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Posted to users@tomcat.apache.org by Christopher Schultz <ch...@christopherschultz.net> on 2024/04/15 15:08:48 UTC
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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RE: [EXT]Re: .intermittent InvocationTargetException errors
Posted by Jo...@wellsfargo.com.INVALID.
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 <us...@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
RNoel@westwoodone.com<ma...@westwoodone.com>
-----Original Message-----
From: Christopher Schultz <ch...@christopherschultz.net>>
Sent: Monday, April 15, 2024 11:09 AM
To: users@tomcat.apache.org<ma...@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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Re: [EXT]Re: .intermittent InvocationTargetException errors
Posted by Christopher Schultz <ch...@christopherschultz.net>.
Rick,
On 4/15/24 11:29, Rick Noel wrote:
> 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)
The compiler is working. Whatever RadioVoodoo is is causing this error.
I can see that the JSP compiler has finished because the call stack
includes
org.apache.jsp.services.system.contesting.contest_005fschedule_005fedit_jsp._jspService
which means your services/system/contesting/contest-schedule-edit.jsp
has been compiled successfully.
RadioVoodoo appears to be a JSP tag library and I'm guessing that it's
being invoked to perform some kind of expression evaluation and THAT is
failing.
You might need to reach out to the RadioVoodoo people to find out what's
happening...
> 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
Well, that tells you what is really happening: you have a null reference
and you are trying to make a call on it. RadioVoodoo is allowing you to
try to invoke a method on a null reference and getting an NPE for its
trouble. The rest of the details are below:
> 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)
-chris
> -----Original Message-----
> From: Christopher Schultz <ch...@christopherschultz.net>
> Sent: Monday, April 15, 2024 11:09 AM
> To: 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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RE: [EXT]Re: .intermittent InvocationTargetException errors
Posted by Rick Noel <RN...@westwoodone.com.INVALID>.
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
RNoel@westwoodone.com
-----Original Message-----
From: Christopher Schultz <ch...@christopherschultz.net>
Sent: Monday, April 15, 2024 11:09 AM
To: 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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