my android ros app could not communicate with pc ros node.

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I find a strange situation. one of my ros node output this msg.it seems my android pad' ros application reboot some times,but the connections still existed. Anyone could help me?I'm already crazy for this...

 Publisher update for [/app_pub]: http://192.168.3.6:36688/,  already have these connections: http://192.168.3.139:57698/, http://192.168.3.139:36246/, http://192.168.3.139:54061/, http://192.168.3.139:40459/, http://192.168.3.139:58692/, http://192.168.3.139:57233/, http://192.168.3.139:56187/, http://192.168.3.139:48314/, http://192.168.3.6:54257/, http://192.168.3.139:57571/, http://192.168.3.139:55081/, http://192.168.3.139:48241/, http://192.168.3.139:44010/, http://192.168.3.139:57393/, http://192.168.3.139:48197/, http://192.168.3.139:46441/, http://192.168.3.139:60237/, http://192.168.3.139:45659/, http://192.168.3.139:55788/, http://192.168.3.139:53056/, http://192.168.3.139:48663/, http://192.168.3.139:59840/, http://192.168.3.139:56863/, http://192.168.3.139:48547/, http://192.168.3.139:53514/, http://192.168.3.139:55558/, http://192.168.3.139:57290/, http://192.168.3.139:36826/, http://192.168.3.139:41271/, http://192.168.3.139:56862/, http://192.168.3.6:36688/, http://192.168.3.139:48932/, http://192.168.3.139:48394/, http://192.168.3.139:57060/, http://192.168.3.139:43928/, http://192.168.3.139:41786/, http://192.168.3.139:43852/, http://192.168.3.139:53031/, http://192.168.3.139:34707/, http://192.168.3.139:38785/, http://192.168.3.139:33709/, http://192.168.3.139:42508/, http://192.168.3.139:58905/, http://192.168.3.139:43268/, http://192.168.3.139:49680/, http://192.168.3.139:49617/, http://192.168.3.139:52572/, http://192.168.3.139:44098/, http://192.168.3.139:53909/, http://192.168.3.139:35645/, http://192.168.3.139:47942/, http://192.168.3.139:49952/, http://192.168.3.139:52421/, http://192.168.3.139:41063/, http://192.168.3.139:45838/, http://192.168.3.139:51717/, http://192.168.3.139:59099/, http://192.168.3.139:50764/, http://192.168.3.139:35171/, http://192.168.3.139:46112/, http://192.168.3.139:41244/, http://192.168.3.139:42793/, http://192.168.3.139:51001/, http://192.168.3.139:59118/, http://192.168.3.139:43439/, http://192.168.3.139:43710/, http://192.168.3.139:49116/, http://192.168.3.139:39252/, http://192.168.3.139:55594/, http://192.168.3.139:37000/, http://192.168.3.139:54437/, http://192.168.3.139:55367/, http://192.168.3.139:43802/, http://192.168.3.139:53114/, http://192.168.3 ...