Hi Juerg, I thought I replied on a similar email you sent to dev@sling, but I can't find it anymore ... Anyway, reply below
On Fri, 2021-02-26 at 11:00 +0100, JCR wrote: > > I run Eclipse 2020-03 and Sling 11. When trying to start the server > > in > > debug mode in Eclipse, I get more often than not a 404 and Eclipse > > wouldn't connect: > > > > > org.apache.commons.httpclient.HttpException: Got status code 404 > > for call to > > http://localhost:8080/system/sling/tooling/sourceReferences.json > > > > Checking the repo, there is really nothing there at that location > > (not > > surprising). But strange enough, it sometimes connects in debug mode > > despite this missing entry, so I really wonder... > > > > What is missing there and how can it be fixed? The IDE tooling is supposed to automatically install the 'Tooling Support Source' bundle for this functionality to work. Can you try manually downloading it from https://sling.apache.org/downloads.cgi and installing it in your Sling instance? Thanks, Robert