It seems I found a bug in JBoss Scheduler plugin:
JMX-managed method "void startSchedule()" is not really JMX because of the following malformed xdoclet tag:
varia\src\main\org\jboss\varia\scheduler\Scheduler.java, line 210
This bug is present in sources version 3.0.3 and also in jboss-head. I don't have sources version 3.0.4, but the bug is still there.
Possibly I have to report about it somewhere else?
Fixed in the latest branches.
There was a similar problem in ScheduleManager.
Not sure what use these methods are?