AWS DevOps Engineer Professional DOP-C01 – Question484

You are running a Docker daemon on a Linux host and it becomes unresponsive. Which signal, when sent to a Docker process with the kill command, forces the full stack trace to be logged for debugging purposes?

A. TRACE
B. IOTRACE
C. -SIGUSER1
D. KILLTRACE

Correct Answer: C

Explanation:

Explanation:
If the daemon is unresponsive, you can force a full stack trace to be logged by sending a SIGUSR1 signal to the daemon.
Linux:
$ sudo kill -SIGUSR1 $(pidof dockerd)
Windows Server:
Download docker-signal.
Run the executable with the flag –pid=.
Reference:
https://docs.docker.com/engine/admin/#force-a-stack-trace-to-be-logged