{"action":"closed","issue":{"url":"https://api.github.com/repos/fp7-netide/Engine/issues/73","repository_url":"https://api.github.com/repos/fp7-netide/Engine","labels_url":"https://api.github.com/repos/fp7-netide/Engine/issues/73/labels{/name}","comments_url":"https://api.github.com/repos/fp7-netide/Engine/issues/73/comments","events_url":"https://api.github.com/repos/fp7-netide/Engine/issues/73/events","html_url":"https://github.com/fp7-netide/Engine/issues/73","id":136042301,"number":73,"title":"Unrequested fence messages in Java core from Ryu backend","user":{"login":"ElisaRojas","id":2779496,"avatar_url":"https://avatars.githubusercontent.com/u/2779496?v=3","gravatar_id":"","url":"https://api.github.com/users/ElisaRojas","html_url":"https://github.com/ElisaRojas","followers_url":"https://api.github.com/users/ElisaRojas/followers","following_url":"https://api.github.com/users/ElisaRojas/following{/other_user}","gists_url":"https://api.github.com/users/ElisaRojas/gists{/gist_id}","starred_url":"https://api.github.com/users/ElisaRojas/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ElisaRojas/subscriptions","organizations_url":"https://api.github.com/users/ElisaRojas/orgs","repos_url":"https://api.github.com/users/ElisaRojas/repos","events_url":"https://api.github.com/users/ElisaRojas/events{/privacy}","received_events_url":"https://api.github.com/users/ElisaRojas/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/fp7-netide/Engine/labels/Backend","name":"Backend","color":"fad8c7"},{"url":"https://api.github.com/repos/fp7-netide/Engine/labels/bug","name":"bug","color":"fc2929"},{"url":"https://api.github.com/repos/fp7-netide/Engine/labels/Core","name":"Core","color":"e11d21"},{"url":"https://api.github.com/repos/fp7-netide/Engine/labels/ryu","name":"ryu","color":"009800"}],"state":"closed","locked":false,"assignee":{"login":"doriguzzi","id":1794129,"avatar_url":"https://avatars.githubusercontent.com/u/1794129?v=3","gravatar_id":"","url":"https://api.github.com/users/doriguzzi","html_url":"https://github.com/doriguzzi","followers_url":"https://api.github.com/users/doriguzzi/followers","following_url":"https://api.github.com/users/doriguzzi/following{/other_user}","gists_url":"https://api.github.com/users/doriguzzi/gists{/gist_id}","starred_url":"https://api.github.com/users/doriguzzi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/doriguzzi/subscriptions","organizations_url":"https://api.github.com/users/doriguzzi/orgs","repos_url":"https://api.github.com/users/doriguzzi/repos","events_url":"https://api.github.com/users/doriguzzi/events{/privacy}","received_events_url":"https://api.github.com/users/doriguzzi/received_events","type":"User","site_admin":false},"milestone":null,"comments":7,"created_at":"2016-02-24T12:04:18Z","updated_at":"2016-02-25T13:32:19Z","closed_at":"2016-02-25T13:32:19Z","body":"Hi,\r\n\r\nWhen debugging the Java core I've seen this other error trace appears more or less every 5 seconds and it appears from the very beginning (before pinging or anything) in the AliceBobCharlie scenario:\r\n```\r\n2016-02-24 12:50:55,545 | ERROR | tor Receive Loop | BackendManager                   | 66 - core.connectivity - 1.0.0.0-SNAPSHOT | Received unrequested FenceMessage: 'Message [Header=MessageHeader [Version=VERSION_1_2,Type=FENCE,Length=0,ModuleId=0,TransactionId=0,DatapathId=0],Payload=[]]'. Dropping message\r\n2016-02-24 12:50:55,546 | INFO  | tor Receive Loop | ZeroMQBasedConnector             | 66 - core.connectivity - 1.0.0.0-SNAPSHOT | Data received from 'backend-ryu-2959'.\r\n2016-02-24 12:50:55,546 | INFO  | tor Receive Loop | BackendManager                   | 66 - core.connectivity - 1.0.0.0-SNAPSHOT | Data received from backend 'backend-ryu-2959' with moduleId '0'.\r\n2016-02-24 12:50:55,547 | INFO  | tor Receive Loop | BackendManager                   | 66 - core.connectivity - 1.0.0.0-SNAPSHOT | Received unrequested Message: 'OpenFlowMessage [Header=MessageHeader [Version=VERSION_1_2,Type=OPENFLOW,Length=8,ModuleId=0,TransactionId=0,DatapathId=3],Type=ECHO_REPLY,OFMessage=OFEchoReplyVer10(xid=0, data=[])]'. Relaying to shim.\r\n2016-02-24 12:50:55,548 | INFO  | tor Receive Loop | ZeroMQBasedConnector             | 66 - core.connectivity - 1.0.0.0-SNAPSHOT | Sending to via relay to 'shim'.\r\n2016-02-24 12:50:55,548 | INFO  | tor Receive Loop | ZeroMQBasedConnector             | 66 - core.connectivity - 1.0.0.0-SNAPSHOT | Sent.\r\n2016-02-24 12:50:55,579 | INFO  | tor Receive Loop | ZeroMQBasedConnector             | 66 - core.connectivity - 1.0.0.0-SNAPSHOT | Data received from 'backend-ryu-2959'.\r\n2016-02-24 12:50:55,579 | INFO  | tor Receive Loop | BackendManager                   | 66 - core.connectivity - 1.0.0.0-SNAPSHOT | Data received from backend 'backend-ryu-2959' with moduleId '388'.\r\n2016-02-24 12:50:55,579 | INFO  | tor Receive Loop | BackendManager                   | 66 - core.connectivity - 1.0.0.0-SNAPSHOT | Received unrequested Message: 'Message [Header=MessageHeader [Version=VERSION_1_2,Type=TOPOLOGY_UPDATE,Length=0,ModuleId=388,TransactionId=0,DatapathId=0],Payload=[]]'. Relaying to shim.\r\n2016-02-24 12:50:55,579 | INFO  | tor Receive Loop | ZeroMQBasedConnector             | 66 - core.connectivity - 1.0.0.0-SNAPSHOT | Sending to via relay to 'shim'.\r\n2016-02-24 12:50:55,580 | INFO  | tor Receive Loop | ZeroMQBasedConnector             | 66 - core.connectivity - 1.0.0.0-SNAPSHOT | Sent.\r\n```\r\n\r\nIt's not a big deal, because the Java core just drop those messages, but I was wondering if you could check the Ryu backend behaviour and it that is normal or not, @doriguzzi , so that we can pass the token to @schwabe if it's something else, but it feels like messages from the Ryu backend.\r\n\r\nI've also noticed that the amount of unrequested fence messages increases after a sucessful ping (instead of 1 every 5 seconds, they are more than 1 every 5 seconds... but always every 5 seconds), but maybe it's just a coincidence.\r\n\r\nThank you!"}}