org.jboss.web.localhost.Engine - StandardWrapperValve....Ou

[jigar_a_shah83]

I am getting following error on my jboss logs frequently.

2007-03-25 12:13:23,069 ERROR [[e-mail]:***:***:***] [http-0.0.0.0-8080-Processor16] org.jboss.web.localhost.Engine - StandardWrapperValve[mm1]: Servlet.service() for servlet mm1 threw exception
java.lang.OutOfMemoryError

It does not stop any operation neither it shutdowns server. Everything looks fine except this exception. What could be the reason for this my jboss start configuration includes
-Xms512m -Xmx1024m

So it does not look like low java heap memory issue. Is there any memory leak here ? If yes, Then how i can locate that ? What could be possible reason for the same ?

This is a snapshot of log. if we look closely then its with thread [http-0.0.0.0-8080-Processor16]

2007-03-25 12:13:23,061 INFO [[e-mail]:***:***:***] [http-0.0.0.0-8080-Processor25] com.coremobility.mmsc.servlet.MMServlet - MMServlet:doPost:start
2007-03-25 12:13:23,065 INFO [[e-mail]:***:7816081974 from 68.246.46.200:***] [http-0.0.0.0-8080-Processor16] com.coremobility.mmsc.servlet.MMServlet - MMServlet:doPost:end
2007-03-25 12:13:23,068 DEBUG [[e-mail]:***:9498721450 from 70.6.244.94:***] [http-0.0.0.0-8080-Processor25] com.coremobility.mmsc.servlet.MMServlet - Received a POST request:/mm1/ from client IP:70.6.244.94 User-Agent:SN-SCP-7050/0101 CM-Lib/F.2.1.3.6 Content-Length:1101 Content-Type:application/vnd.wap.mms-message
2007-03-25 12:13:23,069 INFO [[e-mail]:***:9498721450 from 70.6.244.94:***] [http-0.0.0.0-8080-Processor25] com.coremobility.mmsc.servlet.MMServlet - Authenticating mdn 9498721450
2007-03-25 12:13:23,069 ERROR [[e-mail]:***:***:***] [http-0.0.0.0-8080-Processor16] org.jboss.web.localhost.Engine - StandardWrapperValve[mm1]: Servlet.service() for servlet mm1 threw exception
java.lang.OutOfMemoryError
2007-03-25 12:13:23,167 INFO [[e-mail]:***:9498721450 from 70.6.244.94:***] [http-0.0.0.0-8080-Processor25] com.coremobility.mmsc.servlet.MMServlet - Authenticated successfully
2007-03-25 12:13:23,167 DEBUG [[e-mail]:***:9498721450 from 70.6.244.94:***] [http-0.0.0.0-8080-Processor25] com.coremobility.mmsc.servlet.MMServlet - WSP packet received:1101 bytes