Hello,

I use on my application a web listener ( ServletContextListener ) that
allows you to compile jsp at startup .

It does not work on Tomcat 8 in call :
servletContext.getRequestDispatcher ( path);


Here is the stack :

org.apache.catalina.core.ApplicationContext.log Error during mapping
 java.lang.NullPointerException
at org.apache.catalina.mapper.Mapper.internalMapWrapper(Mapper.java:842)
at org.apache.catalina.mapper.Mapper.map(Mapper.java:712)
at
org.apache.catalina.core.ApplicationContext.getRequestDispatcher(ApplicationContext.java:503)
at
org.apache.catalina.core.ApplicationContextFacade.getRequestDispatcher(ApplicationContextFacade.java:221)
at
fr.ms.tomcat.servlet.listener.JspCompileRunnable.run(JspCompileRunnable.java:25)
 This is occurs when the map contextObjectToContextVersionMap is still null.

It is enriched at the end of the boot StandardServer so after initializing
listeners .

Thread [main] (Suspended (breakpoint at line 265 in Mapper))
owns: MapperListener  (id=456)
owns: StandardService  (id=457)
owns: Object  (id=458)
owns: StandardServer  (id=459)
Mapper.addContextVersion(String, Host, String, String, Context, String[],
WebResourceRoot, Collection<WrapperMappingInfo>) line: 265
MapperListener.registerContext(Context) line: 380
MapperListener.registerHost(Host) line: 302
MapperListener.startInternal() line: 110
MapperListener(LifecycleBase).start() line: 150
StandardService.startInternal() line: 450
StandardService(LifecycleBase).start() line: 150
StandardServer.startInternal() line: 769
StandardServer(LifecycleBase).start() line: 150
Catalina.start() line: 625
NativeMethodAccessorImpl.invoke0(Method, Object, Object[]) line: not
available [native method]
NativeMethodAccessorImpl.invoke(Object, Object[]) line: 57
DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 43
Method.invoke(Object, Object...) line: 606
Bootstrap.start() line: 351
Bootstrap.main(String[]) line: 485



it works fine with tomcat 5, 6 and 7.


Environnement :
apache- tomcat- 8.0.15 or apache -tomcat- 8.0.18
Windows 8.1
Java 7 update 75


Thank you.

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