I am working on integration tests for my project and using Maven as the build system. In the pre-integration-test phase, I spin up a containerized database (using the 23.7.0.0-lite-amd64 version from https://container-registry.oracle.com/ords/ocr/ba/database/free) and shut it down during post-integration-test. This is working as expected so that the build is able to start and stop the container cleanly. I am running a commercial tool that automates the database schema creation. On my MacBook Pro (Intel i9, 32GB) I am running Rancher Desktop 1.18.2 and seeing behavior I cannot explain. When I first start the computer and Rancher Desktop, the schema creation tool connects successfully to the container database, the schema is created, and the tests run successfully. After some builds, the schema creation tool gives me an error saying “invalid username/password”. Without changing anything, I simply do

rdctl shutdown

followed by

rdctl start

and the build starts working again. After a few more builds, the cycle repeats itself and I have to restart Rancher Desktop to get the build working again. Any thoughts on how to track down this problem?

The "invalid username/password" error is unlikely to come from Rancher Desktop but from your schema creation tool. I have no idea how to debug that part, as I don't even know what tool it is.

well…. the tool’s error message might be misleading but it is unable to connect to the database

Does

rdctl shell

still work?

then it starts failing and restarting RD eliminates the problem

I wonder if it is maybe failing due to memory pressure; did you try giving the VM more memory and see if it runs for longer that way?

that is something I can try. However, there is only either 0 or 1 container running

That may not be enough depending on your application. It may consume too much memory and the Linux out-of-memory killer may start killing random processes which in turn breaks the base functionality. Worth trying to use more

ok