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From Janne Jalkanen <janne.jalka...@ecyrd.com>
Subject Re: Lost versions and "Tag failed" error
Date Wed, 22 Apr 2009 19:26:15 GMT

Hm.  It could also be a misconfigured proxy server somewhere, or a  
config issue on your servers.  I recommend that the next time this  
happens, try to get a screen shot or a listing of the page history at  
that moment, and see whether the data is really there.

/Janne

On 21 Apr 2009, at 22:33, Weijian Fang wrote:

> I don't think it is a client-side caching issue, because my user saw
> his edits went live.
>
> Cheers,
>
> Weijian
>
>
>
> 2009/4/20 Janne Jalkanen <janne.jalkanen@iki.fi>:
>> Writes are not cached, so they go directly to the persistence store.
>>
>> Does it help if your users shift-refreshes once he's saved things?
>> Does the content end up in the repository, ie. is the page history
>> still correct? This could be a browser caching issue as well, if
>> they've got very aggressive caching set up.
>>
>> /Janne
>>
>> On Mon, Apr 20, 2009 at 04:22:36PM +0100, Weijian Fang wrote:
>>> I see JSPWiki uses some caching mechanism. How is the consistency
>>> between the in-memory cache and the persisted wiki page versions? If
>>> just after the save button in a wiki page edit tab is successfully
>>> returned, tomcat/jspwiki is restarted, will the new edits be safely
>>> recorded in the file system? I am using jspwiki 2.6.2 with
>>> VersioningFileProvider.
>>>
>>> Cheers,
>>>
>>> Weijian
>>>
>>>
>>>
>>> 2009/4/20 Weijian Fang <wf@ecs.soton.ac.uk>:
>>>> Hi,
>>>>
>>>> One of my JSPWiki users reported that one of his saved wiki pages  
>>>> (it
>>>> means he did see the "save" button returns successfully) has  
>>>> reverted
>>>> to its previous version. Because he complained this for quite a few
>>>> times (for different pages), and this time he even got a witness,  
>>>> so I
>>>> really believe him. Has anyone experienced this kind of lost  
>>>> versions
>>>> as well?
>>>>
>>>> Quite a lot "Tag failed" errors have been recorded by my log4j.
>>>> Usually they burst out in a very short period. Please see the log4j
>>>> record below. Will it have anything to do with the lost version
>>>> problem? Many thanks in advance!
>>>>
>>>> <log4j:event logger="com.ecyrd.jspwiki.tags.WikiTagBase"
>>>> timestamp="1239931142106" level="ERROR" thread="TP-Processor14">
>>>> <log4j:message><![CDATA[Tag failed]]></log4j:message>
>>>> <log4j:NDC><![CDATA[OMII-UK:/wiki/PrivateWIKIADMINSystemInfo
>>>> OMII-UK:http://www.omii.ac.uk/wiki/PrivateWIKIADMINSystemInfo]]></

>>>> log4j:NDC>
>>>> <log4j:throwable><![CDATA[javax.servlet.jsp.JspException:  
>>>> WikiContext
>>>> may not be NULL - serious internal problem!
>>>>        at  
>>>> com.ecyrd.jspwiki.tags.WikiTagBase.doStartTag(WikiTagBase.java:86)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .jsp.Error_jsp._jspx_meth_wiki_005fMessages_005f0(Error_jsp.java: 
>>>> 178)
>>>>        at org.apache.jsp.Error_jsp._jspService(Error_jsp.java:125)
>>>>        at  
>>>> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
>>>>        at javax.servlet.http.HttpServlet.service(HttpServlet.java: 
>>>> 803)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .jasper.servlet.JspServletWrapper.service(JspServletWrapper.java: 
>>>> 331)
>>>>        at  
>>>> org 
>>>> .apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java: 
>>>> 329)
>>>>        at  
>>>> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
>>>>        at javax.servlet.http.HttpServlet.service(HttpServlet.java: 
>>>> 803)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core 
>>>> .ApplicationFilterChain 
>>>> .internalDoFilter(ApplicationFilterChain.java:269)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java: 
>>>> 188)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core 
>>>> .ApplicationDispatcher.processRequest(ApplicationDispatcher.java: 
>>>> 461)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core.ApplicationDispatcher.doForward(ApplicationDispatcher.java: 
>>>> 399)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:686)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .jasper.runtime.PageContextImpl.forward(PageContextImpl.java:656)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .jasper 
>>>> .runtime 
>>>> .PageContextImpl.doHandlePageException(PageContextImpl.java:801)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .jasper 
>>>> .runtime.PageContextImpl.handlePageException(PageContextImpl.java: 
>>>> 774)
>>>>        at org.apache.jsp.Wiki_jsp._jspService(Wiki_jsp.java:135)
>>>>        at  
>>>> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
>>>>        at javax.servlet.http.HttpServlet.service(HttpServlet.java: 
>>>> 803)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .jasper.servlet.JspServletWrapper.service(JspServletWrapper.java: 
>>>> 331)
>>>>        at  
>>>> org 
>>>> .apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java: 
>>>> 329)
>>>>        at  
>>>> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
>>>>        at javax.servlet.http.HttpServlet.service(HttpServlet.java: 
>>>> 803)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core 
>>>> .ApplicationFilterChain 
>>>> .internalDoFilter(ApplicationFilterChain.java:269)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java: 
>>>> 188)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:679)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core 
>>>> .ApplicationDispatcher.processRequest(ApplicationDispatcher.java: 
>>>> 461)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core.ApplicationDispatcher.doForward(ApplicationDispatcher.java: 
>>>> 399)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
>>>>        at com.ecyrd.jspwiki.WikiServlet.doGet(WikiServlet.java:100)
>>>>        at javax.servlet.http.HttpServlet.service(HttpServlet.java: 
>>>> 690)
>>>>        at javax.servlet.http.HttpServlet.service(HttpServlet.java: 
>>>> 803)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core 
>>>> .ApplicationFilterChain 
>>>> .internalDoFilter(ApplicationFilterChain.java:269)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java: 
>>>> 188)
>>>>        at  
>>>> com 
>>>> .ecyrd 
>>>> .jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java:99)
>>>>        at  
>>>> com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:91)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core 
>>>> .ApplicationFilterChain 
>>>> .internalDoFilter(ApplicationFilterChain.java:215)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java: 
>>>> 188)
>>>>        at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter 
>>>> (UrlRewriteFilter.java:738)
>>>>        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:213)
>>>>        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.valves.AccessLogValve.invoke(AccessLogValve.java: 
>>>> 548)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina 
>>>> .core.StandardEngineValve.invoke(StandardEngineValve.java:108)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
>>>>        at  
>>>> org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java: 
>>>> 200)
>>>>        at  
>>>> org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283)
>>>>        at  
>>>> org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:773)
>>>>        at  
>>>> org 
>>>> .apache 
>>>> .jk.common.ChannelSocket.processConnection(ChannelSocket.java:703)
>>>>        at org.apache.jk.common.ChannelSocket 
>>>> $SocketConnection.runIt(ChannelSocket.java:895)
>>>>        at org.apache.tomcat.util.threads.ThreadPool 
>>>> $ControlRunnable.run(ThreadPool.java:689)
>>>>        at java.lang.Thread.run(Thread.java:595)
>>>> ]]></log4j:throwable>
>>>> </log4j:event>
>>>>
>>>> Cheers,
>>>>
>>>> Weijian
>>>>
>>


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