I got cron mail about a run that was relying on the august 10th files, presumably writing to output files with day August 11th and that had been cleaned up because these jobs should finish in the same day.
On the snapshot host where these run, there were several old processes; I shot them. The current run seems hung on commonswiki; a look at an earlier run shows that the commonswiki job should complete in about a minute but it's been several hours now.
This is likely related to T260232