Inside Java
News and views from members of the Java team at Oracle
News and views from members of the Java team at Oracle
The Java tool jcmd ("j command") sends diagnostic commands to the JVM, which will react by supplying the desired information: from finalizer queues to heap and thread dumps, from GC insights to virtual thread scheduler statistics. At the moment, this requires a running JVM, but once candidate JEP 528 is adopted, a lot of that information can be seamlessly extracted from a crashed JVM's core dump, allowing easy post-mortem analysis.
Links:
jcmd documentation: https://docs.oracle.com/en/java/javase/26/docs/specs/man/jcmd.html
JEP 528: https://openjdk.org/jeps/528
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Inside.java : News and views from members of the Java team at Oracle
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