Null Pointer exception when using GUI (1.3.0 release)

[tomas-knap]

Problem on release 1.3.0 (debian package):

2014-09-09 23:43:16,067 [http-bio-8080-exec-2] ERROR cz.cuni.mff.xrg.odcs.frontend.AppEntry - Uncaught exception
java.lang.NullPointerException: null
at com.vaadin.ui.AbstractComponentContainer.removeComponent(AbstractComponentContainer.java:228) ~[vaadin-server-7.1.8.jar:7.1.8]
at com.vaadin.ui.AbstractOrderedLayout.removeComponent(AbstractOrderedLayout.java:166) ~[vaadin-server-7.1.8.jar:7.1.8]
at cz.cuni.mff.xrg.odcs.frontend.gui.views.dpu.DPUViewImpl.selectNewDPU(DPUViewImpl.java:786) ~[DPUViewImpl.class:na]
at cz.cuni.mff.xrg.odcs.frontend.gui.views.dpu.DPUPresenterImpl.selectDPUEventHandler(DPUPresenterImpl.java:283) ~[DPUPresenterImpl.class:na]
at cz.cuni.mff.xrg.odcs.frontend.gui.views.dpu.DPUViewImpl$4.itemClick(DPUViewImpl.java:253) ~[DPUViewImpl$4.class:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_65]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_65]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_65]
at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_65]
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:508) ~[vaadin-server-7.1.8.jar:7.1.8]
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:167) ~[vaadin-server-7.1.8.jar:7.1.8]
at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:969) ~[vaadin-server-7.1.8.jar:7.1.8]
at com.vaadin.ui.Tree.changeVariables(Tree.java:470) ~[vaadin-server-7.1.8.jar:7.1.8]
at com.vaadin.server.communication.ServerRpcHandler.changeVariables(ServerRpcHandler.java:396) [vaadin-server-7.1.8.jar:7.1.8]
at com.vaadin.server.communication.ServerRpcHandler.handleBurst(ServerRpcHandler.java:221) [vaadin-server-7.1.8.jar:7.1.8]
at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:111) [vaadin-server-7.1.8.jar:7.1.8]
at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:91) [vaadin-server-7.1.8.jar:7.1.8]
at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:37) [vaadin-server-7.1.8.jar:7.1.8]
at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1371) [vaadin-server-7.1.8.jar:7.1.8]
at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:238) [vaadin-server-7.1.8.jar:7.1.8]
at cz.cuni.mff.xrg.odcs.frontend.ODCSApplicationServlet.service(ODCSApplicationServlet.java:79) [ODCSApplicationServlet.class:na]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) [tomcat-servlet-api-3.0.jar:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) [tomcat-catalina-7.0.26.jar:7.0.26]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) [tomcat-catalina-7.0.26.jar:7.0.26]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) [tomcat-catalina-7.0.26.jar:7.0.26]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) [tomcat-catalina-7.0.26.jar:7.0.26]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) [tomcat-catalina-7.0.26.jar:7.0.26]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) [tomcat-catalina-7.0.26.jar:7.0.26]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) [tomcat-catalina-7.0.26.jar:7.0.26]
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) [tomcat-catalina-7.0.26.jar:7.0.26]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) [tomcat-catalina-7.0.26.jar:7.0.26]

steps to reproduce will be added

[tomas-knap]

Steps to reproduce:

install the latest debian packages
configure it so that it runs
remove the commons-module-1.0.0.jar for /var/lib/unifiedViews/target/lib/
restart the services

open unified views
login
select tab dpu templates
click on extractors
=> error

[tomas-knap]

@mvi-eea-sk Could you please check from the description above whether it is corrected in the current develop branch or whether it still appears?

[tomas-knap]

There is a bug, when clicking on one of the categories (Extractors, transformers, loaders) the null pointer appears. Simple check should be added and when user clicks on the category (Extractors, transformers, loaders), such error should not be produces, but he category should be expanded or collapsed.

[tomas-knap]

Would be good to fix for the 1.3.1 release as it should be a correction for less than 1hour and it is quite annoying