ways how to get heap dump from running tomcat 7

java tomcat7 heap-dump
emdhie picture emdhie · Nov 27, 2013 · Viewed 48.8k times · Source

I've tried this Get a heapdump on JVM from Tomcat 6 but it doesn't work for me, Is there other ways to get heap dump from tomcat server? Thanks in advance!

Answer

Taky picture Taky · Nov 27, 2013

The easiest way to get heap dump is to use jmap. On the machine with java process execute jmap command. Example of usage:

jmap -dump:file=/mnt/heapdump_2013-04-01.data 29842

use jps to know java Pid.

Also you can make heap dump via jvisualvm. You can connect to the remote machine via jmx or jstatd. You can make heapdump and store on the remote machine.

To analyze heapdumps can advice you: MAT. Very powerful tool which allow you to quickly understand problems. You can find here good inro to the MAT.

If you don't want to stop application for a long time you can make binary dump(You can use gcore or gdb). And you can use jmap to analyze gdb dump. More information you can read on the atlassian blog. Beware of some issues.

Related questions

Tomcat 7 "SEVERE: A child container failed during start"

Basically, I've written a springMVC application (with a relatively shotgun my way first-timer approach with regards to Spring). The project works fine on Tomcat 6. My Tomcat server doesn't start and throws the following exception: Apr 29, 2012 3:41:00 PM org.apache.catalina.core.…

Read More
java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver

I wrote a Java Servlet program but when I run it, it was showing the Exception java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver My code is package skypark; import java.io.*; import javax.servlet.*; import java.text.*; import javax.servlet.…

Read More
Tomcat 7: How to set initial heap size correctly?

I was trying to adjust initial heap size of a tomcat 7 (CentOS, java -version: 1.6.0_25-b06) instance by adding the following line to catalina.sh: export CATALINA_OPTS="-Xms=512M -Xmx=1024M" Starting up tomcat fails and logs the following message …

Read More