why getViewId is so strange and thus wrong ?????

[rockyzheng]

I used a4j in my project and envir was netbeans 5.5, a4j lates version of 1.1.1. But I found a strange question as following :
When I navigated from one page to another , the getViewId function returned a strange viewId such as "/" or " /<??????è??????????>" .
then exception was threw.

I didn't know why it happend and also tried to resolve it ,but failed .

Of cource, I did could avoid the exception by registing my own PhaseListener to catch the wrong viewId and call faceContext.responseComplete .

But now ,I want to know why this happened ,it's strange and I can't face it again !

Thanks if you could give me advice ......

[ilya_shaikovsky]

Seems we need more info. War file will be most helpfull to see what happens.

[rockyzheng]

if not using my own phaseListener ,it reported the following exception:

- Servlet.service() for servlet Faces Servlet threw exception
com.sun.faces.el.impl.parser.ParseException: Encountered "}" at line 1, column 3.
Was expecting one of:
<INTEGER_LITERAL> ...
<FLOATING_POINT_LITERAL> ...
<STRING_LITERAL> ...
"true" ...
"false" ...
"null" ...
"(" ...
"-" ...
"not" ...
"!" ...
"empty" ...
...

at com.sun.faces.el.impl.parser.ELParserImpl.generateParseException(ELParserImpl.java:2234)
at com.sun.faces.el.impl.parser.ELParserImpl.jj_consume_token(ELParserImpl.java:2102)
at com.sun.faces.el.impl.parser.ELParserImpl.Expression(ELParserImpl.java:140)
at com.sun.faces.el.impl.parser.ELParserImpl.AttrValueExpression(ELParserImpl.java:109)
at com.sun.faces.el.impl.parser.ELParserImpl.ExpressionString(ELParserImpl.java:50)
at com.sun.faces.el.impl.ExpressionEvaluatorImpl.parseExpressionString(ExpressionEvaluatorImpl.java:282)
at com.sun.faces.el.impl.ExpressionEvaluatorImpl.parseExpression(ExpressionEvaluatorImpl.java:199)
at com.sun.faces.application.ApplicationImpl.checkSyntax(ApplicationImpl.java:785)
at com.sun.faces.application.ApplicationImpl.createValueBinding(ApplicationImpl.java:291)
at com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl.pageBean(ViewHandlerImpl.java:662)
at com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl.pageBean(ViewHandlerImpl.java:641)
at com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl.renderView(ViewHandlerImpl.java:249)
at org.ajax4jsf.framework.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
at org.ajax4jsf.framework.ajax.AjaxViewHandler.renderView(AjaxViewHandler.java:229)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:225)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:194)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:96)
at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:220)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.sun.rave.web.ui.util.UploadFilter.doFilter(UploadFilter.java:198)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java
:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
at java.lang.Thread.run(Thread.java:595)




the project start page is Login.jsp ,if I wrote url in browser another jsp such as register.jsp ,it would be wrong and throw the upper exception .

And also I wonder the question .if I filled the right info and then it will navigate to right page ,but if wrong info and call "return null " back to the same page, then exception will be threw !

My msn is [e-mail] and goole talk is [e-mail] . I'm very glad to get yours instant touch info .