StandardWrapperValve[Faces Servlet]: PWC1406: Servlet.service() for servlet Faces Servlet

[massimo tarantelli]

Hello to everybody,
I have this error when I click on some p:commandButton (I'm using primefaces) in my web application.
I don't understain what I have to check, where the servlet engine find the Null, because i don't understaind what does it appen afther I click.
Here the error stack.

StandardWrapperValve[Faces Servlet]: PWC1406: Servlet.service() for servlet Faces Servlet threw exception
java.lang.NullPointerException
	at org.primefaces.component.datatable.DataHelper.decodeMultipleSelection(DataHelper.java:263)
	at org.primefaces.component.datatable.DataHelper.decodeSelection(DataHelper.java:252)
	at org.primefaces.component.datatable.DataTableRenderer.decode(DataTableRenderer.java:69)
	at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:787)
	at javax.faces.component.UIData.processDecodes(UIData.java:1162)
	at org.primefaces.component.datatable.DataTable.processDecodes(DataTable.java:571)
	at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1176)
	at org.primefaces.component.tabview.TabView.processDecodes(TabView.java:302)
	at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1176)
	at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1176)
	at org.primefaces.component.panel.Panel.processDecodes(Panel.java:277)
	at javax.faces.component.UIForm.processDecodes(UIForm.java:225)
	at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1176)
	at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1176)
	at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:933)
	at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78)
	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
	at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
	at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1542)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
	at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:77)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
	at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
	at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
	at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
	at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849)
	at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746)
	at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045)
	at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228)
	at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
	at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
	at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
	at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
	at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
	at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
	at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
	at java.lang.Thread.run(Thread.java:722)

thanks
Massimo

[massimo tarantelli]

solved,
It was related to a p:dataTable, in particular the "selectionMode" attribute.
thanks
Massimo