I am having the problem that Javadoc publishing fails after the first successful build. That is, build #1 succeeds and publishes Javadoc, but build #2 onwards fails with the following error:

ERROR: No javadoc found in C:\Program Files\Hudson\jobs\FLTools\workspace\docs/api/html: null

I found however that after deleting the published Javadoc directory, C:\Program Files\Hudson\jobs\FLTools\javadoc, the build succeeds again. Therefore, it looks like Hudson is having problems overwriting previously published Javadoc.