Fedora 35: 2021-3e8bcf2d2e Significant: Mod_Security Buffer Overflow Patch

Mod_cluster is an httpd-based load balancer. Like mod_jk and mod_proxy,

mod_cluster uses a communication channel to forward requests from httpd to one

of a set of application server nodes. Unlike mod_jk and mod_proxy, mod_cluster

leverages an additional connection between the application server nodes and

httpd. The application server nodes use this connection to transmit server-side

load balance factors and lifecycle events back to httpd via a custom set of

HTTP methods, affectionately called the Mod-Cluster Management Protocol (MCMP).

This additional feedback channel allows mod_cluster to offer a level of

intelligence and granularity not found in other load balancing solutions.

Fixed remote exploits in Apache HTTP Server mod_manager and mod_proxy_cluster modules, fixed performance problems with shared memory, fixed thread pool off- by-one errors, enhanced Tomcat 8 interoperability, fixed mod_proxy integration, added WebSockets proxy layer for mod_cluster.