Are you using the latest code from trunk? I believe there was an issue where an unfair priority was given to reads over writes and I think that has been fixed in trunk. Could you try downloading and compiling that latest version of MINA and see if you're still experience the same delays with writes?
-Mike wwTyler wrote: > HI > Recently I have experience something very weird when using Mina core 2 m1 as > my application network infrastructure. the thing is that my Mina Connector's > IoSession can not write and read simultaneously under heavy write and read > load. > > Here is my situation: > 1. I develop a Web service based application on JBoss Application > Server(let's say, serverA). The Web Service Method (let's say, methodA) have > to handle invocations or requests from hundreds of, or maybe thousands of, > clients. > 2. And, methodA handle those invocations by just create some specific XML > messages, and send them to another Server (let's say, serverB). > 3. I use NioSocketConnector in serverA to implement the connection with > serverB. this means the serverA is client, serverB is the socket server, and > there is only one session between them. > 4. In methodA, I use the only IoSession to send all the XML messages to > serverB. the code is like below: > Client.getSession().write((Object) xmlMessage); > 5. I have a IoHandler for the NioSocketConnector called MyIoHandler. The > main job of it is to handle all the response XML message in > MyIoHandler.messageReceived(). > > > While doing the performance test, I simulate 200 concurrent virtual users to > continuously call methodA. and the result is > that methodA swallow all the request from the virtual users, and > successfully write those XML message using session.write(). But the problem > is that MyIoHandler.messageReceived() was not acted as I expected. It only > handle very small amount of messages, and most of the response messages from > serverB are queued in the Mina's internal queue. If I stop all the virtual > users, the MyIoHandler.messageReceived() will resume the power, and begin > to handle. > > This is very strange, because my server's CPU usage is only about 40% during > the test, and it acted as IoSession can not write and read simultaneously > under heavy write and read load. > > I try to use connector.getSessionConfig().setUseReadOperation(true) and > call the session.read() after I write. Although it can make the session > write and read simultaneously, but the performance decreased dramatically. > > Questions: > 1. Can anyone tell me what's the reason of all above, or does someone know > how to fix it and make the server handle read and write all together? > 2. Do I need to synchronized the session? > > BTW, I am use java 1.5, mina 2.0m1, and jboss4.2.2. and I already disable > the ExecutorFilter. > > Thnak you in advance and Happy new year! > > >
