Tomcat crashes with regular java hprof dumps

I have deployed an webapp in tomcat.But my tomcat crashes within 1-4 days.It creates .hprof dumps.I analyzed the dumps using Eclipse Memory Analyzer Tool (MAT).I am new to this kind of error.Can anybody help me out on this.I have assigned 1 GB memory at-most for tomcat in my application.

Thanks.

Hi,

Which webapp did you deployed?
Are you using the Bundle Tomcat that we are providing?

regards,

Hi,
Thanks for your response.I have deployed an webapp in tomcat.I found the problem and fixed it.Tomcat XMX memory was very less thats why it was being crashed.