Oracle JRE 1.8.0_45-b14
Jenkins gets started by java -jar jenkins.war
Although JavaDoc finds errors and these are displayed in the console for that build, the warnings plugin does not show them in its report.
There are five successful builds in the history before I triggerd the job again. Below i will paste some output from the console:
As you can see, there are errors but they are either ignored or not found.
As a side note, many other plugins like TASKS, CHECKSTYLE and FINDBUGS also print "Ignore new warnings since this is the first valid build" during the post build process, so maybe the root of this problem is not the warnings plugin?