Delayed response results in 500 error [rt.cpan.org #101072] #33
Description
Migrated from rt.cpan.org#101072 (status was 'new')
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From bitcard.9.okianwarrior@spamgourmet.com on 2014-12-21 20:08:31:
The changes made in 6.07 cause spurious problems with systems which have a high connection latency to the internet. The error returned is:
A connect request was made on an already connected socket. at C:/Strawberry/perl/vendor/lib/LWP/Protocol/http.pm line 49.
Four files are attached: TestW.pl always works (for comparison), TestF.pl always fails (see below), Error.txt is the full text of the error message, and Diff.txt is the diff between the working version (6.06) and non-working version (6.07) of HTTP.pm.
Specifically, a NAT system directly connected to the internet never sees the error, a system using a hard-line ethernet to the NAT sees the error 20% of the time, and a system using a WiFi dongle to the NAT sees the error 100% of the time.
This is not in any way a problem with the systems, the internet connections, or configurations thereof. I have included a test case that always works; additionally, version 6.06 of HTTP.pm always works, while 6.07 fails on the same system.
This is using the Strawberry perl Win32 ZIP version, on a fresh install of WinXP service pack 3 known to have no viruses.
The module HTTP.pm is used indirectly by CPAN, so this bug breaks CPAN, which is how I initially found it. A laptop connecting via WiFi to a home NAT system will be unable to run CPAN.
For comparison, note that bug #98306 refers to other problems caused by the same paragraph of code in HTTP.pm V6.07.
This problem may be difficult for to debug and test. I have machines on a NAT setup as described - if the authors/maintainers need an external test bed please contact me.