Hi,

I have this ace data table declaration in a page:

<ace:dataTable
id="someId"
value="#{SomeBean.rows}"
var="row"
scrollable="true"
scrollHeight="450px"
rendered="#{SomeBean.renderCondition}"
stateMap="#{SomeBean.rowStateMap}"
selectionMode="single"
                rowSelectListener="#{SomeBean.rowSelListener}"
                rowUnselectListener="#{SomeBean.rowUnSelListener}"
                >
<ace:ajax event="select" />
<ace:column>
<h:outputText id="someId2" value="#{row.someProperty}" />
</ace:column>
</ace:dataTable>

When I try to access the page I get this exception:

java.lang.NullPointerException
        at org.icefaces.ace.component.datatable.DataTableRenderer.encodeScript(DataTableRenderer.java:512)
        at org.icefaces.ace.component.datatable.DataTableRenderer.encodeEntierty(DataTableRenderer.java:567)
        at org.icefaces.ace.component.datatable.DataTableRenderer.encodeEnd(DataTableRenderer.java:112)
        at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1763)
        at javax.faces.render.Renderer.encodeChildren(Renderer.java:168)
        at org.icefaces.impl.renderkit.RendererWrapper.encodeChildren(RendererWrapper.java:49)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:845)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1756)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1759)
        at org.icefaces.impl.context.DOMPartialViewContext.processPartial(DOMPartialViewContext.java:146)
        at javax.faces.component.UIViewRoot.encodeChildren(UIViewRoot.java:981)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1756)
        at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:390)
        at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
        at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
        at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
        at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539)
        at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1815)
        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:662)

I identified the problem in DataTableRenderer.java row 512: if (table.getHeight() != Integer.MIN_VALUE) writer.write(",height:" + table.getHeight());

It appears that if getHeight returns null when java attempts an out boxing on null it throws a NPE

You should check the components and renderers for similar issues.

Thank you