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From Tim Sturtewagen <...@doggybites.com>
Subject [users@httpd] RewriteLock never created 2.0.54-4
Date Tue, 16 Aug 2005 11:20:34 GMT
    *1. /tim.sturtewa...@gmail.com/*  	  Aug 16, 12:48 pm     show 
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Date: *16 Aug 2005 03:48:34 -0700*
Local: *Tues, Aug 16 2005 12:48 pm *
Subject: *RewriteLock never created*
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Hi,

I am having a hard time here configuring apache2 with mode_rewrite.
The setup is as this: I use mod_rewrite which is working fine.
I use an external perl RewriteMap program:

#!/usr/bin/perl

#   disable buffered I/O which would lead
#   to deadloops for the Apache server
$| = 1;

#   read cookie values one per line from stdin and
#   generate substitution URL on stdout
while (<STDIN>) {
    my $tofind = "";
    if (/([^\.]+).*/) {
        $tofind = $1;
    }
    if (!$tofind == "") {
        if (/[^\.]+(.*)\.$tofind-([^\.|\n]+)([^\n]*)/) {
            print "$2$3$1\n";
        } elsif (/[^\.]+\.$tofind-([^\.|\n]+)([^\n]*)/) {
            print "$1$2\n";
        } elsif (/[^\.]+([^\n]*)/) {
            print "1$1\n";
        }
    } else {
        print "1\n";
    }

}

It simply reads a key and with a regex changes some values in it.
The program works fine, when tested command line.
I also use a RewriteLock like this:
RewriteLock /var/lock/apache2/map.cookie.l
ock

When I freshly reload the server and get a lot of hits, all works fine.

But after a while,
the RewriteMap starts returning unsynchronized values. So I get
rewritten values for keys of other requests.
The error that i see when reload apache once the errors stat ocurring
is:
[Sun Aug 14 17:19:20 2005] [error] [client 213.3.49.145] (43)Identifier

removed: apr_global_mutex_lock(rewrite_mapr_lock_acquire) failed

I have tried changing the |AcceptMutex directive, which in Debian is
default sysvsem, to fcntl or flock, but without any success. No lock
files, and out-of-sync after a while.

I was wondering if anyone has any experience with this?

For reference: the apache version is 2.0.54-4 on debian unstable

Kind regards,

Tim Sturtewagen


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