Play sbt wraps so you can use the sbt set logLevel in compile := Level.Debug in the playback console to set the logging level. Source: Configuring and Using Logging
A controller change may be triggered by the route compiler, for which it will be necessary to reconfigure the return routes, and then, possibly, something using these return routes. I'm not sure about the details, but I can almost guarantee that the route compiler is associated with most bulk recompilations.
Michael zajac
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