When initiating the Tomcat instance, the cas-stderr log file will log a SEVERE error logging multiple times every few seconds
The error response would looks something like this, SEVERE https-openssl-nio-443-exec-1 org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun Obviously, the java.lang.NullPointerException doesn't help anyone understand the situation or the root cause. The packages highlighted in the stack trace however provides some indication on the root cause.
I believe the situation occurs when Tomcat itself is using the Java packages to when initiating a handshake. Because of this, it would be indicative that this has to be because of the java keystore that is instantiated during the startup. Because I am using Java 8, there is a new NIO package (it's actually available for Java 7 onwards)
Turns out that I needed the include the 'protocol="org.apache.coyote.http11.Http11Nio2Protocol' within the connector node, located within the server.xml file. Examples are shown within the images.
Once I included the Http11Nio2Protocol declaration, I bounced the Tomcat instance and the error was no longer presented. The web applications were also operating as expected
About the author
Daniel is a Technical Manager with over 10 years of consulting expertise in the Identity and Access Management space.Daniel has built from scratch this blog as well as technicalconfessions.com
Follow Daniel on twitter @nervouswiggles
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