MINA 1.X is way old. Would recommend you to upgrade to the latest MINA release.
Try migrating. Some of the differences are listed here http://mina.apache.org/changes-between-2x-and-1x.html thanks ashish On Tue, Mar 16, 2010 at 8:26 PM, Cleber Cassol <ccas...@gmail.com> wrote: > Hi there. > > We are using Mina 1.1.7 for some time now. We are developing a system that > will act as a proxy between our clients (e-mail clients like Thunderbird, > cell phones and so on) and our IMAP mail server. Basically, a client > connects and sends IMAP commands. Then, the proxy parses those commands if > necessary, drops them if they can't be handled by us and ultimately sends > those commands to our mail server. The mail server responds accordingly and > the proxy simply passes its responses to the client. Our production > environment so far: > > Mina Version 1.1.7 > java version "1.6.0_12" > Java(TM) SE Runtime Environment (build 1.6.0_12-b04) > Java HotSpot(TM) 64-Bit Server VM (build 11.2-b01, mixed mode) > CENTOS Linux > > The problem is: even under a low load (about 50 requests per minute), the > memory consumption is always increasing. After about 12 hours, our > application begins swapping and eventually the JVM dies. After a lot of > profiling it using JProfiler, we discovered that a lot of SocketIoSession > objects were being held somewhere (more than 30.000). We are not using the > ProxyFilter because no documentation on it was found. Basically, we do the > following: > > - Client requests a connection > - Acceptor accepts it and then we start receiving commands > - After authentication, the Connector connects to our mail server and pass > the received commands through it. > - The mail server responds and its responses are passed back to the client > > So, we have two IoSession objects per client. One for the client and the > proxy, another for the proxy and the mail server. It has to be that way > because every connection with the IMAP mail server must be authenticated for > one user, thus we cannot reuse the same connection for sending requests for > various users. Our mail server has a limited capacity, so we have to cut > idle connections with it after 5 seconds. There's a thread for that task. > This thread sweeps the Acceptor's and Connector's managedConnections > collection and, if getLastWriteTime() returns something that indicates it's > been idle for more than 5 seconds, it closes the connection and remove it > from the respective collection. > > One single IMAP command can generate A LOT of responses. For example, when > the e-mail client is downloading a big message with attachments on it. Also, > an APPEND command generates a lot of binary requests to store the data. I > don't know where to look anymore. I've also tried to use heap buffers, but > now our application crashes after 3 or 4 days. It's better, but there's > still a leak somewhere. Could you lend me some hand and help me find it? If > it's MINA related, of course. > > Thank you very much for your attention. I'll gladly send you any resources > you may find useful.
