Tomcat unable to start application - spring

Question

I have installed petclinic application in tomcat server. During tomcat start up and loading of petclinic application I am having the error with the followed stack trace. How to resolve this issue ?
apache-tomcat-7.0.47/webapps/petclinic
Oct 27, 2016 12:14:36 PM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error during ServletContainerInitializer processing
javax.servlet.ServletException: Failed to instantiate WebApplicationInitializer class at
org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:160)
at
org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5423)
at
org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at
org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at
org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at
org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
at
org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1120)
at
org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1678)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:483)
at java.util.concurrent.FutureTask.run(FutureTask.java:274) at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1157)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:627)
at java.lang.Thread.run(Thread.java:798) Caused by:
java.lang.NoClassDefFoundError:
org.glassfish.jersey.server.ResourceConfig at
java.lang.J9VMInternals.verifyImpl(Native Method) at
java.lang.J9VMInternals.verify(J9VMInternals.java:94) at
java.lang.J9VMInternals.initialize(J9VMInternals.java:169) at
java.lang.J9VMInternals.newInstanceImpl(Native Method) at
java.lang.Class.newInstance(Class.java:1781) at
org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:157)
... 12 more Caused by: java.lang.ClassNotFoundException:
org.glassfish.jersey.server.ResourceConfig at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1702)
at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547)
... 18 more

Answer 1

I think you didn't let spring know about some bean class.
Look at your context.xml or dispatcher-context.xml.
In the exception stack above,
it says java.lang.ClassNotFoundException occured.
Spring can't find class files even if you have them in your java src package.
If my answer doesn't solve your problem,
you need to show your xml or source code to make sure what the problem is.