.vcenter.VCenterEventHandler.handleVmUpdateEvent(VCenterEventHandler.java:96)
        at net.juniper.contrail.vcenter.VCenterEventHandler.handle(VCenterEventHandler.java:70)
        at net.juniper.contrail.vcenter.VCenterNotify.handleChanges(VCenterNotify.java:449)
        at net.juniper.contrail.vcenter.VCenterNotify.handleUpdate(VCenterNotify.java:357)
        at net.juniper.contrail.vcenter.VCenterNotify.run(VCenterNotify.java:609)
        at java.lang.Thread.run(Thread.java:745)
4317431 [Thread-4] INFO net.juniper.contrail.vcenter.VCenterNotify - +++++++++++++Update Processing Complete +++++++++++++++++++++