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Signals

On Unix systems, the NATS server responds to the following signals:

Signal

Result

SIGKILL

Kills the process immediately

SIGINT

Stops the server gracefully

SIGUSR1

Reopens the log file for log rotation

SIGHUP

Reloads server configuration file

SIGUSR2

Stops the server after evicting all clients (lame duck mode)

The nats-server binary can be used to send these signals to running NATS servers using the -sl flag:

# Quit the server
nats-server --signal quit
​
# Stop the server
nats-server --signal stop
​
# Reopen log file for log rotation
nats-server --signal reopen
​
# Reload server configuration
nats-server --signal reload
​
# Lame duck mode server configuration
nats-server --signal ldm

If there are multiple nats-server processes running, or if pgrep isn't available, you must either specify a PID or the absolute path to a PID file:

nats-server --signal stop=<pid>
nats-server --signal stop=/path/to/pidfile

See the Windows Service section for information on signaling the NATS server on Windows.

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