Scala: print a stack trace in my Scalatra app

I think you want printStackTrace() rather than getStackTrace. If you are outputting to a log file, getMessage() may be helpful. Or you may try passing the whole exception object to the logger.

Use ExceptionUtils from Apache Commons Lang:

import org.apache.commons.lang3.exception.ExceptionUtils
(...)
logger.info("an exception occurred: " + ExceptionUtils.getStackTrace(e))