|Happy Cloud Debugging|
The codes above denote the Cloud Foundry component emitting the log entry. You can find a list of those component identifiers in the Cloud Foundry documentation or in the IBM Cloud (Bluemix) documentation on Log Sources. There are many component names. I found that remembering the following helps a lot:
- RTR: This is the router which channels HTTP requests to an app. Here you find information about the request itself including client information.
- STG: The staging phase has details about the deployment and restaging of an app. They help with initial errors.
- APP: If your app writes information to stderr or stdout, then you will find it here. For some apps this could be the well-known "printf debugging".