jhsdb
java HotSpot Serviceability Agent debugger
TLDR
Attach debugger to process
$ jhsdb clhsdb --pid [pid]
Analyze core dump$ jhsdb hsdb --core [core] --exe [java]
Print Java stack traces$ jhsdb jstack --pid [pid]
Heap analysis$ jhsdb jmap --pid [pid] --heap
Mixed stack traces$ jhsdb jstack --mixed --pid [pid]
Launch GUI debugger$ jhsdb hsdb --pid [pid]
SYNOPSIS
jhsdb command [options]
DESCRIPTION
jhsdb is the Java HotSpot Serviceability Agent debugger. It analyzes JVM processes and core dumps.
The tool provides low-level JVM debugging capabilities. It can inspect heap, stack, and internal structures.
PARAMETERS
clhsdb
Command-line HotSpot debugger.hsdb
GUI HotSpot debugger.jstack
Print stack traces.jmap
Memory map tool.jinfo
Configuration info.--pid PID
Target process ID.--core FILE
Core dump file.--help
Display help information.
CAVEATS
Part of JDK. Requires same JDK version as target. May need symbols for full analysis.
HISTORY
jhsdb was introduced in JDK 9 as a unified tool replacing separate serviceability agent commands.