java.lang.ClassNotFoundException: lowercased class name?

Has anyone ever encountered this error?

It confuses me because:
1. It doesn't happen often, but happens a few times a day
2. Only happens on production
3. Pretty much all functionality work fine when tested manually

What's weird is the class name is lowercased, i.e.
"org.apache.wicket.ajax.form.ajaxformchoicecomponentupdatingbehavior"
doesn't exist... but
"org.apache.wicket.ajax.form.AjaxFormChoiceComponentUpdatingBehavior" does.
Who did the lowercasing?

23:41:01.411 WARN | kalyanitun | |
-ver-d12e39a9a23f5adefcfe3bfc3d520d68.js
msnbot-207-46-13-117.search.msn.com Mozilla/5.0 (compati | -apr-8204-exec-4
| o.a.w.c.u.l.WicketObjects | Could not resolve class
[org.apache.wicket.ajax.form.ajaxformchoicecomponentupdatingbehavior]
java.lang.ClassNotFoundException:
org.apache.wicket.ajax.form.ajaxformchoicecomponentupdatingbehavior
at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1718)
~[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1569)
~[tomcat-catalina-7.0.52.jar:7.0.52]
at java.lang.Class.forName0(Native Method) ~[na:1.8.0_25]
at java.lang.Class.forName(Class.java:344) ~[na:1.8.0_25]
at
org.apache.wicket.application.AbstractClassResolver.resolveClass(AbstractClassResolver.java:108)
~[wicket-core-6.18.0.jar:6.18.0]
at
org.apache.wicket.core.util.lang.WicketObjects.resolveClass(WicketObjects.java:72)
~[wicket-core-6.18.0.jar:6.18.0]
at
org.apache.wicket.core.request.mapper.BasicResourceReferenceMapper.resolveClass(BasicResourceReferenceMapper.java:153)
[wicket-core-6.18.0.jar:6.18.0]
at
org.apache.wicket.core.request.mapper.BasicResourceReferenceMapper.mapRequest(BasicResourceReferenceMapper.java:129)
[wicket-core-6.18.0.jar:6.18.0]
at
org.apache.wicket.request.mapper.ParentPathReferenceRewriter.mapRequest(ParentPathReferenceRewriter.java:84)
[wicket-request-6.18.0.jar:6.18.0]
at
org.apache.wicket.request.mapper.CompoundRequestMapper.mapRequest(CompoundRequestMapper.java:152)
[wicket-request-6.18.0.jar:6.18.0]
at
org.apache.wicket.request.cycle.RequestCycle.resolveRequestHandler(RequestCycle.java:190)
[wicket-core-6.18.0.jar:6.18.0]
at
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:215)
[wicket-core-6.18.0.jar:6.18.0]
at
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
[wicket-core-6.18.0.jar:6.18.0]
at
org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
[wicket-core-6.18.0.jar:6.18.0]
at
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:201)
[wicket-core-6.18.0.jar:6.18.0]
at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:282)
[wicket-core-6.18.0.jar:6.18.0]
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.soluvas.web.site.servlet.ShiroPrincipalsServletFilter.doFilter(ShiroPrincipalsServletFilter.java:59)
[org.soluvas.web.site-2.2.0-SNAPSHOT.jar:na]
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.soluvas.web.site.servlet.MoreMdcServletFilter.doFilter(MoreMdcServletFilter.java:62)
[org.soluvas.web.site-2.2.0-SNAPSHOT.jar:na]
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
ch.qos.logback.classic.helpers.MDCInsertingServletFilter.doFilter(MDCInsertingServletFilter.java:51)
[logback-classic-1.1.2.jar:na]
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)
[shiro-web-1.2.3.jar:1.2.3]
at
org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
[shiro-web-1.2.3.jar:1.2.3]
at
org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
[shiro-core-1.2.3.jar:1.2.3]
at
org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
[shiro-core-1.2.3.jar:1.2.3]
at
org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)
[shiro-core-1.2.3.jar:1.2.3]
at
org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
[shiro-web-1.2.3.jar:1.2.3]
at
org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
[shiro-web-1.2.3.jar:1.2.3]
at
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
[spring-web-4.1.2.RELEASE.jar:4.1.2.RELEASE]
at
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)
[spring-web-4.1.2.RELEASE.jar:4.1.2.RELEASE]
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
com.codahale.metrics.servlet.AbstractInstrumentedFilter.doFilter(AbstractInstrumentedFilter.java:104)
[metrics-servlet-3.1.0.jar:3.1.0]
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
[tomcat-catalina-7.0.52.jar:7.0.52]
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
[tomcat-coyote-7.0.52.jar:7.0.52]
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
[tomcat-coyote-7.0.52.jar:7.0.52]
at
org.apache.tomcat.util.net.AprEndpoint$SocketWithOptionsProcessor.run(AprEndpoint.java:2378)
[tomcat-coyote-7.0.52.jar:7.0.52]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[na:1.8.0_25]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[na:1.8.0_25]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_25]
java.lang.ClassNotFoundException:
org.apache.wicket.ajax.form.ajaxformchoicecomponentupdatingbehavior
at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1718)
at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1569)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:344)
at
org.apache.wicket.application.AbstractClassResolver.resolveClass(AbstractClassResolver.java:108)
at
org.apache.wicket.core.util.lang.WicketObjects.resolveClass(WicketObjects.java:72)
at
org.apache.wicket.core.request.mapper.BasicResourceReferenceMapper.resolveClass(BasicResourceReferenceMapper.java:153)
at
org.apache.wicket.core.request.mapper.BasicResourceReferenceMapper.mapRequest(BasicResourceReferenceMapper.java:129)
at ExceptionWarning
org.apache.wicket.request.mapper.ParentPathReferenceRewriter.mapRequest(ParentPathReferenceRewriter.java:84)
at
org.apache.wicket.request.mapper.CompoundRequestMapper.mapRequest(CompoundRequestMapper.java:152)
at
org.apache.wicket.request.cycle.RequestCycle.resolveRequestHandler(RequestCycle.java:190)
at
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:215)
at
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
at
org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
at
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:201)
at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:282)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.soluvas.web.site.servlet.ShiroPrincipalsServletFilter.doFilter(ShiroPrincipalsServletFilter.java:59)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.soluvas.web.site.servlet.MoreMdcServletFilter.doFilter(MoreMdcServletFilter.java:62)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
ch.qos.logback.classic.helpers.MDCInsertingServletFilter.doFilter(MDCInsertingServletFilter.java:51)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)
at
org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
at
org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
at
org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
at
org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)
at
org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
at
org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
at
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
at
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
com.codahale.metrics.servlet.AbstractInstrumentedFilter.doFilter(AbstractInstrumentedFilter.java:104)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at
org.apache.tomcat.util.net.AprEndpoint$SocketWithOptionsProcessor.run(AprEndpoint.java:2378)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)