nifi.sensitive.props.key is cleared upon restart

Summary

After pulling registry1.dso.mil/ironbank/opensource/apache/nifi:1.15.2, running, then restarting, the nifi.sensitive.props.key value that was randomly generated during the run is cleared by the restart

Steps to reproduce

$ docker pull registry1.dso.mil/ironbank/opensource/apache/nifi:1.15.2
$ docker run --name nifi -p 8443:8443 -d registry1.dso.mil/ironbank/opensource/apache/nifi:1.15.2
$ docker ps -a
CONTAINER ID   IMAGE                                                              COMMAND                  CREATED         STATUS                             PORTS                                                   NAMES
2f79d86fdb79   registry1.dso.mil/ironbank/opensource/apache/nifi:1.15.2           "../scripts/start.sh"    9 seconds ago   Up 11 seconds (health: starting)   8000/tcp, 8080/tcp, 10000/tcp, 0.0.0.0:8443->8443/tcp   nifi
$ docker ps -a
CONTAINER ID   IMAGE                                                              COMMAND                  CREATED              STATUS                        PORTS                                                   NAMES
2f79d86fdb79   registry1.dso.mil/ironbank/opensource/apache/nifi:1.15.2           "../scripts/start.sh"    About a minute ago   Up About a minute (healthy)   8000/tcp, 8080/tcp, 10000/tcp, 0.0.0.0:8443->8443/tcp   nifi
$ docker restart nifi
$ docker ps -a
CONTAINER ID   IMAGE                                                              COMMAND                  CREATED         STATUS                      PORTS                                      NAMES
2f79d86fdb79   registry1.dso.mil/ironbank/opensource/apache/nifi:1.15.2           "../scripts/start.sh"    2 minutes ago   Exited (0) 12 seconds ago                                              nifi

What is the current bug behavior?

as shown above, nifi container won't restart and stay up
this might be due to the nifi.sensitive.props.key value
after the initial successful run, docker cp of nifi.properties shows the randomly generated key
after the restart, docker cp of nifi.properties shows that the nifi.sensitive.props.key value is gone

What is the expected correct behavior?

nifi will restart fully and continue to run

Relevant logs and/or screenshots

(Paste any relevant logs - please use code blocks (```) to format console output, logs, and code as it's very hard to read otherwise.)

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)

Tasks

• Bug has been identified and corrected within the container