How to Analyze Information from a Java Core Dump

How to analyze a large core dump generated when JVM crashes

It seems that this core file is not for Java-related tools like Eclipse MAT tool or IBM Thread and Monitor Dump Analyzer for Java. The tools for the core file are gdb or pmap, pstack. I thought I can debug why application crashes JVM, but the core file seems to have little information about application-level things.

Java, get core dump

The easy way to do this kind of thing is to attach an interactive debugger to the JVM, pause it, and use the debugger to look at the stacks, etc.

Java 8 mdmp dump file analyzing with jvisualvm Add VM Coredump grayed / blanked out

You must be on Solaris or Linux to access the VisualVM Coredumps option.

In the documentation (http://visualvm.java.net/coredumps.html) it says:

The Core Dump node is visible in the Applications window if VisualVM is running on Solaris or Linux. Generally, VisualVM can only open a core dump if the core dump was taken on the same machine. A core dump contains informaton on the Java Development Kit (JDK) and kernel of the machine where the core dump was taken. To open the core dump in VisualVM, this information must match the JDK software and kernel of the local system.

Analysis jvm core file?

Like @SMA suggests, the hs_err{pid} file will have most of the things you need (or can make use of)

IMGO The core dump isn't useful unless you have a debug build of the JVM e.g. you built the OpenJDK for DEBUG.

---

Related Topics