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Aug 24, 2010
Hi,
I have a web application running with ZK 5.0.8 deployed on WebSpehare 5.1,
when startup the server will generate this error :
Did not realize init() exception thrown by servlet zkLoader: javax.servlet.ServletException
at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doInit(StrictServletInstance.java:99)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._init(StrictLifecycleServlet.java:147)
at com.ibm.ws.webcontainer.servlet.PreInitializedServletState.init(StrictLifecycleServlet.java:270)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.init(StrictLifecycleServlet.java:113)
at com.ibm.ws.webcontainer.servlet.ServletInstance.init(ServletInstance.java:189)
at javax.servlet.GenericServlet.init(GenericServlet.java:258)
at com.ibm.ws.webcontainer.webapp.WebAppServletManager.addServlet(WebAppServletManager.java:876)
at com.ibm.ws.webcontainer.webapp.WebAppServletManager.loadServlet(WebAppServletManager.java:224)
at com.ibm.ws.webcontainer.webapp.WebAppServletManager.loadAutoLoadServlets(WebAppServletManager.java:542)
at com.ibm.ws.webcontainer.webapp.WebApp.loadServletManager(WebApp.java:1442)
at com.ibm.ws.webcontainer.webapp.WebApp.init(WebApp.java:304)
at com.ibm.ws.webcontainer.srt.WebGroup.loadWebApp(WebGroup.java:413)
at com.ibm.ws.webcontainer.srt.WebGroup.init(WebGroup.java:217)
at com.ibm.ws.webcontainer.WebContainer.addWebApplication(WebContainer.java:1019)
at com.ibm.ws.runtime.component.WebContainerImpl.install(WebContainerImpl.java:136)
at com.ibm.ws.runtime.component.WebContainerImpl.start(WebContainerImpl.java:356)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:517)
at com.ibm.ws.runtime.component.DeployedApplicationImpl.fireDeployedObjectStart(DeployedApplicationImpl.java:808)
at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:354)
at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:578)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:311)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:268)
at com.ibm.ws.runtime.component.ContainerImpl.startComponents(ContainerImpl.java:536)
at com.ibm.ws.runtime.component.ContainerImpl.start(ContainerImpl.java:413)
at com.ibm.ws.runtime.component.ApplicationServerImpl.start(ApplicationServerImpl.java:152)
at com.ibm.ws.runtime.component.ContainerImpl.startComponents(ContainerImpl.java:536)
at com.ibm.ws.runtime.component.ContainerImpl.start(ContainerImpl.java:413)
at com.ibm.ws.runtime.component.ServerImpl.start(ServerImpl.java:287)
at com.ibm.ws.runtime.WsServer.start(WsServer.java:128)
at com.ibm.ws.runtime.WsServer.main(WsServer.java:225)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:85)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:58)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:60)
at java.lang.reflect.Method.invoke(Method.java:391)
at com.ibm.ws.bootstrap.WSLauncher.run(WSLauncher.java:222)
at java.lang.Thread.run(Thread.java:838)
---- Begin backtrace for Nested Throwables
java.lang.NullPointerException
at javax.servlet.GenericServlet.log(GenericServlet.java:300)
at javax.servlet.GenericServlet.init(GenericServlet.java:257)
at org.zkoss.zk.ui.http.DHtmlLayoutServlet.init(DHtmlLayoutServlet.java:91)
at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doInit(StrictServletInstance.java:82)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._init(StrictLifecycleServlet.java:147)
at com.ibm.ws.webcontainer.servlet.PreInitializedServletState.init(StrictLifecycleServlet.java:270)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.init(StrictLifecycleServlet.java:113)
at com.ibm.ws.webcontainer.servlet.ServletInstance.init(ServletInstance.java:189)
at javax.servlet.GenericServlet.init(GenericServlet.java:258)
at com.ibm.ws.webcontainer.webapp.WebAppServletManager.addServlet(WebAppServletManager.java:876)
at com.ibm.ws.webcontainer.webapp.WebAppServletManager.loadServlet(WebAppServletManager.java:224)
at com.ibm.ws.webcontainer.webapp.WebAppServletManager.loadAutoLoadServlets(WebAppServletManager.java:542)
at com.ibm.ws.webcontainer.webapp.WebApp.loadServletManager(WebApp.java:1442)
at com.ibm.ws.webcontainer.webapp.WebApp.init(WebApp.java:304)
at com.ibm.ws.webcontainer.srt.WebGroup.loadWebApp(WebGroup.java:413)
at com.ibm.ws.webcontainer.srt.WebGroup.init(WebGroup.java:217)
at com.ibm.ws.webcontainer.WebContainer.addWebApplication(WebContainer.java:1019)
at com.ibm.ws.runtime.component.WebContainerImpl.install(WebContainerImpl.java:136)
at com.ibm.ws.runtime.component.WebContainerImpl.start(WebContainerImpl.java:356)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:517)
at com.ibm.ws.runtime.component.DeployedApplicationImpl.fireDeployedObjectStart(DeployedApplicationImpl.java:808)
at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:354)
at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:578)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:311)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:268)
at com.ibm.ws.runtime.component.ContainerImpl.startComponents(ContainerImpl.java:536)
at com.ibm.ws.runtime.component.ContainerImpl.start(ContainerImpl.java:413)
at com.ibm.ws.runtime.component.ApplicationServerImpl.start(ApplicationServerImpl.java:152)
at com.ibm.ws.runtime.component.ContainerImpl.startComponents(ContainerImpl.java:536)
at com.ibm.ws.runtime.component.ContainerImpl.start(ContainerImpl.java:413)
at com.ibm.ws.runtime.component.ServerImpl.start(ServerImpl.java:287)
at com.ibm.ws.runtime.WsServer.start(WsServer.java:128)
at com.ibm.ws.runtime.WsServer.main(WsServer.java:225)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:85)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:58)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:60)
at java.lang.reflect.Method.invoke(Method.java:391)
at com.ibm.ws.bootstrap.WSLauncher.run(WSLauncher.java:222)
at java.lang.Thread.run(Thread.java:838)
[9/2/11 8:44:21:109 CEST] 41684168 WebGroup E SRVE0020E: [Servlet Error]-: Failed to load servlet: java.lang.NullPointerException
at javax.servlet.GenericServlet.log(GenericServlet.java:300)
at javax.servlet.GenericServlet.init(GenericServlet.java:257)
at org.zkoss.zk.ui.http.DHtmlLayoutServlet.init(DHtmlLayoutServlet.java:91)
at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doInit(StrictServletInstance.java:82)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._init(StrictLifecycleServlet.java:147)
at com.ibm.ws.webcontainer.servlet.PreInitializedServletState.init(StrictLifecycleServlet.java:270)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.init(StrictLifecycleServlet.java:113)
at com.ibm.ws.webcontainer.servlet.ServletInstance.init(ServletInstance.java:189)
at javax.servlet.GenericServlet.init(GenericServlet.java:258)
at com.ibm.ws.webcontainer.webapp.WebAppServletManager.addServlet(WebAppServletManager.java:876)
at com.ibm.ws.webcontainer.webapp.WebAppServletManager.loadServlet(WebAppServletManager.java:224)
at com.ibm.ws.webcontainer.webapp.WebAppServletManager.loadAutoLoadServlets(WebAppServletManager.java:542)
at com.ibm.ws.webcontainer.webapp.WebApp.loadServletManager(WebApp.java:1442)
at com.ibm.ws.webcontainer.webapp.WebApp.init(WebApp.java:304)
at com.ibm.ws.webcontainer.srt.WebGroup.loadWebApp(WebGroup.java:413)
at com.ibm.ws.webcontainer.srt.WebGroup.init(WebGroup.java:217)
at com.ibm.ws.webcontainer.WebContainer.addWebApplication(WebContainer.java:1019)
at com.ibm.ws.runtime.component.WebContainerImpl.install(WebContainerImpl.java:136)
at com.ibm.ws.runtime.component.WebContainerImpl.start(WebContainerImpl.java:356)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:517)
at com.ibm.ws.runtime.component.DeployedApplicationImpl.fireDeployedObjectStart(DeployedApplicationImpl.java:808)
at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:354)
at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:578)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:311)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:268)
at com.ibm.ws.runtime.component.ContainerImpl.startComponents(ContainerImpl.java:536)
at com.ibm.ws.runtime.component.ContainerImpl.start(ContainerImpl.java:413)
at com.ibm.ws.runtime.component.ApplicationServerImpl.start(ApplicationServerImpl.java:152)
at com.ibm.ws.runtime.component.ContainerImpl.startComponents(ContainerImpl.java:536)
at com.ibm.ws.runtime.component.ContainerImpl.start(ContainerImpl.java:413)
at com.ibm.ws.runtime.component.ServerImpl.start(ServerImpl.java:287)
at com.ibm.ws.runtime.WsServer.start(WsServer.java:128)
at com.ibm.ws.runtime.WsServer.main(WsServer.java:225)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:85)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:58)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:60)
at java.lang.reflect.Method.invoke(Method.java:391)
at com.ibm.ws.bootstrap.WSLauncher.run(WSLauncher.java:222)
at java.lang.Thread.run(Thread.java:838)
Can anyone help me with this issue?
Thank you
Marco
very weird, the NPE comes from GenericServlet log.
do you running in cluster environment, can you help us to reduce to old version of zk and check again, thanks
hi, please follow this http://tracker.zkoss.org/browse/ZK-389
We added the callback of GenericServlet's init() in 5.0.8 (since some users want to extend from DHtmlLayoutServlet and access getServletConfig()). However, the invocation is very typical as shown below. Could you clean up the environment and try again?
public void init(ServletConfig config) throws ServletException {
super.init(config);What is Java Servlet's version that Websphere 5.1 supports?
Anyway, I check the source code shipped with Tomcat 5.5/6.0. The implementation of GenericServlet is straightforward:
public void init(ServletConfig config) throws ServletException {
this.config = config;
this.init();
}
public void init() throws ServletException {
}
How does it cause NPE? Does WS 5.1 has its own implementation?
I checked tomcat servlet source too, no reason could throws NPE in the very simple, code.
zicardi, could you provide jar file that contains GenericServlet in websphere? I can do de-compile to see what is going.
Hi zicardi,
Could you tell us which Java version are you using?
For the error log, it seems like to write some log caused the error exception.
java.lang.NullPointerException at javax.servlet.GenericServlet.log(GenericServlet.java:300) at javax.servlet.GenericServlet.init(GenericServlet.java:257)
I search from google with the same error line, here is the one matched the error. tomcat 3.2.1 on Windows NT as a service, using JDK 1.2.1
please mail to dennischen at zkoss dot org
Asked: 2011-09-02 01:50:09 +0800
Seen: 509 times
Last updated: Sep 05 '11
