Copied Tomcat 6 webapp working fine on one server to another Tomcat 6 server get Null component error

Question

I am running tomcat 6, 64 bit on a Windows 7 64 bit platform. I copied my web application (entire folder - it is called cuba4remedy) to a tomcat 6 64 bit installation on a different machine. this one running Windows 2008 standard 64 bit.

The servlet was working fine on my Windows 7 development machine but when I run on the new machine I see this error in the Catalinaxxx.log :-

SEVERE: Null component Catalina:type=JspMonitor,name=jsp,WebModule=//localhost/myappnamehere,J2EEApplication=none,J2EEServer=none

I don't really understand why I am getting this error. Any ideas anyone?

One more point might be relevant. I compiled on my dev machine using Javac version 1.7. On the machine I copied to only the Java runtime is installed - that is Java version 1.6.

EDIT For anyone else facing this problem, it seems that dev version of Java must be either same or lower version than deployment. I downgraded my dev java version to same as target runtime version and then this error went away. Can anyone confirm this?

Answer 1

You can compile with J7 and deploy on J7. Just use the parameter -target 1.6 when you compile for a JDK 1.6. Otherwise (as it's expected) java 7 will compile for a java 7 runtime.