I have ubuntu server 12.04 installed on a VM with tomcat 7 installed, My problem is that tomcat crashes every few hours (2-5) for no clear reason (no exceptions or errors in catalina logs or my logs). I checked all the other logs and found this in the kernel logs. I don't know if it has any significance
kernel: [30064.700119] send sigkill to 3188 (java), adj 0, size 48551
I searched and read that it is usually a memory problem, but I am not sure how to know the exact cause.