[Bug] Docker signal handling not working

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• I searched in the issues and found nothing similar.

Version

iotdb 1.3.1-standalone

Describe the bug and provide the minimal reproduce step

When stoping a docker container running the apache/iotdb:1.3.1-standalone image the SIGTERM signal handling trap is not executed leading to a non graceful shut down. This is because the entrypoint.sh script uses exec which destroys signal handlers using trap.

Furthermore, the function that should be executed at SIGTERM 'on_stop' defined in entrypoint.sh has the if statement "$start_what" != "all".` Therfore in standalone mode the corresponding graceful shutdown is not executed.

To reproduce run the docker container and then stop it.

What did you expect to see?

The on_stop function defined in entrypoint.sh is executed when the docker container is stopped providing a graceful shutdown with FLUSH.

What did you see instead?

Rapid shut down without proper SIGNAL handling and without execution of the on_stop function.

Anything else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!

Commencez par lire entrypoint.sh, en particulier l’utilisation de exec et la fonction on_stop. Exécutez l’image Docker autonome et arrêtez le conteneur pour reproduire le comportement de gestion des signaux. Le travail est considéré comme terminé lorsque l’arrêt du conteneur invoque on_stop et effectue l’arrêt gracieux attendu avec FLUSH.