Thursday, July 16, 2009

Quick steps to get heap dumps in glassfish app Server.

Step-1: export JAVA_HOME=
change ports in setup.xml if required.

Step-2: cd /glassfish

Step-3: chmod -R 777 ./lib

Step-4: ./lib/ant/bin/ant -f setup.xml

Step-5: ./bin/asadmin start-domain domain1
Get pid for the server process.

Step-6: Run following commands.

bash-3.00# kill -3 12617 if 12617 is the pid

bash-3.00# jmap -dump:format=b,file=/tmp/java_app-heap.bin 12617
Dumping heap to /tmp/java_app-heap.bin ...
Heap dump file created

bash-3.00# jhat -J-Xmx326m /tmp/java_app-heap.bin
Reading from /tmp/java_app-heap.bin...
Dump file created Thu Jul 16 20:18:55 PDT 2009
Snapshot read, resolving...
Resolving 1202039 objects...
Chasing references, expect 240 dots................................................................................................................................................................................................................................................
Eliminating duplicate references................................................................................................................................................................................................................................................
Snapshot resolved.
Started HTTP server on port 7000
Server is ready.

Step-7: Access heap by browsing http://host:7000/
at

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