I have Standalone Flink Cluster. When I stop the process on Task Manager, classes that were loaded as ChildFirst are not removed. After several start/stop repetitions, the metaspace exceeds the maximum value and throws OutOfMemory Metaspace.
I run servals application in one task manager. Application are different so a cannot add the JAR file to /lib folder. Restarting TaskManager after severals operation is bothersome.

Flink 1.20.0
Java 17.0.11+9

I tried change the class loader order to parent-first as the suggest in doc https://nightlies.apache.org/flink/flink-docs-release-1.20/docs/ops/debugging/debugging_classloading/ but this not helped. Even then, the classes are loaded as Child First.