1. The ID should ideally be from external system so that it is possible to always locate the records by ID known to the user. Let's say I am support and I want

1. The ID should ideally be from external system so that it is possible to always locate the records by ID known to the user. Let's say I am support and I want to figure out what happened, the user gives me the ID and I can use it to find the logs for this unique transaction, even if the user did not get any response. 2. Well, it is ok to log the error when it crosses component boundaries, this is basically what you do when you log an error before returning it from your service to another service. Ideally, there would be some coding guidelines that would enforce rather uniform error logging. We are enforcing this on code review.