[SPARK-28627] properties file via SPARK_CONF_DIR and --properties-file prevents definition of own properties via secrets/own mounts

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 2.4.3
• Component/s: Kubernetes, Spark Core
• Assignee: Unassigned
• Reporter: Roland Johann
• Created: 05/Aug/19 15:58
• Updated: 12/Dec/22 18:10
• Resolved: 12/Aug/19 08:31

Description

K8S resource manager dumps the config map to /opt/spark/conf/spark-defaults.conf and passes it to spark submit twice:

• via env var SPARK_CONF_DIR
• argument --properties-file

This prevents definition if user defined properties, such as from secrets - currently it seems to be the only possibility to define spark config properties from secrets but is locked currently.

Is this implementation intent? If yes, what are the reasons behind this decision?