Re: [rrd-users] Unable to specify which version of RRDs perl module

On 4/15/07, David Ball <davidtball@gmail.com> wrote:
> Thanks very much, Sam. That was the ticket. I was CERTAIN I had
> tried specifying the version yesterday at some point, but obviously
> hadn't done so correctly, or was being tripped up by something else.
> Thanks again. Much appreciated.

David,

I'm glad that worked for you. In the future, here's a nice trick to
diagnose perl module loading errors:

$ perl -MRRDs -MData::Dumper -e 'print Dumper(\@INC, \%INC);'
$VAR1 = [
'/usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi',
'/usr/lib/perl5/site_perl/5.8.7/i386-linux-thread-multi',
'/usr/lib/perl5/site_perl/5.8.6/i386-linux-thread-multi',
'/usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi',
'/usr/lib/perl5/site_perl/5.8.8',
'/usr/lib/perl5/site_perl/5.8.7',
'/usr/lib/perl5/site_perl/5.8.6',
'/usr/lib/perl5/site_perl/5.8.5',
'/usr/lib/perl5/site_perl',
'/usr/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi',
'/usr/lib/perl5/vendor_perl/5.8.7/i386-linux-thread-multi',
'/usr/lib/perl5/vendor_perl/5.8.6/i386-linux-thread-multi',
'/usr/lib/perl5/vendor_perl/5.8.5/i386-linux-thread-multi',
'/usr/lib/perl5/vendor_perl/5.8.8',
'/usr/lib/perl5/vendor_perl/5.8.7',
'/usr/lib/perl5/vendor_perl/5.8.6',
'/usr/lib/perl5/vendor_perl/5.8.5',
'/usr/lib/perl5/vendor_perl',
'/usr/lib/perl5/5.8.8/i386-linux-thread-multi',
'/usr/lib/perl5/5.8.8',
'.'
];
$VAR2 = {
'bytes.pm' => '/usr/lib/perl5/5.8.8/bytes.pm',
'XSLoader.pm' =>
'/usr/lib/perl5/5.8.8/i386-linux-thread-multi/XSLoader.pm',
'Carp.pm' => '/usr/lib/perl5/5.8.8/Carp.pm',
'warnings/register.pm' => '/usr/lib/perl5/5.8.8/warnings/register.pm',
'Exporter.pm' => '/usr/lib/perl5/5.8.8/Exporter.pm',
'vars.pm' => '/usr/lib/perl5/5.8.8/vars.pm',
'strict.pm' => '/usr/lib/perl5/5.8.8/strict.pm',
'warnings.pm' => '/usr/lib/perl5/5.8.8/warnings.pm',
'overload.pm' => '/usr/lib/perl5/5.8.8/overload.pm',
'AutoLoader.pm' => '/usr/lib/perl5/5.8.8/AutoLoader.pm',
'RRDs.pm' =>
'/usr/lib/perl5/vendor_perl/5.8.5/i386-linux-thread-multi/RRDs.pm',
'Config.pm' =>
'/usr/lib/perl5/5.8.8/i386-linux-thread-multi/Config.pm',
'DynaLoader.pm' =>
'/usr/lib/perl5/5.8.8/i386-linux-thread-multi/DynaLoader.pm',
'Data/Dumper.pm' =>
'/usr/lib/perl5/5.8.8/i386-linux-thread-multi/Data/Dumper.pm'
};

If you can inspect the output when this is called from the command
line and compare it when called from Apache, you would have quickly
seen the issue.

-Sam

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