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Debugging against jmeter

Inside jmeter startup script, add:
set DEBUGJDWP=-agentlib:jdwp=transport=dt_socket,address=localhost:9009,server=y,suspend=y
set ARGS=%DUMP% %HEAP% %NEW% %SURVIVOR% %TENURING% %EVACUATION% %RMIGC% %PERM% %DDRAW% %DEBUGJDWP%
Now start jmeter. It will hang and wait for debugger.

In eclipse, add a new remote java application debug configuration. Add jmeter source code to it. Connect. Jmeter will start now.

Attach jmeter source code. Lookup class:
org.apache.jmeter.engine.StandardJMeterEngine
Set debug point in runTest() method and start your script.

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