Update
CoreFonts
and
JRE
version in the following manner:
Download the binaries on the target server before deployment.
After deploy on prodapp01, with Apache still in maintenance mode and all GOD processes stopped, execute the binaries.
Update
JRE
on DB Slave server. Do not start GOD processes as it might interfere with delayed_job(s).
This server has the Tomcat/Solr process.
Post installation on App01, continue with installation on this server.
Start GOD processes on prodapp01.