Thanks Ray. I am running one server and I deployed CAS to Tomcat.
I have changed the Tomcat port to 8447 and restarted.
02-Jan-2019 23:40:10.691 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server version: Apache Tomcat/8.5.35
02-Jan-2019 23:40:10.735 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server built: Nov 3 2018 17:39:20 UTC
02-Jan-2019 23:40:10.735 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server number: 8.5.35.0
02-Jan-2019 23:40:10.735 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Name: Linux
02-Jan-2019 23:40:10.735 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Version: 3.10.0-957.1.3.el7.x86_64
02-Jan-2019 23:40:10.735 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Architecture: amd64
02-Jan-2019 23:40:10.735 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Java Home: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.191.b12-1.el7_$
02-Jan-2019 23:40:10.736 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Version: 1.8.0_191-b12
02-Jan-2019 23:40:10.736 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Vendor: Oracle Corporation
02-Jan-2019 23:40:10.736 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_BASE: /opt/tomcat/apache-tomcat-8.5.35
02-Jan-2019 23:40:10.736 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_HOME: /opt/tomcat/apache-tomcat-8.5.35
02-Jan-2019 23:40:10.736 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=/opt/tomcat/latest
02-Jan-2019 23:40:10.736 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=/opt/tomcat/latest
02-Jan-2019 23:40:10.736 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.awt.headless=true
02-Jan-2019 23:40:10.736 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoa$
02-Jan-2019 23:40:10.736 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=/opt/tomcat/latest/c$
02-Jan-2019 23:40:10.737 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Xms512M
02-Jan-2019 23:40:10.737 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Xmx2048M
02-Jan-2019 23:40:10.737 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -XX:+UseParallelGC
02-Jan-2019 23:40:10.737 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -
Dcommons.daemon.process.id=4519
02-Jan-2019 23:40:10.737 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcommons.daemon.process.parent=4518
02-Jan-2019 23:40:10.737 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcommons.daemon.version=1.1.0
02-Jan-2019 23:40:10.737 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: abort
02-Jan-2019 23:40:10.737 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent Loaded APR based Apache Tomcat Native library [1.2.18] using APR ver$
02-Jan-2019 23:40:10.737 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent APR capabilities: IPv6 [true], sendfile [true], accept filters [fals$
02-Jan-2019 23:40:10.737 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent APR/OpenSSL configuration: useAprConnector [false], useOpenSSL [true]
02-Jan-2019 23:40:10.741 INFO [main] org.apache.catalina.core.AprLifecycleListener.initializeSSL OpenSSL successfully initialized [OpenSSL 1.1.0g 2 Nov 2017]
02-Jan-2019 23:40:10.914 INFO [main] org.apache.coyote.http11.AbstractHttp11Protocol.configureUpgradeProtocol The ["https-openssl-nio-8447"] connector has been config$
02-Jan-2019 23:40:10.914 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["https-openssl-nio-8447"]
02-Jan-2019 23:40:10.948 WARNING [main] org.apache.tomcat.util.net.SSLHostConfig.setConfigType The property [disableSessionTickets] was set on the SSLHostConfig named$
02-Jan-2019 23:40:11.362 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read
02-Jan-2019 23:40:11.380 INFO [main] org.apache.catalina.startup.Catalina.load Initialization processed in 1667 ms
02-Jan-2019 23:40:11.428 INFO [main] org.apache.catalina.core.StandardService.startInternal Starting service [Catalina]
02-Jan-2019 23:40:11.428 INFO [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine: Apache Tomcat/8.5.35
02-Jan-2019 23:40:11.450 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/var/lib/tomcat/ROOT]
02-Jan-2019 23:40:12.049 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/var/lib/tomcat/$
02-Jan-2019 23:40:12.050 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/var/lib/tomcat/cas]
02-Jan-2019 23:41:19.687 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server version: Apache Tomcat/8.5.35
02-Jan-2019 23:41:19.720 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server built: Nov 3 2018 17:39:20 UTC
02-Jan-2019 23:41:19.720 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server number: 8.5.35.0
02-Jan-2019 23:41:19.720 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Name: Linux
02-Jan-2019 23:51:43.175 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Vendor: Oracle Corporation
02-Jan-2019 23:51:43.175 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_BASE: /opt/tomcat/apache-tomcat-8.5.35
02-Jan-2019 23:51:43.175 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_HOME: /opt/tomcat/apache-tomcat-8.5.35
02-Jan-2019 23:51:43.176 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=/opt/tomcat/latest
02-Jan-2019 23:51:43.176 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=/opt/tomcat/latest
02-Jan-2019 23:51:43.176 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.awt.headless=true
02-Jan-2019 23:51:43.176 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoa$
02-Jan-2019 23:51:43.176 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=/opt/tomcat/latest/c$
02-Jan-2019 23:51:43.176 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Xms512M
02-Jan-2019 23:51:43.176 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Xmx2048M
02-Jan-2019 23:51:43.176 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -XX:+UseParallelGC
02-Jan-2019 23:51:43.176 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -
Dcommons.daemon.process.id=4699
02-Jan-2019 23:51:43.177 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcommons.daemon.process.parent=4518
02-Jan-2019 23:51:43.177 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcommons.daemon.version=1.1.0
02-Jan-2019 23:51:43.177 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: abort
02-Jan-2019 23:51:43.177 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent Loaded APR based Apache Tomcat Native library [1.2.18] using APR ver$
02-Jan-2019 23:51:43.177 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent APR capabilities: IPv6 [true], sendfile [true], accept filters [fals$
02-Jan-2019 23:51:43.177 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent APR/OpenSSL configuration: useAprConnector [false], useOpenSSL [true]
02-Jan-2019 23:51:43.185 INFO [main] org.apache.catalina.core.AprLifecycleListener.initializeSSL OpenSSL successfully initialized [OpenSSL 1.1.0g 2 Nov 2017]
02-Jan-2019 23:51:43.357 INFO [main] org.apache.coyote.http11.AbstractHttp11Protocol.configureUpgradeProtocol The ["https-openssl-nio-8447"] connector has been config$
02-Jan-2019 23:51:43.357 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["https-openssl-nio-8447"]
02-Jan-2019 23:51:43.421 WARNING [main] org.apache.tomcat.util.net.SSLHostConfig.setConfigType The property [disableSessionTickets] was set on the SSLHostConfig named$
02-Jan-2019 23:51:43.795 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read
02-Jan-2019 23:51:43.799 INFO [main] org.apache.catalina.startup.Catalina.load Initialization processed in 1528 ms
02-Jan-2019 23:51:43.849 INFO [main] org.apache.catalina.core.StandardService.startInternal Starting service [Catalina]
02-Jan-2019 23:51:43.850 INFO [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine: Apache Tomcat/8.5.35
02-Jan-2019 23:51:43.879 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/var/lib/tomcat/ROOT]
02-Jan-2019 23:51:44.520 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/var/lib/tomcat/$
02-Jan-2019 23:51:44.520 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/var/lib/tomcat/cas]
Any help will be appreciated. Thanks