Docker NiFi Image 1.19 environment variables not supporting hyphens

[#1]

Hi there,

Maybe someone can help out/explain the following. We just moved our NiFi dev clusters from docker image 1.13 to 1.19 and noticed that when setting environment variables in the docker run, variables with a hyphen "-" doesn't get set. After we login on the docker container, we don't see these variables when doing a printenv.

Sample below doesn't get set

NIFIFLOW_server-1_cluster=http://someurl 
But this does
NIFIFLOW_server_1_cluster=http://someurl

Is this due to the eclipse-temurin base image? Any help is much appreciated.

Thank you, regards,

Dave