Upstream marked this as fixed in 2.2.28, which is from the Ubuntu
precise timeframe. Trusty already ships 2.4.7, so marking this fix
released.
** Changed in: apache2 (Ubuntu)
Status: Confirmed => Fix Released
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related upstream bug:
https://issues.apache.org/bugzilla/show_bug.cgi?id=41270
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Server Team, which is subscribed to apache2 in Ubuntu.
https://bugs.launchpad.net/bugs/134274
Title:
TCP_DEFER_ACCEPT causes random HTTP
This exact problem causes havoc if you have many slow clients on slow
networks (gprs).
We actually had this problem, and to confirm #8. its *really* hard to
catch. We actually had a 80% unsuccessfull connection attemps.
I cannot believe Apache ships with TCP_DEFER_ACCEPT on 1 sec, or even
Unfortunately upstream cannot agree on what precisely the standards
require in relation to TCP_DEFER_ACCEPT, thus this issue slips through
the cracks and doesn't affect enough installations to create any real
drive.
As can be seem from my investigations it is an obscure bug which is very
hard to
This is a pretty old bug, and doesn't seem to have been linked to any
upstream issue, even though it is likely just that. Has anyone verified
that the behavior persists on a more recent release of Ubuntu?
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When TCP_DEFER_ACCEPT is enabled on the listening socket:
- HTTP-Keep-Alive requests get a boost;
- non-HTTP-Keep-Alive requests are delayed after a while.
The problem happens with high concurrencies only.
This has been tested with various HTTP servers and is a consistant
behavior on Linux
Please do not change the status of a confirmed/triaged bug that
describes a known issue that is as yet unresolved.
** Changed in: apache2 (Ubuntu)
Status: Invalid = Triaged
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TCP_DEFER_ACCEPT causes random HTTP connection failures in load-balanced
web-server farms
