與ODL（0.6.3）控製器第一次連接過程中，被斷開了連接，請教是什麼原因？

控製器上報了錯誤： severity=ERROR, errorType=APPLICATION, tag=operation-failed, applicatiOnTag=null, info=null, cause=java.lang.IllegalArgumentException: Metadata not available for modification NodeModification [identifier=(urn:opendaylight:inventory?revision=2013-08-19)node-connector[{(urn:opendaylight:inventory?revision=2013-08-19)id=3}], modificatiOnType=TOUCH, childModification={AugmentationIdentifier{childNames=[current-speed, state, maximum-speed, reason, configuration, supported, hardware-address, name, queue, port-number, peer-features, advertised-features, current-feature]}=NodeModification [identifier=AugmentationIdentifier{childNames=[current-speed, state, maximum-speed, reason, configuration, supported, hardware-address, name, queue, port-number, peer-features, advertised-features, current-feature]}, modificatiOnType=TOUCH, childModification={queue=NodeModification [identifier=queue, modificatiOnType=MERGE, childModification={queue[{queue-id=0}]=NodeModification [identifier=queue[{queue-id=0}], modificatiOnType=WRITE, childModification={}], queue[{queue-id=3}]=NodeModification [identifier=queue[{queue-id=3}], modificatiOnType=WRITE, childModification={}], queue[{queue-id=4}]=NodeModification [identifier=queue[{queue-id=4}], modificatiOnType=WRITE, childModification={}], queue[{queue-id=1}]=NodeModification [identifier=queue[{queue-id=1}], modificatiOnType=WRITE, childModification={}], queue[{queue-id=2}]=NodeModification [identifier=queue[{queue-id=2}], modificatiOnType=WRITE, childModification={}], queue[{queue-id=7}]=NodeModification [identifier=queue[{queue-id=7}], modificatiOnType=WRITE, childModification={}], queue[{queue-id=5}]=NodeModification [identifier=queue[{queue-id=5}], modificatiOnType=WRITE, childModification={}], queue[{queue-id=6}]=NodeModification [identifier=queue[{queue-id=6}], modificatiOnType=WRITE, childModification={}]}]}]}]]]}

其中有個現象是： 1、新增vlan2 2、vlan2裏不設置任何接口 3、openflow映射vlan2 4、激活openflow成功 5、再往vlan2中增加接口 6、連接狀態正常 7、斷開控製器再打開，連接失敗。失敗錯誤同上麵一樣