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[jetty-users] Maven Jetty Plug-in + WebApplicationInitializer throw NPE on reload
|
Hi,
I have created a simple tutorial project that uses Spring 3.2 web
application without web.xml, using WebApplicationInitializer mechanism
instead.
However, whenever I setup manual reloading within Maven plugin:
<configuration>
<reload>manual</reload>
</configuration>
and press Enter within the console, the application context gets
reloaded, but the WebApplicationInitializer throws a
NullPointerException (see below)
I am attaching a simple project, which indicated that the reason may lie
in the WebApplicationInitializer or the servletcontext not being
properly cleaned up in the undeployment phase. The actual line is:
ServletRegistration.Dynamic dispatcher =
servletContext.addServlet("dispatcher", new DispatcherServlet(ctx));
while addServlet() method returns null whenever the servlet is already
mapped. However, the freshly deployed application should not have this
servlet already mapped and it should not return null.
This issue affects the 8.1.x branch as well, the last version of Jetty
Maven plug-in that works without NPEs is the 8.1.9.v20130131.
The exception is:
java.lang.NullPointerException
at
jettybug.WebApplicationInitializer.onStartup(WebApplicationInitializer.java:22)
at
org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:180)
at
org.eclipse.jetty.plus.annotation.ContainerInitializer.callStartup(ContainerInitializer.java:105)
at
org.eclipse.jetty.annotations.ServletContainerInitializerListener.doStart(ServletContainerInitializerListener.java:107)
at
org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:69)
at
org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:108)
at
org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:82)
Robert
Attachment:
jetty-webinitializer-npe.zip
Description: Zip compressed data