I've been seeing a problem for some time now where jobs in the queue will
not get run or removed from the job table. The showJobs and runJobs scripts
don't seem to find them but the do show in the job table and the only way
to remove them is manually with delete (or truncate) statements. The job
type varies, sometimes SMW\UpdateJob, sometimes refreshLinks, etc. I have
five wikis but it only seems to happen on three of them since the other two
have very low write activity. They are all currently MediaWiki 1.23.2 and
Semantic MediaWiki 2.0.
Please let me know if there are any known bugs I should look into as the
possible culprits (I've yet to see any that seem to match this issue) and
whether there is any more information I can provide to help troubleshoot
this.