Polling failed with EngineError: Response code 500 (Internal Server Error); Error: An exception occurred in the persistence layer

Hello,

I was trying to execute external task, which usually works fine all the time.
but the other day i started getting all of a sudden an exception on executing the tasks.

Error: polling failed with EngineError: Response code 500 (Internal Server Error); Error: An exception occurred in the persistence layer. Please check the server logs for a detailed message and the entire exception stack trace.; Type: ProcessEngineException; Code: undefined

The issue appeared to be the same as This bug

Even though i use a different JDK version, my camunda is version 7.15.0, its hosted inside docker on linux env.
with JDK version:
openjdk version “11.0.9” 2020-10-20
OpenJDK Runtime Environment (build 11.0.9+11-alpine-r1)
OpenJDK 64-Bit Server VM (build 11.0.9+11-alpine-r1, mixed mode)

Any idea if these versions also have an issue?

Best regards,
Hadi Hoteit