Hi I tried to set the null value with MyFaces 2.2.4 and it works as expected.
But trying with Mojarra 2.2.7 I get this: javax.faces.component.UpdateModelException: java.lang.NullPointerException at javax.faces.component.UIInput.updateModel(UIInput.java:866) at javax.faces.component.UIInput.processUpdates(UIInput.java:749) at javax.faces.component.UIForm.processUpdates(UIForm.java:281) Caused by: java.lang.NullPointerException at java.util.concurrent.ConcurrentHashMap.put(ConcurrentHashMap.java:1124) at javax.el.MapELResolver.setValue(MapELResolver.java:265) at com.sun.faces.el.DemuxCompositeELResolver._setValue(DemuxCompositeELResolver.java:255) at com.sun.faces.el.DemuxCompositeELResolver.setValue(DemuxCompositeELResolver.java:281) at com.sun.el.parser.AstValue.setValue(AstValue.java:201) at com.sun.el.ValueExpressionImpl.setValue(ValueExpressionImpl.java:291) at org.apache.webbeans.el22.WrappedValueExpression.setValue(WrappedValueExpression.java:95) at com.sun.faces.facelets.el.TagValueExpression.setValue(TagValueExpression.java:131) at javax.faces.component.UIInput.updateModel(UIInput.java:832) ... 34 more Take a look your classpath, probably something is not right. regards, Leonardo 2014-07-03 23:08 GMT-05:00 Paul Spencer <pau...@apache.org>: > MyFaces 2.2.3 & 2.2.4 > jetty-maven-plugin:8.1.15.v20140411 > > Getting NPE when Flow Scope parameter evaluates to null. > > If no value is entered for firstName before “continue” on > campaigns/campaigns.xhtml is clicked, the NPE below thrown. Otherwise the > page2.xhtml is displayed as expected. > > *** > * campaigns/campaigns.xhtml > *** > <h:outputLabel for="firstName" value="First Name" /> > <h:inputText id="firstName" value="#{flowScope.firstName}" > maxlength="10" /> > <h:commandButton value=“Continue” action=“page2” /> > > *** > * campaigns/page2.xhtml > *** > <h:commandButton value=“Exit" action="campaigns-return" /> > <h:outputLabel for="firstName" value="First Name" /> > <h:inputText id=“firstName" value="#{flowScope.firstName}" > maxlength="10" /> > > *** > * Error displayed when page2.xhtml is returned and firstName is null > *** >> java.lang.NullPointerException >> >> viewId=/campaigns/campaigns.xhtml >> location=/Users/paul/Documents/workspace-4.3.2/VenderRollsImporterMockUp/src/main/webapp/campaigns/campaigns.xhtml >> phaseId=UPDATE_MODEL_VALUES(4) >> >> Caused by: >> java.lang.NullPointerException - java.lang.NullPointerException >> at java.util.concurrent.ConcurrentHashMap.put(ConcurrentHashMap.java:1124) >> <HtmlInputText class="class javax.faces.component.html.HtmlInputText” >> clientId="j_id_s:firstName" disabled="false" id="firstName" >> immediate="false" inView="true" localValueSet="true" maxlength="10" >> readonly="false" rendered="true" required="false" size="-2147483648" >> transient="false" valid="false" value="#{flowScope.firstName}" >> location="/campaigns/campaigns.xhtml at line 76 and column 82"/> - State >> size:246 bytes > > *** > * Scopes Value > *** >> Request Parameters >> Name Value >> j_id_s:firstName >> j_id_s:j_id_x Continue >> j_id_s_SUBMIT 1 >> jfwid -lbh0f813a > > > Is this normal? > > Paul Spencer