Filter out invalid JST in ReconcileDifferences #3911
Merged
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ReconcileDifferences was generating invalid jobs state transitions containing a nil Job. The scheduler was filtering these out, however the metrics code wasn't, thus leading to panics when the metrics attempted to access the job.
Rather than make the metrics code also filter these out, I've modified ReconcileDifferences so that these are never returned in the first place. Ideally we would never even create such a transition, but that would be a bigger and more invasive change.