Hi All, We have a modperl application that is an online homework system for math courses called webwork. My installation and a few others have seen a sporadic error from APR::Table that nobody quite knows how to diagnose. Here are two typical examples:
Example 1: Can't locate object method "get" via package "APR::Table" at [WW]/lib/Apache/WeBWorK.pm line 74 Died within AnswerEvaluator::evaluate called at line 1 of (eval 1321) System: Ubuntu 8.04, Apache 2.2 Example 2: Failed to initialize course environment: Could not evaluate global environment file /opt/webwork/webwork2/conf/global.conf: Can't locate object method "get" via package "APR::Table" at /opt/webwork/webwork2/lib/Apache/WeBWorK.pm line 74. RHEL 5 with RedHat's build of Apache 2.2.3. 1 GB RAM, perl-status shows ARP::Table is loaded. APR::Table 0.009000 Fri Sep 19 04:30:28 2008 /usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi/APR/Table.pm I'm hoping you might be able to provide some suggestions of where to start looking for the source of this problem. The modperl handler is here: http://webwork.maa.org/viewvc/system/trunk/webwork2/lib/Apache/WeBWorK.pm?view=markup The error was not seen (and has not been seen) running mod_perl 1. Here is a report from one user: We've seen the APR::Table error sporadically, and have found it to be > chronic and page load dependent. We've found in every case that if we reload > the page the error will go away. Our hypothesis is that it's probably a > thread initialization problem, and that it shows up when the apache process > hands the WeBWorK job off to a new thread that doesn't have all of the > required Perl loaded before the it tries to execute the WeBWorK request. > That said, we don't know much about thread management in apache, so we don't > know if that's even credible. Any hints/tips/ideas would be very much appreciated. Thanks, Jason
