Possible Duplicate:
Reputation display bug… Again

On Apr 17, I got a couple of upvotes on a question and answer posted to Gaming SE, as seen on my reputation history on that site (sorted by time):

Gaming reputation history

I answered the question myself, and on Apr 17 someone upvoted both the question and answer at the same time, which is what the circled +5 and +10 corresponds to. As you can see, this screenshot shows my entire history on the site, and shows the correctly total reputation of 151 (I added it up to confirm).

My SE accounts list agrees:

SE accounts summary

And so does my accounts summary on Gaming SE:

Gaming SE accounts summary

The inconsistency is in the accounts summary of every other SE site besides Gaming. For example, here's what my accounts summary on StackOverflow shows:

SO accounts summary

All my other non-Gaming sites on the network also show "146" here. I didn't do a careful examination, but from a quick examination, it appears like this is the only inconsistency (the other accounts are shown with the correct reps on all sites).

I thought at first that this might just be caching (even though 2 days is kind of a long time for a cache of this sort). But if that were the case I would expect the stale cache to show "136" (assuming a relatively naive caching strategy), since I got 15 points within seconds of each other on Apr 15, and I had 136 rep before that. So the fact that it shows "146" leads me to believe it may be indicative of some other problem. Or even if it is just a stale cache (showing 146 because question rep and answer rep are refreshed differently?), two days seems to be a long time to cache this. Furthermore, the inconsistency only exists in some places, not others.

  • 7
    It's caching, it's always caching. – yannis Apr 19 '12 at 20:42
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    [status-caching] – user102937 Apr 19 '12 at 20:46
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    @YahooAnswersenthusiast, Hmm, even for two days? If it's caching, that seems almost like a cache-refresh bug then. – Ben Lee Apr 19 '12 at 20:47
  • @BenLee 4 days would be my (educated) guess. Now stop checking out your rep, it'll sync in a couple of days... – yannis Apr 19 '12 at 20:49
  • @YahooAnswersenthusiast, I only noticed this by accident, not like I was actively checking out my rep :). By yeah, i'll give it a few days and come back if it's still inconsistent. – Ben Lee Apr 19 '12 at 20:51
  • @BenLee Wasn't accusing you, but I know how hard it is to stop checking it out once you first notice that there's something not entirely correct in there... It's how they keep us addicted ;) – yannis Apr 19 '12 at 20:53
  • @YahooAnswersenthusiast, and for the record, it's not always caching, as my very first question on meta indicates: meta.stackexchange.com/questions/107027/… (another reputation display bug there, turned out to actually be a bug) – Ben Lee Apr 19 '12 at 21:01
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    @BenLee Caching being the answer to all bugs, and 6 to 8 weeks the answer to all feature requests is a MSO meme... ;) It just happens that this time it's (probably) the correct answer too. – yannis Apr 19 '12 at 21:04
  • @YahooAnswersenthusiast, approching 5 days and the problem is still there -- still think it's caching? – Ben Lee Apr 21 '12 at 22:38
  • I think it's time for a bounty. My money is on it's an actual bug. After all, cache invalidation is one of the only two hard things in computer science, right? ;) martinfowler.com/bliki/TwoHardThings.html – Ben Lee Apr 21 '12 at 22:54
  • @Ben - There's a difference between simple caching (which fixes itself) and network-level denormalization that can get out of sync :) – Nick Craver Apr 22 '12 at 2:42
  • @NickCraver, wouldn't an out-of-sync network-level denormalization (that doesn't fix itself) be considered a bug? I would consider it so anyway. – Ben Lee Apr 22 '12 at 4:38
  • Honestly, I really don't understand the all the down votes here. How is this not a legitimate bug? It's been 6 days, and the cache has not been invalidated. That sounds like something went wrong, not just like a normal cache TTL. – Ben Lee Apr 22 '12 at 9:13
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    @BenLee - ...because it's not a simple cache, far far from it, and the downvotes are probably because this is a dupe of over a dozen other meta reports. – Nick Craver Apr 22 '12 at 10:04
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    As @NickCraver said, this has happened before. When I had a related problem, the official response was Our network-level user cache had a hiccup. See: 10 rep missing intermittently from account overview – Dennis Apr 28 '12 at 3:55

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