Javadumps are an internally generated and formatted analysis of the JVM, giving information that includes the Java™ threads present, the classes loaded, and heap statistics.
An example of producing a Javadump when a class is loaded is shown below.
java -Xgcpolicy:metronome -Xdump:java:events=load,filter=java/lang/String -version JVMDUMP006I Processing dump event "load", detail "java/lang/String" - please wait. JVMDUMP007I JVM Requesting Java dump using '/home/user/javacore.20090602.094449.274632.0001.txt' JVMDUMP010I Java dump written to /home/user/javacore.20090602.094449.274632.0001.txt JVMDUMP013I Processed dump event "load", detail "java/lang/String".
See Using Javadump for more information about analyzing a Javadump.