On Mon, Mar 11, 2013 at 3:15 PM, Gisle Aas <gi...@activestate.com> wrote:
> There are new releases of libwww-perl and Net-HTTP on CPAN now. I hope > they resolve the issue. > With a few quick tests it seems fixed. Thanks very much for this update! > > --Gisle > > > On Fri, Mar 8, 2013 at 8:47 AM, Bill Moseley <mose...@hank.org> wrote: > >> Some LWP requests are hanging *most* of the time. Sometimes they work. >> At >> >> times it seems dependent if gzip is used or not. This behavior seems to >> have started with recent LWP upgrades. If I use Net::HTTPS 6.04 (most >> current) I see the problem. Reverting to Net::HTTPS 6.02 appears to fix >> the issue. >> >> >> I'm not clear if it's related to this ticket: >> https://rt.cpan.org/Public/Bug/Display.html?id=81237 >> >> Below are example command line requests and where they are hanging in LWP. >> >> >> LWP::UserAgent is up to date. (6.04) >> LWP::Protocol::https is up to date. (6.03) >> Net::SSL is up to date. (2.85) >> openssl098e.x86_64 >> CentOS 6.2. >> >> Net::HTTPS (6.04) / Net-HTTP-6.05 -- hangs. >> Net::HTTPS (6.04) / Net-HTTP-6.04 -- hangs. >> Net::HTTPS (6.02) / Net-HTTP-6.03 -- works ok. >> >> >> The page fetched below is behind an F5 load balancer that handles the SSL >> and gzip compression. >> >> >> In LWP::Protocol::http I've modified the code like this so it's easy to >> see >> that read_entity_body is hanging. >> >> READ: >> { >> warn "Reading $size from $socket\n"; >> $n = $socket->read_entity_body($buf, $size); >> warn "Read $n bytes\n"; >> unless (defined $n) { >> redo READ if $!{EINTR} || $!{EAGAIN}; >> die "read failed: $!"; >> } >> redo READ if $n == -1; >> } >> >> For example: >> >> $ perl -MLWP::UserAgent -e 'LWP::UserAgent->new->get( " >> https://app.ithenticate.com/en_us/login";, accept_encoding => "gzip" );' >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x164d0c8) >> Read 605 bytes >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x164d0c8) >> (hangs here) >> ^C >> >> >> $ perl -MLWP::UserAgent -e 'LWP::UserAgent->new->get( " >> https://app.ithenticate.com/en_us/login";, *accept_encoding => "nope"* );' >> >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x26ea0c8) >> Read 653 bytes >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x26ea0c8) >> Read 459 bytes >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x26ea0c8) >> Read 2896 bytes >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x26ea0c8) >> Read 1448 bytes >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x26ea0c8) >> Read 2880 bytes >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x26ea0c8) >> Read 0 bytes >> >> Yet, it's not consistent. Here's without gzip and it does hang. >> >> $ perl -MLWP::UserAgent -e 'LWP::UserAgent->new->get( " >> https://app.ithenticate.com/en_us/login";, accept_encoding => "nope" );' >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x14720c8) >> Read 653 bytes >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x14720c8) >> Read 471 bytes >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x14720c8) >> Read 4096 bytes >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x14720c8) >> ( hangs here again ) >> ^C >> >> Then again it works: >> >> $ perl -MLWP::UserAgent -e 'LWP::UserAgent->new->get( " >> https://app.ithenticate.com/en_us/login";, accept_encoding => "nope" );' >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x19530c8) >> Read 653 bytes >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x19530c8) >> Read 459 bytes >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x19530c8) >> Read 2896 bytes >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x19530c8) >> Read 1448 bytes >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x19530c8) >> Read 2880 bytes >> Reading 4096 from LWP::Protocol::https::Socket=GLOB(0x19530c8) >> Read 0 bytes >> >> Sorry, not a lot to go on. >> >> -- >> Bill Moseley >> mose...@hank.org >> > > -- Bill Moseley mose...@hank.org
