IceFaces Duplicate component id error

From Foochal

Exception stacktrace

SEVERE: Servlet.service() for servlet Persistent Faces Servlet threw exception
javax.faces.FacesException: Can't parse stream for /index.jspx Failed to execute JSP lifecycle.
	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:517)
	at com.icesoft.faces.application.D2DViewHandler.renderView(D2DViewHandler.java:149)
	at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:107)
	at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:268)
	at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:137)
	at com.icesoft.faces.webapp.xmlhttp.PersistentFacesServlet.service(PersistentFacesServlet.java:394)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
	at java.lang.Thread.run(Thread.java:595)
Caused by: javax.faces.FacesException: Failed to execute JSP lifecycle.
	at com.icesoft.faces.webapp.parser.Parser.parse(Parser.java:140)
	at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:502)
	... 20 more
Caused by: java.lang.IllegalStateException: Duplicate component ID : _id9
	at com.icesoft.faces.webapp.parser.Parser.executeJspLifecycle(Parser.java:176)
	at com.icesoft.faces.webapp.parser.Parser.executeJspLifecycle(Parser.java:186)
	at com.icesoft.faces.webapp.parser.Parser.executeJspLifecycle(Parser.java:186)
	at com.icesoft.faces.webapp.parser.Parser.executeJspLifecycle(Parser.java:186)
	at com.icesoft.faces.webapp.parser.Parser.executeJspLifecycle(Parser.java:186)
	at com.icesoft.faces.webapp.parser.Parser.executeJspLifecycle(Parser.java:186)
	at com.icesoft.faces.webapp.parser.Parser.parse(Parser.java:134)
	... 21 more

Solution

I was using <ice:panelBorder> with facets for north, east, ... components.

<f:facet name="north">
 north
</f:facet>
<f:facet name="south">
 south
</f:facet>

It is required to wrap any child components of panelBorder facets in container tags. The following fixed the problem.

<f:facet name="north">
 <ice:panelGroup>
  north
 </ice:panelGroup>
</f:facet>
<f:facet name="south">
 <ice:panelGroup>
  south
 </ice:panelGroup>
</f:facet>