Hi. I am using a k=4 fat-tree topology. When the flow numbers become large (and also, importantly, the communication with controller become heavier), I often got keyError.
core.openflow.connections[dpid] Seemingly, the dpid or to say the switch lost the connection with the switch. So when I send something back to the switch, I got error. I wonder, what results that connection loss? And is there a way to avoid it ? And I'd like to know during the execution of my own code, what other events are happening under the hood? Do I need any explicit lock? (Though I think it shouldn't apply here). I am using fatree with k=4, and the flow number is about 150 among all hosts. I think it's a relatively small scale, but the result error is too dissatisfying. Btw, when I lower done the number of flows, like, lower it to 30, the problem won't occur. Thanks. -- 吾輩は猫である。ホームーページはhttp://introo.me。
