[jira] [Created] (JAMES-3781) As a user I want to enforce explicit configuration

["Benoit Tellier (Jira)" <se...@james.apache.org>]

Benoit Tellier created JAMES-3781:
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             Summary: As a user I want to enforce explicit configuration
                 Key: JAMES-3781
                 URL: https://issues.apache.org/jira/browse/JAMES-3781
             Project: James Server
          Issue Type: Bug
          Components: guice
            Reporter: Benoit Tellier


This one is a fun one!

h1. The postmortem

One of my customer complained of missing emails. After investigations, we found that some emails for alice@domain.org where delivered in #private:alice:INBOX instead of #private:alice@domain.org:INBOX. We then realized that on some James servers of the cluster were configured with virtualhosting off while virtualhosting should have had been on. We then realized the configuration files were moved by an admin. The faulty James servers were not able to locate their configuration files and thus according to JAMES-2004 resorted to the default value with virtualhosting off.

Implicit configuration is nice to ease James onboarding.

But as an operator I would like to have the option to enforce explicit configuration, and have the safety associated with it.

h1. Proposal

Have a JVM property, disabled by default to fail if a configuration file is missing.

`-Djames.fail.on.missing.configuration.file`



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