Hello Folks,

Now that I know that XWiki logs everything to xwiki.log (thanks Vincent!), I'm including the entire log that is written when I attempt to modify the Page Layout.

A full description of my problem can be found in the thread below.  Any help is appreciated.  Thanks.

16:22:30,727 [P1-18] ERROR log.SimpleLog4JLogSystem        - Left side ($first) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. Panels.PanelWizard [line 6, column 14]
16:22:30,747 [P1-18] ERROR log.SimpleLog4JLogSystem        - Left side ($first) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. Panels.PanelWizard [line 6, column 14]
16:22:30,747 [P1-18] ERROR log.SimpleLog4JLogSystem        - Left side ($first) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. Panels.PanelWizard [line 6, column 14]
16:25:55,368 [P1-18] WARN  web.XWikiAction                 - Uncaught exception: Error number 0 in 11: Uncaught exception
Wrapped Exception: null
com.xpn.xwiki.XWikiException: Error number 0 in 11: Uncaught exception
Wrapped Exception: null
        at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:165)
        at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
        at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:596)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
        at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:830)
        at com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:118)
        at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
        at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:471)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
        at org.mortbay.http.HttpContext.handle(HttpContext.java:1565)
        at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:633)
        at org.mortbay.http.HttpContext.handle(HttpContext.java:1517)
        at org.mortbay.http.HttpServer.service(HttpServer.java:954)
        at org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
        at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:983)
        at org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
        at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
        at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
        at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)


Wrapped Exception:


java.lang.IllegalStateException
        at org.mortbay.jetty.servlet.ServletHttpResponse.getWriter(ServletHttpResponse.java:564)
        at com.xpn.xwiki.web.XWikiServletResponse.getWriter(XWikiServletResponse.java:93)
        at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:120)
        at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:159)
        at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
        at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:596)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
        at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:830)
        at com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:118)
        at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
        at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:471)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
        at org.mortbay.http.HttpContext.handle(HttpContext.java:1565)
        at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:633)
        at org.mortbay.http.HttpContext.handle(HttpContext.java:1517)
        at org.mortbay.http.HttpServer.service(HttpServer.java:954)
        at org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
        at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:983)
        at org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
        at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
        at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
        at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
16:31:09,292 [P1-19] WARN  web.XWikiAction                 - Uncaught exception: Error number 0 in 11: Uncaught exception
Wrapped Exception: null
com.xpn.xwiki.XWikiException: Error number 0 in 11: Uncaught exception
Wrapped Exception: null
        at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:165)
        at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
        at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:596)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
        at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:830)
        at com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:118)
        at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
        at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:471)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
        at org.mortbay.http.HttpContext.handle(HttpContext.java:1565)
        at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:633)
        at org.mortbay.http.HttpContext.handle(HttpContext.java:1517)
        at org.mortbay.http.HttpServer.service(HttpServer.java:954)
        at org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
        at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:983)
        at org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
        at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
        at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
        at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)


Wrapped Exception:


java.lang.IllegalStateException
        at org.mortbay.jetty.servlet.ServletHttpResponse.getWriter(ServletHttpResponse.java:564)
        at com.xpn.xwiki.web.XWikiServletResponse.getWriter(XWikiServletResponse.java:93)
        at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:120)
        at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:159)
        at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
        at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:596)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
        at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:830)
        at com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:118)
        at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
        at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:471)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
        at org.mortbay.http.HttpContext.handle(HttpContext.java:1565)
        at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:633)
        at org.mortbay.http.HttpContext.handle(HttpContext.java:1517)
        at org.mortbay.http.HttpServer.service(HttpServer.java:954)
        at org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
        at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:983)
        at org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
        at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
        at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
        at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
16:32:42,379 [P1-18] ERROR log.SimpleLog4JLogSystem        - Left side ($first) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. Panels.PanelWizard [line 6, column 14]
16:32:42,389 [P1-18] ERROR log.SimpleLog4JLogSystem        - Left side ($first) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. Panels.PanelWizard [line 6, column 14]
16:32:42,399 [P1-18] ERROR log.SimpleLog4JLogSystem        - Left side ($first) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. Panels.PanelWizard [line 6, column 14]

Regards,
Justin Robbins


justin_robbins@cotyinc.com

07/19/2007 04:34 PM
Please respond to
xwiki-users@objectweb.org
To
xwiki-users@objectweb.org
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Subject
[xwiki-users] Can't adjust Page Layout in Panel Wizard





Hello everyone,

I tried to use the Panel Wizard to change the Page Layout from the default setting of "Right Column" to "Left Column".  When I clicked "Save the new layout" I received a prompt "The layout has been saved properly".  However, a stack trace was written to the console.  I am now left with no side columns at all.

What am I doing wrong?

Here's the message that is now written to the console when I navigate to the Panel Wizard page.

16:22:30,727 ERROR P1-18 http://localhost:8080/xwiki/bin/view/Panels/PanelWizard?forceLeftPanels=1&forceRightPanels=1
SimpleLog4JLogSystem:logVelocityMessage:154 - Left side ($first) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. Panels.PanelWizard [line 6, column 14]

16:22:30,747 ERROR P1-18 http://localhost:8080/xwiki/bin/view/Panels/PanelWizard?forceLeftPanels=1&forceRightPanels=1
SimpleLog4JLogSystem:logVelocityMessage:154 - Left side ($first) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. Panels.PanelWizard [line 6, column 14]

16:22:30,747 ERROR P1-18 http://localhost:8080/xwiki/bin/view/Panels/PanelWizard?forceLeftPanels=1&forceRightPanels=1
SimpleLog4JLogSystem:logVelocityMessage:154 - Left side ($first) of '==' operation has null value. If a reference, it may not be in the context. Operation not possible. Panels.PanelWizard [line 6, column 14]

I have installed xwiki-enterprise-1.1-milestone-3 on a Windows XP machine.  For now, I'm using the default HSQL database and Jetty web server.

Regards,
Justin Robbins



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