Red Hat SummitChapter 1. New features and enhancements
Red Hat JBoss Core Services 2.4.51 includes the following new features and enhancements.
1.1. Renaming of mod_cluster-native to mod_proxy_cluster
From JBCS 2.4.51 onward, mod_cluster-native has been renamed mod_proxy_cluster.
The following name changes have been introduced in this release:
-
The
jbcs-httpd24-mod_cluster-nativepackage has been renamedjbcs-httpd24-mod_proxy_cluster. -
The
mod_cluster.conffile has been renamedmod_proxy_cluster.conf. -
The
mod_clustercache has been renamedmod_proxy_cluster. -
The
mod_clusterSELinux policy has been renamedmod_proxy_cluster. -
References to the
mod_clusterconnector in JBCS product documentation have been changed tomod_proxy_cluster.
1.2. Default MPM is event on Red Hat Enterprise Linux 8
From JBCS 2.4.51 onward, the event multi-processing module (MPM) is set as the default MPM on Red Hat Enterprise Linux 8. This supercedes the behavior in previous releases where the prefork MPM was set as the default.
This change applies to the default MPM on Red Hat Enterprise Linux 8 only. The prefork MPM remains the default MPM on Red Hat Enterprise Linux 7.
1.3. Configuration of MPM performance settings in the mpm.conf file
From JBCS 2.4.51 onward, the JBCS_HOME/httpd/conf.d/mpm.conf file now contains the performance settings for multi-processing modules (MPMs). This supersedes the behavior in JBCS 2.4.37 or earlier releases where the JBCS_HOME/httpd/conf.modules.d/00-mpm.conf file contained these MPM performance settings.
If you are upgrading from JBCS 2.4.37 or earlier, ensure that you configure the conf.d/mpm.conf file for your upgraded 2.4.51 installation to match any customized settings that you previously configured in conf.modules.d/00-mpm.conf. Otherwise, your upgraded JBCS 2.4.51 installation automatically uses the default settings in the conf.d/mpm.conf file, which might lead to unexpected performance issues.
In JBCS 2.4.51, the JBCS_HOME/httpd/conf.modules.d/00-mpm.conf file still contains the LoadModule directives for MPM types, as in previous releases.
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