SELinux
Security-Enhanced Linux trickery
httpd-jk
Apache Tomcat connector
If you copy the sample config file for httpd-jk.conf then under SELinux you'll see
errno=13. Load balancing workers will not function properly.
In httpd-jk.conf there is a statement:
JkShmFile logs/mod_jk.shm
it should say something like:
JkShmFile /var/run/httpd/mod_jk.shm
ie. somewhere where the httpd daemon, running as apache (on CentOS), has SELinux-granted permission to write.
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