Problem

Error in logs:

dagster._core.errors.DagsterUserCodeUnreachableError: Could not reach the user code server. gRPC Error code: UNAVAILABLE

Possible cause

This error means that the process trying to connect to the user code was unable to do so. This could be due to any number of reasons depending on your deployment setup.

Since the executing jobs don't communicate with the user code server, the UNAVAILABLE error will not cause job failures, but the cause of the UNAVAILABLE error could also cause jobs to fail.

Solution

To address this issue, you will need to use the debugging tools for your particular deployment type to determine why the processes are failing.