After enabling the Poll SCM checkbox and setting the Schedule to "*/5 * * * *" in a SVN build job, Jenkins repeatedly builds the application every 5 minutes even when no source code changes have been made. This happens because there is a double forwardslash (e.g. //) somewhere in the Subversion Repository URL.
The source code is retrieved even though the URL is invalid and the job builds in an endless loop.
Remove the double forwardslash from the Subversion Repository URL.