Tasks should clean up after themselves when SoftTimeLimitExceeded exception is raised.
If not a report (=task) will appear on the database with status STARTED when in fact will never complete, as it was cancelled (for taking too much time)
This is happening right now with PagesCreated and NamespaceCreated for enwiki
|1791117||2014-10-21 00:00:00||enwiki - PagesCreated||STARTED|
|1791122||2014-10-22 00:00:00||enwiki - PagesCreated||STARTED|
In the code we are handling properly reports left in stage "PENDING" but not started (which indicate that report could not even start really)