The NullPointerException is the real problem.
From: Rick Noel <rn...@westwoodone.com.INVALID>
Sent: Monday, April 15, 2024 10:30 AM
To: Tomcat Users List <users@tomcat.apache.org>
Subject: RE: [EXT]Re: .intermittent InvocationTargetException errors
The complete trace. . . . . . . . . java. lang. reflect.
InvocationTargetException at java. base/jdk. internal. reflect.
NativeMethodAccessorImpl. invoke0(Native Method) at java. base/jdk. internal.
reflect. NativeMethodAccessorImpl. invoke(NativeMethodAccessorImpl. java: 77)
The complete trace.........
java.lang.reflect.InvocationTargetException
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at com.radiovoodoo.display.EvalExpr.evalIdentifier(EvalExpr.java:317)
at com.radiovoodoo.display.EvalExpr.eval(EvalExpr.java:57)
at com.radiovoodoo.display.EvalExpr.eval(EvalExpr.java:30)
at com.radiovoodoo.display.Expr.evaluate(Expr.java:370)
at com.radiovoodoo.display.PropertyTag.evaluate(PropertyTag.java:102)
at com.radiovoodoo.display.PropertyTag.doStartTag(PropertyTag.java:55)
at
org.apache.jsp.services.system.contesting.contest_005fschedule_005fedit_jsp._jspx_meth_ww_005fproperty_005f5(contest_005fschedule_005fedit_jsp.java:6193)
at
org.apache.jsp.services.system.contesting.contest_005fschedule_005fedit_jsp._jspService(contest_005fschedule_005fedit_jsp.java:1299)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:456)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:380)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:328)
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:150)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:175)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:150)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:653)
at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:419)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:340)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:277)
at
com.radiovoodoo.action.ServletDispatcher.service(ServletDispatcher.java:177)
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:150)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:175)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:150)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
at
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:673)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
at
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:391)
at
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
at
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1736)
at
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
at
org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at
org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.lang.NullPointerException: Cannot invoke
"java.util.TimeZone.getDisplayName()" because "this.customerTimeZone" is null
at
com.radiovoodoo.action.station.ContestManager.getCustomerTimeZoneDisplayName(ContestManager.java:1195)
... 51 more
Apr 15, 2024 11:26:51 AM com.radiovoodoo.util.Log log
SEVERE:
Exception: java.lang.NullPointerException: Cannot invoke
"java.util.TimeZone.getDisplayName()" because "this.customerTimeZone" is null
Stack Trace follows:
java.lang.NullPointerException: Cannot invoke
"java.util.TimeZone.getDisplayName()" because "this.customerTimeZone" is null
at
com.radiovoodoo.action.station.ContestManager.getCustomerTimeZoneDisplayName(ContestManager.java:1195)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at com.radiovoodoo.display.EvalExpr.evalIdentifier(EvalExpr.java:317)
at com.radiovoodoo.display.EvalExpr.eval(EvalExpr.java:57)
at com.radiovoodoo.display.EvalExpr.eval(EvalExpr.java:30)
at com.radiovoodoo.display.Expr.evaluate(Expr.java:370)
at com.radiovoodoo.display.PropertyTag.evaluate(PropertyTag.java:102)
at com.radiovoodoo.display.PropertyTag.doStartTag(PropertyTag.java:55)
at
org.apache.jsp.services.system.contesting.contest_005fschedule_005fedit_jsp._jspx_meth_ww_005fproperty_005f5(contest_005fschedule_005fedit_jsp.java:6193)
at
org.apache.jsp.services.system.contesting.contest_005fschedule_005fedit_jsp._jspService(contest_005fschedule_005fedit_jsp.java:1299)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:456)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:380)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:328)
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:150)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:175)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:150)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:653)
at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:419)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:340)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:277)
at
com.radiovoodoo.action.ServletDispatcher.service(ServletDispatcher.java:177)
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:150)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:175)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:150)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
at
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:673)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
at
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:391)
at
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
at
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896)
Rick Noel
Systems Programmer | Westwood One
rn...@westwoodone.com<mailto:rn...@westwoodone.com>
-----Original Message-----
From: Christopher Schultz
<ch...@christopherschultz.net<mailto:ch...@christopherschultz.net>>
Sent: Monday, April 15, 2024 11:09 AM
To: users@tomcat.apache.org<mailto:users@tomcat.apache.org>
Subject: [EXT]Re: .intermittent InvocationTargetException errors
Rick,
On 4/15/24 10:04, Rick Noel wrote:
> Hello,
>
> I am using Tomcat 10 with java 17.
>
> I am getting itermitant jsp compile errors below.
>
> Some times the page compiles correctly but sometimes the page hits result in
> below errors............
>
> java.lang.reflect.InvocationTargetException
> at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
> at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.base/java.lang.reflect.Method.invoke(Method.java:568)
> at com.radiovoodoo.display.EvalExpr.evalIdentifier(EvalExpr.java:317)
> at com.radiovoodoo.display.EvalExpr.eval(EvalExpr.java:57)
What is RadioVoodoo?
Is there more of the stack trace?
> I found this explanation for possible cause..........
> Normally "java.lang.reflect.InvocationTargetException" occurs when java
> compiler finds 2 different classes with same name in 2 different packages.
> When you are importing both classes at a time and when you are trying to
> create object of that class it throws
> "java.lang.reflect.InvocationTargetException" exception .
> The solution is that when you are creating the object of the class use
> package name also along with class name so that compiler knows what class it
> has to use.
This is unlikely to be the explanation. I've never seen
InvocationTargetException under the conditions described. The compiler should
never allow you to import two classes with the same "simple"
(without package) name, because it's impossible for it to then tell which one
you mean in a given expression.
> I looked at my code in the jsp and the code in question could be mistaking
> for two different classes.
> My code is meant to use java.util.Timezone but my code also has a
> com.radiovoodoo.customer.Timezone class
What do your imports look like?
> So I thought ah ah will specifical declare the class the I want, so I
> changed From private TimeZone customerTimeZone; to private
> java.util.TimeZone customerTimeZone;
>
> so that the compiler will not think to use
> com.radiovoodoo.customer.Timezone but instead always use java.util.TimeZone
> But this had no effect.
What do your imports look like?
> I still get intermittent java.lang.reflect.InvocationTargetException
> Could this be a possible bug in the class tomcat 10 uses to compile jsp
> -> org.apache.jasper.servlet.JspServlet
It's possible, but not very likely. We have a pretty good set of unit tests,
plus we aren't getting any reports from others that the compiler is failing in
this way.
> Is there a different JspServlet class I could use to test that theory out?
I'm curious as to why RadioVoodoo is being invoked during compilation.
Or is this happening during JSP execution, post-compile? A more complete stack
trace would reveal that.
-chris
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