jstack(1) JDK Commands jstack(1)
NAME
jstack - print Java stack traces of Java threads for a specified Java
process
SYNOPSIS
Note: This command is experimental and unsupported.
jstack [options] pid
options
This represents the jstack command-line options. See Options for
the jstack Command.
pid The process ID for which the stack trace is printed. The process
must be a Java process. To get a list of Java processes running
on a machine, use either the ps command or, if the JVM processes
are not running in a separate docker instance, the jps command.
DESCRIPTION
The jstack command prints Java stack traces of Java threads for a
specified Java process. For each Java frame, the full class name, method
name, byte code index (BCI), and line number, when available, are
printed. C++ mangled names aren't demangled. To demangle C++ names, the
output of this command can be piped to c++filt. When the specified
process is running on a 64-bit JVM, you might need to specify the -J-d64
option, for example: jstack -J-d64 pid.
Note:
This command is unsupported and might not be available in future releases
of the JDK. In Windows Systems where the dbgeng.dll file isn't present,
the Debugging Tools for Windows must be installed so that these tools
work. The PATH environment variable needs to contain the location of the
jvm.dll that is used by the target process, or the location from which
the core dump file was produced.
OPTIONS FOR THE JSTACK COMMAND
-l The long listing option prints additional information about locks.
-h or -help
Prints a help message.
JDK 27.0.1 2026 jstack(1)
openjdk27-zulu 27.30.107 - Generated Tue Oct 27 08:46:11 CDT 2026