I started getting this error sporadically from different pieces of code. Both modules(cached) and scripts(not cached): [error] PerlRun: `Undefined subroutine &Data::Dumper::Dumper
perl -MData::Dumper -e'print Dumper %ENV' works fine from commandline which rules out a hdd problem.
An apache restart stopped error completely, which led me to think it was a RAM problem that messed up the symbol table in a certain apache child which caused the sporadic errors.
I had no errors for ten days, but now it started doing it again, with the exact same undefined message for Dumper, which makes me realize it's not a RAM issue.
It started yesterday, and code had not been modified for 5 days. I also have PerlInitHandler Apache::StatINC PerlSetVar StatINC_UndefOnReload On
Any ideas what could be causing this problem, or suggestions as to how I should investigate it further?
Here is my version info
Embedded Perl version v5.6.1 for Apache/1.3.29 (Unix) mod_throttle/3.1.2 mod_perl/1.29 mod_ssl/2.8.16 OpenSSL/0.9.6b
This is the simplified script I made to reproduce the problem: #!/usr/bin/perl use Data::Dumper; print "Content-type: text/plain\n\n"; print Dumper(\%ENV); exit;
Which resulted, sporadically(upon hitting certain apache child I assume), in this error:
[Fri May 28 15:09:25 2004] [error] PerlRun: `Undefined subroutine &Data::Dumper::Dumper called at /data/cgi-bin/printenv line 4
I think it's due to your use of StatINC, please have a read of this section: http://perl.apache.org/docs/2.0/api/Apache/Reload.html#Problems_with_Scripts_Running_with_Registry_Handlers_that_Cache_the_Code
You should move to Apache::Reload anyway (for mp1 it's available on CPAN, mp2 is a part of the core), though you will probably have the same issue.
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