happened a few times already today:
manybubbles@fluorine:/a/mw-log$ grep 'CirrusSearchLinksUpdateJob->run()' fatal.log | wc -l
518
manybubbles@fluorine:/a/mw-log$ date
Fri Nov 8 16:03:17 UTC 2013

Every one of these seems to be failing when CirrusSearch attempts to run its LinksUpdate behaviour in process with the links update hook. We should be able to make this go away by always enqueueing the job rather than executing it in process if PHP_SAPI is cli.

Change 95086 had a related patch set uploaded by Manybubbles:
Always fork Cirrus LinksUpdate behavior

https://gerrit.wikimedia.org/r/95086

Change 95086 merged by jenkins-bot:
Always fork Cirrus LinksUpdate behavior

https://gerrit.wikimedia.org/r/95086