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From Harry Metske <harry.met...@gmail.com>
Subject Re: Lost versions and "Tag failed" error
Date Tue, 21 Apr 2009 16:56:15 GMT
shift-refresh is about your browser, to make sure you don't get a page from
your browser-cache, you have to force an unconditional request to the
server, which means holding the shift button and mouse-clicking the refresh
(reload) button.

Harry

2009/4/20 Weijian Fang <wf@ecs.soton.ac.uk>

> > 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?
>
> What is shift-refresh?
>
> > 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
>
> The wired thing is when my user saved the page, everything seemed
> fine; only after a couple of weeks or a couple of months, when my user
> went to check that page again, he noticed something went wrong. At
> that point, we do not know what the situation is when he saved his
> page.
>
> What is the reason for that "tag failed" error? Does it have anything
> to do with the problem?
>
> Cheers,
>
> Weijian
>
> > 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]<http://www.omii.ac.uk/wiki/PrivateWIKIADMINSystemInfo%5D>
> ]></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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