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The "HowToDebug" page has been changed by DaveBrosius: http://wiki.apache.org/cassandra/HowToDebug?action=diff&rev1=3&rev2=4 2. Put the following parameters in the VM args section {{{ - -ea -javaagent:${project_loc}/lib/jamm-0.2.5.jar -XX:+UseThreadPriorities -XX:ThreadPriorityPolicy=42 -Xms752M -Xmx752M -Xmn188M -XX:+HeapDumpOnOutOfMemoryError -Xss128k -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:SurvivorRatio=8 -XX:MaxTenuringThreshold=1 -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -Djava.net.preferIPv4Stack=true -Dcom.sun.management.jmxremote.port=7199 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Dlog4j.configuration=log4j-server.properties -Dlog4j.defaultInitOverride=true + -ea -javaagent:${project_loc}/lib/jamm-0.2.5.jar + -XX:+UseThreadPriorities + -XX:ThreadPriorityPolicy=42 + -Xms752M + -Xmx752M + -Xmn188M + -XX:+HeapDumpOnOutOfMemoryError + -Xss128k + -XX:+UseParNewGC + -XX:+UseConcMarkSweepGC + -XX:+CMSParallelRemarkEnabled + -XX:SurvivorRatio=8 + -XX:MaxTenuringThreshold=1 + -XX:CMSInitiatingOccupancyFraction=75 + -XX:+UseCMSInitiatingOccupancyOnly + -Djava.net.preferIPv4Stack=true + -Dcom.sun.management.jmxremote.port=7199 + -Dcom.sun.management.jmxremote.ssl=false + -Dcom.sun.management.jmxremote.authenticate=false + -Dlog4j.configuration=log4j-server.properties + -Dlog4j.defaultInitOverride=true }}} 2. Add the directory ./conf to your debugging user class path
