Springle added a comment.

No smoking gun yet.

As discussed a few times on labs-l in order fight abuse and replag we kill 
things explicitly when:

1. A query runs for more that 28800 seconds
2. One or more queries are about to collectively cause an OOM (rare)
3. A client holds a connection open and **idle** for more than 60 seconds
4. The CATSCAN stuff runs slow writes for more than 300 seconds

I wonder if #3 is the culprit here.

60s was chosen because some users leave transactions open for long periods 
and/or consume many concurrent connections for no good reason. If this is the 
problem, we can either bump up the time limit or encourage apps to 
auto-reconnect, use keep-alive, or just close them.


TASK DETAIL
  https://phabricator.wikimedia.org/T76699

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To: Springle
Cc: Aklapper, Magnus, Husky, coren, Lokal_Profil, Steinsplitter, Danilo, 
Springle, Wikidata-bugs, aude, jayvdb, scfc



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