mod_cluster undersizes the connection pool on httpd 2.2 ------------------------------------------------------- Key: MODCLUSTER-466 URL: https://issues.jboss.org/browse/MODCLUSTER-466 Project: mod_cluster Issue Type: Bug Reporter: Aaron Ogburn Assignee: Jean-Frederic Clere Fix For: 1.2.12.Final If all threads in a httpd child worker process are saturated with long requests, then all connections in the pool are exhausted, likely leaving none available for additional pings, which then fail with errors like: [error] (70007)The timeout specified has expired: proxy: ajp: failed to acquire connection for ... Documentation suggests the connection pool will be sized to ThreadsPerChild+1 to avoid that, but it looks like it is really just ThreadsPerChild on httpd 2.2.