Posted by – July 11, 2009
I hate this. Messages like this shouldn’t be permitted. The proper format should be
Setter not found for property “class”
In other words, a JSF tag was coded with a “class=” attribute. So actually, an even more precise rendering should be:
No valid setter method exists for attribute named “class”.
In a civilized world, the element name and line where the offense was committed would be reported as well.
At any rate, the cause of the error is that the attribute should have been “styleClass”, not “class”.
Another one of those obscure things that a web search didn’t turn up. Using the “psql” command-line utility, it was possible to connect to and access the PostgreSQL Trac database. However, the webapp failed, with “cannot connect to server: Permission denied”. No amount of tweaking the firewalls or the pg_hba.conf file would help.
It turns out that the permission wasn’t PostgreSQL, it was selinux. It was forbidding psycopg from opening a database connection while running inside Apache. It wants a “allow httpd_t postgresql_port_t:tcp_socket name_connect;”.
A message shows up in /var/log/audit/audit.log – if you think to look there.