# jstack(1) - man - phpman

> **TLDR:** Java stack trace tool.
>
- Print Java stack traces for all threads in a Java process:
  `jstack {{java_pid}}`
- Print mixed mode (Java/C++) stack traces for all threads in a Java process:
  `jstack -m {{java_pid}}`
- Print stack traces from Java core dump:
  `jstack {{/usr/bin/java}} {{file.core}}`

*Source: tldr-pages*

---

[jstack(1)](https://www.chedong.com/phpMan.php/man/jstack/1/markdown)                               Troubleshooting Tools                              [jstack(1)](https://www.chedong.com/phpMan.php/man/jstack/1/markdown)



## NAME
       jstack - Prints Java thread stack traces for a Java process, core file, or remote debug
       server. This command is experimental and unsupported.

## SYNOPSIS
       **jstack** [ _options_ ] _pid_

       **jstack** [ _options_ ] _executable_ _core_

       **jstack** [ _options_ ] [ _server-id_@ ] _remote-hostname-or-IP_


       _options_
              The command-line options. See Options.

       _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 the [jps(1)](https://www.chedong.com/phpMan.php/man/jps/1/markdown) command.

       _executable_
              The Java executable from which the core dump was produced.

       _core_   The core file for which the stack trace is to be printed.

       _remote-hostname-or-IP_
              The remote debug server **hostname** or **IP** address. See [jsadebugd(1)](https://www.chedong.com/phpMan.php/man/jsadebugd/1/markdown).

       _server-id_
              An optional unique ID to use when multiple debug servers are running on the same
              remote host.

## DESCRIPTION
       The **jstack** command prints Java stack traces of Java threads for a specified Java process,
       core file, or remote debug server. For each Java frame, the full class name, method name,
       byte code index (BCI), and line number, when available, are printed. With the **-m** option, the
       **jstack** command prints both Java and native frames of all threads with the program counter
       (PC). For each native frame, the closest native symbol to PC, when available, is printed. C++
       mangled names are not 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 Java Virtual Machine, you
       might need to specify the **-J-d64** option, for example: **jstack** **-J-d64** **-m** **pid**.

       _Note:_ This utility is unsupported and might not be available in future release of the JDK. In
       Windows Systems where the dbgeng.dll file is not present, Debugging Tools For Windows must be
       installed so 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 crash dump
       file was produced. For example:

### set PATH=<jdk>\jre\bin\client;%PATH%


## OPTIONS
### -F
              Force a stack dump when **jstack** [**-l**] **pid** does not respond.

### -l
              Long listing. Prints additional information about locks such as a list of owned
              **java.util.concurrent** ownable synchronizers. See the **AbstractOwnableSynchronizer** class
              description at
              <http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/locks/AbstractOwnableSynchronizer.html>

### -m
              Prints a mixed mode stack trace that has both Java and native C/C++ frames.

### -h
              Prints a help message.

### -help
              Prints a help message.

## KNOWN BUGS
       In mixed mode stack trace, the **-m** option does not work with the remote debug server.

## SEE ALSO
       • [pstack(1)](https://www.chedong.com/phpMan.php/man/pstack/1/markdown)

       • [C++filt(1)](https://www.chedong.com/phpMan.php/man/C%2B%2Bfilt/1/markdown)

       • [jps(1)](https://www.chedong.com/phpMan.php/man/jps/1/markdown)

       • [jsadebugd(1)](https://www.chedong.com/phpMan.php/man/jsadebugd/1/markdown)



JDK 8                                     21 November 2013                                 [jstack(1)](https://www.chedong.com/phpMan.php/man/jstack/1/markdown)