#33152: Document the fact that a DB connection can be closed mid-request when a
HTTP client disconnects prematurely
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Reporter: Rich | Owner: nobody
Type: Uncategorized | Status: new
Component: Documentation | Version: 3.2
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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I've described and diagnosed an issue that has caused me headaches for
some weeks here:
https://forum.djangoproject.com/t/db-connection-closed-by-uwsgi-in-the-
middle-of-handling-a-request/9875
This took a lot of effort to investigate, and I'd like to avoid others
having to do the same.
I think the official doc needs to explain that a HTTP response can be
closed **DURING** the handling of a request - when this happens, seemingly
random django.db.utils.InterfaceErrors can be thrown.
These are very difficult to debug because of the way the
HttpResponse.close() code has run asynchronously and invisibly.
It may be that the Django code could also benefit from some changes...the
HTTP client closing the connection early is after all within the scope of
'normal' behaviour - right now quite what happens depends on whether a
transaction is in effect or not, as well as other, essentially arbitrary
settings. Some sort of normalised behaviour would be great, but I don't
see how to implement it without setting some sort of global flag on close
which is regularly checked somewhere...
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Ticket URL: <https://code.djangoproject.com/ticket/33152>
Django <https://code.djangoproject.com/>
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