in reply to Re^6: mod_perl, prefork mpm and alarms
in thread mod_perl, prefork mpm and alarms

STDIN and STDOUT are tied under mod_perl, but you should be able to open pipes to another process. Usually, the best way to handle this kind of thing is a separate job queue process, as suggested by some others.

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Re^8: mod_perl, prefork mpm and alarms
by talexb (Chancellor) on Nov 30, 2006 at 18:11 UTC

    Just posting here for sake of completeness .. after plugging Log::Log4perl in various places, I discovered the fatal error was

    Can't locate object method "FILENO" via package 
"Apache::RequestRec" at /usr/lib/perl5/5.8.0/IPC/Open3.pm line 196

    [download]

    So that means I need to figure out how to solve that problem .. but at least I know what problem I'm trying to solve now.

    Alex / talexb / Toronto

    "Groklaw is the open-source mentality applied to legal research" ~ Linus Torvalds

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      I think you just need to untie STDIN. See this thread for examples.
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        For those interested, the fix that perrin refers to above is as follows:

          Found this somewhere back when this bug first appeared in mod_perl:

          # work-around for mod_perl
my $tie_stdin = tied *STDIN;
untie *STDIN if $tie_stdin;

# insert open2() or open3() statement after the above

          [download]

          Gerald,

          It is a mod_perl bug, but I would consider putting it in the FAQ. Would probably be very helpful to people.

        I started work on converting the existing code to use IPC::Run, but hadn't finished by the end of the day today .. so I may put that on hold and try this fix instead.

        ++beer!

        Alex / talexb / Toronto

        "Groklaw is the open-source mentality applied to legal research" ~ Linus Torvalds

        Update: Added clarification in first paragraph as to the source of the fix.

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[d/l]

        Well, just tried this fix, and it didn't change the error that pops out.

        I'm still getting

        Can't locate object method "FILENO" via package
"Apache::RequestRec" at /usr/lib/perl5/5.8.0/IPC/Open3.pm line 196

        [download]

        FWIW, STDIN was defined when I unTIEd it, but it made no difference to the behaviour.

        I'll go back to working on the IPC::Run approach now.

        Alex / talexb / Toronto

        "Groklaw is the open-source mentality applied to legal research" ~ Linus Torvalds

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[d/l]

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