Problems deploying web app - NullPointerException

Hi - I'm trying to deploy a web app and am running into an NPE. I've tested the web app with a straight Tomcat installation, and it runs fine, but when I try to deploy with WSO2 gadget server, the web app fails to start, and on shutdown/restart of the wso2 server, the wso2 server fails to restart. I'm a bit new to this - thanks in advance for your help. Susan Error log on deployment: [2011-10-22 18:54:44,709] ERROR {org.apache.catalina.core.ContainerBase.[Tomcat].[defaulthost].[/lh-d2r]} - Exception sending context initialized event to listener instance of class de.fuberlin.wiwiss.d2rs.WebappInitListener java.lang.NullPointerException at de.fuberlin.wiwiss.d2rs.ConfigLoader.toAbsoluteURI(ConfigLoader.java:35) at de.fuberlin.wiwiss.d2rs.WebappInitListener.absolutize(WebappInitListener.java:50) at de.fuberlin.wiwiss.d2rs.WebappInitListener.contextInitialized(WebappInitListener.java:25) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4723) at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5226) at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5221) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:680) [2011-10-22 18:54:44,710] ERROR {org.apache.catalina.core.StandardContext} - Error listenerStart [2011-10-22 18:54:44,710] ERROR {org.apache.catalina.core.StandardContext} - Context [/lh-d2r] startup failed due to previous errors [2011-10-22 18:54:44,718] ERROR {org.wso2.carbon.server.TomcatGenericWebappsDeployer} - Cannot deploy webapp: StandardContext[lh-d2r.war].File[/opt/wso2gs-1.4.0/repository/deployment/server/webapps/lh-d2r.war] org.wso2.carbon.tomcat.BetterTomcatException: Webapp StandardEngine[Tomcat].StandardHost[defaulthost].StandardContext[/lh-d2r] failed to deploy at org.wso2.carbon.tomcat.BetterTomcat.addWebapp(BetterTomcat.java:105) at org.wso2.carbon.server.TomcatGenericWebappsDeployer.handleWebappDeployment(TomcatGenericWebappsDeployer.java:189) at org.wso2.carbon.server.TomcatGenericWebappsDeployer.handleWarWebappDeployment(TomcatGenericWebappsDeployer.java:151) at org.wso2.carbon.server.TomcatGenericWebappsDeployer.handleHotDeployment(TomcatGenericWebappsDeployer.java:123) at org.wso2.carbon.server.TomcatGenericWebappsDeployer.deploy(TomcatGenericWebappsDeployer.java:95) at org.wso2.carbon.webapp.mgt.WebappDeployer.deploy(WebappDeployer.java:80) at org.apache.axis2.deployment.repository.util.DeploymentFileData.deploy(DeploymentFileData.java:136) at org.apache.axis2.deployment.DeploymentEngine.doDeploy(DeploymentEngine.java:813) at org.apache.axis2.deployment.repository.util.WSInfoList.update(WSInfoList.java:144) at org.apache.axis2.deployment.RepositoryListener.update(RepositoryListener.java:371) at org.apache.axis2.deployment.RepositoryListener.checkServices(RepositoryListener.java:254) at org.apache.axis2.deployment.RepositoryListener.startListener(RepositoryListener.java:365) at org.apache.axis2.deployment.scheduler.SchedulerTask.checkRepository(SchedulerTask.java:73) at org.apache.axis2.deployment.scheduler.SchedulerTask.run(SchedulerTask.java:94) at org.apache.axis2.deployment.scheduler.Scheduler$SchedulerTimerTask.run(Scheduler.java:93) at java.util.TimerThread.mainLoop(Timer.java:512) at java.util.TimerThread.run(Timer.java:462) [2011-10-22 18:54:44,719] ERROR {org.wso2.carbon.webapp.mgt.WebappDeployer} - Error occurred while deploying webapp /opt/wso2gs-1.4.0/repository/deployment/server/webapps/lh-d2r.war org.wso2.carbon.CarbonException: Cannot deploy webapp: StandardContext[lh-d2r.war].File[/opt/wso2gs-1.4.0/repository/deployment/server/webapps/lh-d2r.war] at org.wso2.carbon.server.TomcatGenericWebappsDeployer.handleWebappDeployment(TomcatGenericWebappsDeployer.java:212) at org.wso2.carbon.server.TomcatGenericWebappsDeployer.handleWarWebappDeployment(TomcatGenericWebappsDeployer.java:151) at org.wso2.carbon.server.TomcatGenericWebappsDeployer.handleHotDeployment(TomcatGenericWebappsDeployer.java:123) at org.wso2.carbon.server.TomcatGenericWebappsDeployer.deploy(TomcatGenericWebappsDeployer.java:95) at org.wso2.carbon.webapp.mgt.WebappDeployer.deploy(WebappDeployer.java:80) at org.apache.axis2.deployment.repository.util.DeploymentFileData.deploy(DeploymentFileData.java:136) at org.apache.axis2.deployment.DeploymentEngine.doDeploy(DeploymentEngine.java:813) at org.apache.axis2.deployment.repository.util.WSInfoList.update(WSInfoList.java:144) at org.apache.axis2.deployment.RepositoryListener.update(RepositoryListener.java:371) at org.apache.axis2.deployment.RepositoryListener.checkServices(RepositoryListener.java:254) at org.apache.axis2.deployment.RepositoryListener.startListener(RepositoryListener.java:365) at org.apache.axis2.deployment.scheduler.SchedulerTask.checkRepository(SchedulerTask.java:73) at org.apache.axis2.deployment.scheduler.SchedulerTask.run(SchedulerTask.java:94) at org.apache.axis2.deployment.scheduler.Scheduler$SchedulerTimerTask.run(Scheduler.java:93) at java.util.TimerThread.mainLoop(Timer.java:512) at java.util.TimerThread.run(Timer.java:462) Caused by: org.wso2.carbon.tomcat.BetterTomcatException: Webapp StandardEngine[Tomcat].StandardHost[defaulthost].StandardContext[/lh-d2r] failed to deploy at org.wso2.carbon.tomcat.BetterTomcat.addWebapp(BetterTomcat.java:105) at org.wso2.carbon.server.TomcatGenericWebappsDeployer.handleWebappDeployment(TomcatGenericWebappsDeployer.java:189) ... 15 more Error on restart of WSO2 gadget server: /opt/wso2gs-1.4.0 [625] > ./bin/wso2server.sh JAVA_HOME environment variable is set to /usr CARBON_HOME environment variable is set to /opt/wso2gs-1.4.0 Unable to find a $JAVA_HOME at "/usr", continuing with system-provided Java... INFO [main] (Main.java:61) - Initializing system... INFO [main] (TomcatServer.java:141) - Using UserManager based TomcatRealm INFO [main] (HttpTransport.java:70) - Created Connector [HTTP_11_NIO://*:8080] INFO [main] (HttpTransport.java:70) - Created Connector [HTTPS_11_NIO://*:8443] INFO [main] (TomcatCarbonWebappDeployer.java:81) - Deployed Carbon webapp: StandardEngine[Tomcat].StandardHost[defaulthost].StandardContext[/] INFO [main] (AbstractProtocolHandler.java:323) - Initializing ProtocolHandler ["http-nio-8080"] INFO [main] (AbstractProtocolHandler.java:323) - Initializing ProtocolHandler ["http-nio-8443"] INFO [main] (StandardService.java:437) - Starting service Tomcat INFO [main] (TransactionFactory.java:34) - Starting Atomikos Transaction Manager 3.7.0 INFO [main] (Slf4jConsole.java:110) - USING core version: 3.7.0 INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.console_file_name = tm.out INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.console_file_count = 1 INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.automatic_resource_registration = true INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.client_demarcation = false INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.threaded_2pc = false INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.serial_jta_transactions = true INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.log_base_dir = repository/data INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.console_log_level = INFO INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.max_actives = 50 INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.checkpoint_interval = 500 INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.enable_logging = true INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.output_dir = repository/logs INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.log_base_name = tmlog INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.console_file_limit = 1073741824 INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.max_timeout = 8000000 INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.tm_unique_name = 127.0.0.1.tm INFO [main] (Slf4jConsole.java:110) - USING java.naming.factory.initial = com.sun.jndi.rmi.registry.RegistryContextFactory INFO [main] (Slf4jConsole.java:110) - USING java.naming.provider.url = rmi://localhost:1099 INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.service = com.atomikos.icatch.standalone.UserTransactionServiceFactory INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.force_shutdown_on_vm_exit = true INFO [main] (Slf4jConsole.java:110) - USING com.atomikos.icatch.default_jta_timeout = 5000000 INFO [main] (StandardEngine.java:288) - Starting Servlet Engine: Apache Tomcat/7.0.14 INFO [main] (ContextConfig.java:1194) - No global web.xml found java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.wso2.carbon.bootstrap.Bootstrap.loadClass(Bootstrap.java:62) at org.wso2.carbon.bootstrap.Bootstrap.main(Bootstrap.java:43) Caused by: java.lang.NoSuchMethodError: javax.servlet.ServletContext.getSessionCookieConfig()Ljavax/servlet/SessionCookieConfig; at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1281) at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1331) at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:881) at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:316) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:89) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5103) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1033) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:774) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1033) at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:291) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:727) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) at org.apache.catalina.startup.Tomcat.start(Tomcat.java:305) at org.wso2.carbon.tomcat.BetterTomcat.start(BetterTomcat.java:68) at org.wso2.carbon.server.TomcatServer.start(TomcatServer.java:109) at org.wso2.carbon.server.Main.startServer(Main.java:64) at org.wso2.carbon.server.Main.start(Main.java:156) ... 6 more INFO [Thread-2] (Slf4jConsole.java:110) - THREADS: using JDK thread pooling...