I have run into similar issues with out of memory problems and moved the code to use heap buffers instead of direct buffers.
See this page. http://mina.apache.org/faq.html#FAQ-Iget%7B%7BOutOfMemoryError%7D%7Dorre sponsetimeoutandconnectionresetunderheavyload. If you use the SSL filter is not controlled in the same way and you need to set an environment variable either at the java start line or programmatically by: System.setProperty("mina.sslfilter.directbuffer", "false"); Hope that helps, Scott ________________________________ From: Scott Carter [mailto:[EMAIL PROTECTED] Sent: Saturday, October 20, 2007 4:08 PM To: [email protected] Subject: Out of Memory issues with our mina proxy We have written a server proxy layer using the mina library, and everything works as it should except we are running into "Out of Memory" exceptions. We did the obvious things such as increasing the memory for the proxy and still always had the same issue (just took a little longer to produce it). We analyzed the application with a profiler and discovered that a thread from mina was creating LinkedBlockingQueue$Node objects that were not being garbage collected. I read a couple of previous posts on the issue and could not find a good solution. Based on the posts I did verify that these objects were not being garbage collected even after the server had been idol for a long time and all sessions had been closed. Our proxy binds to the outside port of a version control server and passes data back and fourth between clients and the version control server. I have attached our code, which is pretty simple, to this post. You can see that we have some methods that take a few bites off of the messages and verify the client for us, but other than that this is just a very straight forward proxy application. I really need some help to figure out how to get the LinkedBlockingQueue$Node objects garbage collected. I have posted below the stack trace that creates the LinkedBlockingQueue$Node objects from the mina thread: TRACE 319549: (thread=200037) java.util.concurrent.LinkedBlockingQueue$Node.<init>(LinkedBlockingQueue .java:70) java.util.concurrent.LinkedBlockingQueue.insert(LinkedBlockingQueue.java :129) java.util.concurrent.LinkedBlockingQueue.offer(LinkedBlockingQueue.java: 335) java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java: 653) org.apache.mina.filter.executor.ExecutorFilter.fireEvent(ExecutorFilter. java:101) org.apache.mina.filter.executor.ExecutorFilter.messageSent(ExecutorFilte r.java:214) org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageSent (AbstractIoFilterChain.java:320) org.apache.mina.common.support.AbstractIoFilterChain.access$1200(Abstrac tIoFilterChain.java:53) org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.message Sent(AbstractIoFilterChain.java:652) org.apache.mina.common.support.AbstractIoFilterChain$HeadFilter.messageS ent(AbstractIoFilterChain.java:503) org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageSent (AbstractIoFilterChain.java:320) org.apache.mina.common.support.AbstractIoFilterChain.fireMessageSent(Abs tractIoFilterChain.java:314) org.apache.mina.transport.socket.nio.SocketIoProcessor.doFlush(SocketIoP rocessor.java:358) org.apache.mina.transport.socket.nio.SocketIoProcessor.doFlush(SocketIoP rocessor.java:314) org.apache.mina.transport.socket.nio.SocketIoProcessor.access$600(Socket IoProcessor.java:44) org.apache.mina.transport.socket.nio.SocketIoProcessor$Worker.run(Socket IoProcessor.java:431) org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.j ava:39) java.lang.Thread.run(Thread.java:619) Thank you in advance for helping a Newbie. This is a production application that I need to get working ASAP. Thanks - Scott Conexant E-mail Firewall (Conexant.Com) made the following annotations --------------------------------------------------------------------- ********************** Legal Disclaimer **************************** "This email may contain confidential and privileged material for the sole use of the intended recipient. Any unauthorized review, use or distribution by others is strictly prohibited. If you have received the message in error, please advise the sender by reply email and delete the message. Thank you." ********************************************************************** ---------------------------------------------------------------------
