Comments - How to troubleshoot: ERROR 1296 (HY000): Got error 122 'Cannot retrieve error message' from CONNECT
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Hi, I had same kind of issue. Problem solved by replacing, JavaWrappers.jar and JdbcInterface.jar to /usr/lib/mysql/plugin path on MariaDB 10.3 official docker image which is based on Ubuntu 18.04 LTS bionic.
So, no need to change connect_work_size every time..
Here I will attach my git hub code sample, (you can take correct jars from there) https://github.com/pk-gt/MariaDB-10.3-Connect-Engine-Docker
Also read the medium article with installation details, https://medium.com/@prabuddha.kulatunga/install-mariadb-connect-engine-on-docker-with-dremio-vds-jdbc-connect-table-support-c969f7c97c90
May be these things will helpful for someone..