Can't pipe to `head`

[mohd-akram]

Expected behavior

mqtt sub exits once head exits. The CLI should exit on SIGPIPE.

Actual behavior

mqtt sub keeps running despite SIGPIPE.

To Reproduce

Steps

1. Run mqtt sub -V 3 -h example.com -t topic | head -n1

Details

• Affected MQTT CLI version(s):
• Used JVM version:

4.7.4
Picocli 4.6.2
JVM: 11.0.14.1 (Red Hat, Inc. OpenJDK 64-Bit Server VM 11.0.14.1+1)
OS: Linux 5.16.9-200.fc35.x86_64 amd64