Profile Tomcat Application With VisualVM
Tomcat6VisualvmTomcat6 Problem Overview
I would like to profile an application that runs on Tomcat with the VisualVM tool. Unfortunately, when I tell VisualVM to profile Tomcat, Tomcat prints out a couple of messages indicating it is connecting to a profile tool and then simply exits.
Details…
I am using Windows XP, Tomcat 6, VisualVM 1.2.1, and JDK 1.6.0_11.
- In Visual VM, I right-click on the Tomcat Application and select “Profile”
- In the Profiler Tab, I press the Memory button (or the CPU button).
- Tomcat exits
Note that if I right-click on the Tomcat Application and select “Heap Dump” that seems to work OK.
Tomcat6 Solutions
Solution 1 - Tomcat6
I have VisualVM
profiling working with my Tomcat
application now. I needed to add the following parameters to the tomcat startup:
-Dcom.sun.management.jmxremote.port=8086
-Dcom.sun.management.jmxremote.ssl=false
-Dcom.sun.management.jmxremote.authenticate=false
Here is a nice article on monitoring Tomcat
with VisualVM
.
Solution 2 - Tomcat6
Yes we do profile Tomcat applications.
Go to catalina.bat
or catalina.sh
and this to your JAVA_OPTS
(I am using Tomcat 6.0.16):
-Dcom.sun.management.jmxremote=true -Dcom.sun.management.jmxremote.port=9090 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false
Your JAVA_OPTS
should look like
set JAVA_OPTS=%JAVA_OPTS% -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.util.logging.config.file="%CATALINA_BASE%\conf\logging.properties" -Dcom.sun.management.jmxremote=true -Dcom.sun.management.jmxremote.port=9090 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false
Updated after Ryan comment that it is better to use setenv.sh
. This is my setenv.sh
for JDK 8. Missing few other settings but good to start with.
SUN_JVM_OPTS="
-server \
-XX:MaxMetaspaceSize=3G \
-XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled \
-XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70 \
-XX:+ScavengeBeforeFullGC -XX:+CMSScavengeBeforeRemark \
-XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=3 -XX:GCLogFileSize=2M \
-XX:+HeapDumpOnOutOfMemoryError \
-Dsun.net.inetaddr.ttl=60 \
-Dcom.sun.management.jmxremote \
-Dcom.sun.management.jmxremote.port=8480 \
-Dcom.sun.management.jmxremote.authenticate=false \
-Dcom.sun.management.jmxremote.ssl=false"
# Set custom application options here
APPLICATION_OPTS="-Dlog4j.configurationFile=patht-to-log/log4j2.xml -Dlog4j.debug=true "
JVM_OPTS="$GENERAL_JVM_OPTS $SUN_JVM_OPTS"
CATALINA_OPTS="$JVM_OPTS $APPLICATION_OPTS"
echo "Tomcat started with settings "$CATALINA_OPTS
Once you drop the setenv.sh
in bin directory, you can see the changes in console on startup.
Here's another step by step tutorial to profile Tomcat applications with Visual VM: Trouble shooting application performance with Visual VM
Solution 3 - Tomcat6
I am using Tomcat 7 and the full configuration reqires more parameters to work.
-Dcom.sun.management.jmxremote=true
-Dcom.sun.management.jmxremote.port=9090 # port to connect JMX
-Dcom.sun.management.jmxremote.ssl=false
-Dcom.sun.management.jmxremote.authenticate=false
-Djava.rmi.server.hostname=50.112.22.47" # IP of the server running tomcat (it is necessary)
source: http://blog.markshead.com/1129/connecting-visual-vm-to-tomcat-7/
Solution 4 - Tomcat6
All you need to do it set these VM options:
> -XX:+UnlockCommercialFeatures -XX:+FlightRecorder -XX:+UnlockDiagnosticVMOptions -XX:+DebugNonSafepoints -XX:FlightRecorderOptions=stackdepth=512