What about setting a NPE breakpoint in your debugger? Then you will see what is causing the NPE…
Am 11.07.2013 um 19:43 schrieb Zhengyuan Shen <[email protected]> > Hi everyone, > > I am implementing the function below in my Jenkins plugin. > > Utilities.login(uri, username, password); > > If I put this function inside the perform() function then there is no > problem, but if I put it inside a doFillDropdownItems() function, it gives > error like this: > > java.lang.reflect.InvocationTargetException > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:601) > at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:288) > at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:151) > at > org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:90) > at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:111) > at > org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53) > at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:677) > at org.kohsuke.stapler.Stapler.invoke(Stapler.java:770) > at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:241) > at > org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53) > at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:677) > at org.kohsuke.stapler.Stapler.invoke(Stapler.java:770) > at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:241) > at > org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53) > at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:677) > at org.kohsuke.stapler.Stapler.invoke(Stapler.java:770) > at org.kohsuke.stapler.Stapler.invoke(Stapler.java:583) > at org.kohsuke.stapler.Stapler.service(Stapler.java:214) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) > at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:491) > at > org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1074) > at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:95) > at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:87) > at > org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065) > at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:48) > at > org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065) > at > hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84) > at > hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76) > at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164) > at > org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065) > at > org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:50) > at > org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065) > at > hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81) > at > org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065) > at > org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365) > at > org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:185) > at > org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) > at > org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:689) > at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:391) > at > org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:146) > at > org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114) > at > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139) > at org.mortbay.jetty.Server.handle(Server.java:285) > at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:457) > at > org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:765) > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:628) > at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:209) > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:357) > at > org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:329) > at > org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:475) > > Caused by: java.lang.NullPointerException > at the line of the login function call > > > I hard coded all the uri, username, password, and I really have no idea how > can there be any null pointers. > > > > Does anyone have any idea of why this happens? > > Thanks, > > > > > -- > You received this message because you are subscribed to the Google Groups > "Jenkins Developers" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > > -- You received this message because you are subscribed to the Google Groups "Jenkins Developers" group. 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