How is modperl 2 working with apache 2 under worker mpm?

How is modperl 2 working with apache 2 under worker mpm? Has anyone successfully deploy modperl2 using worker mpm? I recently wrote a script in perl using ithread and it kept failing. Is there any guideline for writing modperl 2 handler using worker mpm? Thanks Khai

Bug report $r->read() fail

-8<-- Start Bug Report 8<-- 1. Problem Description: Calling $r->read($buf,0) result in an internal server error, and an entry in error_log: The LENGTH argument can't be negative at . 2. Used Components and their Configuration: *** mod_perl version