JVM dumps and system dumps provide detailed information about the internal status of an IBM JVM, and the configuration of a running CICS® Transaction Gateway.
JVM dumps provide a snapshot of a Java Runtime Environment (JRE). System dumps provide a snapshot of the JRE at a process level and also provide diagnostic information regarding the system status and configuration.
For more information, see Dumping diagnostic information.
With some Java™ Virtual Machines (JVMs) on UNIX and Linux you can force Java to write a stack dump showing the states of the current threads.
For example, on IBM® JVMs, you can send a SIGQUIT (-3) signal to a Java process to make it write a stack dump to stderr. This shows the states of the current threads. Do not do this on a working production system but only on a system which is completely locked.