jstack

prints Java thread stack traces for a given Java process

TLDR

Print thread dump for Java process

$ jstack [pid]

Force thread dump on hung process

$ jstack -F [pid]

Print concurrent locks info

$ jstack -l [pid]

Print mixed mode stack traces

$ jstack -m [pid]

SYNOPSIS

jstack [options] pid

DESCRIPTION

jstack prints Java thread stack traces for a given Java process. It is useful for diagnosing deadlocks, performance issues, and analyzing thread states. Part of the JDK diagnostic tools suite.

PARAMETERS

-F

Force thread dump when process is hung.

-l

Long listing with lock information.

-m

Print mixed mode (Java and native) stack traces.

-h, --help

Display help message.

CAVEATS

The target process must be running with the same user or you need root privileges. The -F option should only be used when the process is not responding.