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Posted to user@jspwiki.apache.org by "Petkevicius, Vitor" <vi...@atos.net> on 2014/02/13 19:23:24 UTC
HTTP Status 500 - java.lang.NullPointerException
Hi
When I try aproval a change in JSPWiki (workflow.jsp), i get a HTTP Status 500 - java.lang.NullPointerException error
Anyone know how to fix this problem?
thanks a lot
[cid:image003.png@01CEA8B8.A2D1CB70] Vitor Natal Petkevicius Enterprise Architect
Mobile: +5511981514492
br.atos.net<http://br.atos.net/pt-br/>
RE: HTTP Status 500 - java.lang.NullPointerException
Posted by "Petkevicius, Vitor" <vi...@atos.net>.
Hi,
I am using apache-tomcat-7.0.50, no special configuration.
<Connector port="8080" protocol="HTTP/1.1" URIEncoding="UTF-8"
connectionTimeout="20000"
redirectPort="8443" />
thanks a lot
Vitor
-----Original Message-----
From: Juan Pablo Santos Rodríguez [mailto:juanpablo.santos@gmail.com]
Sent: Tuesday, February 25, 2014 5:47 AM
To: user@jspwiki.apache.org
Subject: Re: HTTP Status 500 - java.lang.NullPointerException
Hi,
we had a similar issue at work, on a clustered environment with the apache front-end not mantaining sessions, and our app not being configured to mantain the session through all the cluster's members. We workarounded it by using some weblogic propietary configuration, but maybe something similar is happening here? Vitor, could you describe your deployment environment?
br,
juan pablo
On Tue, Feb 25, 2014 at 8:15 AM, Adrien Beau <ad...@gmail.com> wrote:
> There is a very theoretical possibility that the request object is
> altered in another thread (and its session is nulled) between
> execution of lines
> 172 and 174.
>
> There is also a possibility that the JSPWiki being run has been
> modified from the original source. However the previous lines in the
> stack trace match the released source code very well.
>
> Finally, since this is a recent version of Tomcat, there is a
> possibility of a bug in Tomcat, especially if using unusual, advanced
> or recent features.
>
> Can the bug reported provide the following information?
>
> - Is the problem reproducible? Or did it happen only one?
>
> - Is it the first time you use the workflow features, or did it work
> fine previously?
>
> - Did the problem appear in production, under heavy load? Or did it
> appear in a lightly loaded test environment?
>
> - Has this JSPWiki instance been in production for a long time? Has
> Tomcat been recently upgraded?
>
> - What was the previous Tomcat version that was used to run JSPWiki?
>
> - Was the JSPWiki source code modified in any way?
>
> - Is there any special Tomcat configuration in place?
>
> Regards,
> Adrien
> Le 24 févr. 2014 19:03, "Harry Metske" <ha...@gmail.com> a écrit :
>
> > now that's a weird one, the failing line of code
> > (Preferences.java:174)
> is
> > this :
> >
> > Preferences prefs =
> (Preferences)request.getSession().getAttribute(
> > SESSIONPREFS );
> >
> > The request is sure not null because that is checked one line before
> > this one, so that means that getSession() retuns null, and that
> > should never happen according to the spec:
> >
> >
> http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletRequ
> est.html#getSession%28%29
> >
> > I googled around a bit, but only find old reports on this, for
> > example
> >
> >
> http://freddebostrom.wordpress.com/2008/03/13/tomcat-55-getsession-ret
> urns-null/
> >
> > Anyone ideas ?
> >
> > regards,
> > Harry
> >
> >
> >
> > On 24 February 2014 15:40, Petkevicius, Vitor <
> vitor.petkevicius@atos.net
> > >wrote:
> >
> > > I use the version 2.8.4, below error
> > >
> > > HTTP Status 500 - An exception occurred processing JSP page
> /Workflow.jsp
> > > at line 46
> > >
> > > type Exception report
> > >
> > > message An exception occurred processing JSP page /Workflow.jsp at
> > > line
> > 46
> > >
> > > description The server encountered an internal error that
> > > prevented it from fulfilling this request.
> > >
> > > exception
> > >
> > > org.apache.jasper.JasperException: An exception occurred
> > > processing JSP page /Workflow.jsp at line 46
> > >
> > > 43: if (d.getId() == id)
> > > 44: {
> > > 45: // Cool, we found it. Now make the decision.
> > > 46: dq.decide(d, outcome);
> > > 47: }
> > > 48: }
> > > 49: }
> > >
> > >
> > > Stacktrace:
> > >
> > >
> >
> org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServ
> letWrapper.java:568)
> > >
> > >
> >
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.
> java:470)
> > >
> > >
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:39
> 0)
> > >
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
> > >
> > > javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
> > >
> > >
> >
> com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java
> :174)
> > >
> > com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:111)
> > > root cause
> > >
> > > java.lang.NullPointerException
> > >
> > >
> >
> com.ecyrd.jspwiki.preferences.Preferences.getPreference(Preferences.ja
> va:174)
> > >
> > >
> com.ecyrd.jspwiki.preferences.Preferences.getLocale(Preferences.java:2
> 11)
> > >
> > > com.ecyrd.jspwiki.WikiContext.getBundle(WikiContext.java:970)
> > >
> > >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.handleHyperlinks(JSPWikiM
> arkupParser.java:1446)
> > >
> > >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.handleOpenbracket(JSPWiki
> MarkupParser.java:2274)
> > >
> > >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.parseToken(JSPWikiMarkupP
> arser.java:2850)
> > >
> > >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.fillBuffer(JSPWikiMarkupP
> arser.java:2649)
> > >
> > >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.parse(JSPWikiMarkupParser
> .java:2922)
> > >
> > >
> >
> com.ecyrd.jspwiki.render.RenderingManager.getRenderedDocument(Renderin
> gManager.java:234)
> > >
> > >
> >
> com.ecyrd.jspwiki.render.RenderingManager.getHTML(RenderingManager.jav
> a:315)
> > >
> > > com.ecyrd.jspwiki.WikiEngine.textToHTML(WikiEngine.java:1516)
> > >
> > >
> >
> com.ecyrd.jspwiki.PageManager$SaveWikiPageTask.execute(PageManager.jav
> a:760)
> > >
> > >
> com.ecyrd.jspwiki.workflow.Workflow.processCurrentStep(Workflow.java:7
> 66)
> > > com.ecyrd.jspwiki.workflow.Workflow.restart(Workflow.java:585)
> > >
> > > com.ecyrd.jspwiki.workflow.Decision.decide(Decision.java:134)
> > >
> > > com.ecyrd.jspwiki.workflow.DecisionQueue.decide(DecisionQueue.java:145)
> > >
> > > org.apache.jsp.Workflow_jsp._jspService(Workflow_jsp.java:128)
> > >
> > org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
> > >
> > > javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
> > >
> > >
> >
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.
> java:432)
> > >
> > >
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:39
> 0)
> > >
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
> > >
> > > javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
> > >
> > >
> >
> com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java
> :174)
> > >
> > com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:111)
> > > note The full stack trace of the root cause is available in the
> > > Apache
> > > Tomcat/7.0.50 logs.
> > >
> > >
> > > -----Original Message-----
> > > From: Florian Holeczek [mailto:florianh@apache.org]
> > > Sent: Thursday, February 13, 2014 6:58 PM
> > > To: user@jspwiki.apache.org
> > > Subject: Re: HTTP Status 500 - java.lang.NullPointerException
> > >
> > >
> > > Hi Vitor,
> > >
> > > > When I try aproval a change in JSPWiki (workflow.jsp), i get a
> > > > HTTP
> > > Status 500 - java.lang.NullPointerException error
> > >
> > > what do the logs tell?
> > >
> > > Regards
> > > Florian
> > >
> >
>
Re: HTTP Status 500 - java.lang.NullPointerException
Posted by Juan Pablo Santos Rodríguez <ju...@gmail.com>.
Hi,
we had a similar issue at work, on a clustered environment with the apache
front-end not mantaining sessions, and our app not being configured to
mantain the session through all the cluster's members. We workarounded it
by using some weblogic propietary configuration, but maybe something
similar is happening here? Vitor, could you describe your deployment
environment?
br,
juan pablo
On Tue, Feb 25, 2014 at 8:15 AM, Adrien Beau <ad...@gmail.com> wrote:
> There is a very theoretical possibility that the request object is altered
> in another thread (and its session is nulled) between execution of lines
> 172 and 174.
>
> There is also a possibility that the JSPWiki being run has been modified
> from the original source. However the previous lines in the stack trace
> match the released source code very well.
>
> Finally, since this is a recent version of Tomcat, there is a possibility
> of a bug in Tomcat, especially if using unusual, advanced or recent
> features.
>
> Can the bug reported provide the following information?
>
> - Is the problem reproducible? Or did it happen only one?
>
> - Is it the first time you use the workflow features, or did it work fine
> previously?
>
> - Did the problem appear in production, under heavy load? Or did it appear
> in a lightly loaded test environment?
>
> - Has this JSPWiki instance been in production for a long time? Has Tomcat
> been recently upgraded?
>
> - What was the previous Tomcat version that was used to run JSPWiki?
>
> - Was the JSPWiki source code modified in any way?
>
> - Is there any special Tomcat configuration in place?
>
> Regards,
> Adrien
> Le 24 févr. 2014 19:03, "Harry Metske" <ha...@gmail.com> a écrit :
>
> > now that's a weird one, the failing line of code (Preferences.java:174)
> is
> > this :
> >
> > Preferences prefs =
> (Preferences)request.getSession().getAttribute(
> > SESSIONPREFS );
> >
> > The request is sure not null because that is checked one line before this
> > one, so that means that getSession() retuns null, and that should never
> > happen according to the spec:
> >
> >
> http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletRequest.html#getSession%28%29
> >
> > I googled around a bit, but only find old reports on this, for example
> >
> >
> http://freddebostrom.wordpress.com/2008/03/13/tomcat-55-getsession-returns-null/
> >
> > Anyone ideas ?
> >
> > regards,
> > Harry
> >
> >
> >
> > On 24 February 2014 15:40, Petkevicius, Vitor <
> vitor.petkevicius@atos.net
> > >wrote:
> >
> > > I use the version 2.8.4, below error
> > >
> > > HTTP Status 500 - An exception occurred processing JSP page
> /Workflow.jsp
> > > at line 46
> > >
> > > type Exception report
> > >
> > > message An exception occurred processing JSP page /Workflow.jsp at line
> > 46
> > >
> > > description The server encountered an internal error that prevented it
> > > from fulfilling this request.
> > >
> > > exception
> > >
> > > org.apache.jasper.JasperException: An exception occurred processing JSP
> > > page /Workflow.jsp at line 46
> > >
> > > 43: if (d.getId() == id)
> > > 44: {
> > > 45: // Cool, we found it. Now make the decision.
> > > 46: dq.decide(d, outcome);
> > > 47: }
> > > 48: }
> > > 49: }
> > >
> > >
> > > Stacktrace:
> > >
> > >
> >
> org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
> > >
> > >
> >
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
> > >
> > >
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
> > >
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
> > > javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
> > >
> > >
> >
> com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java:174)
> > >
> > com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:111)
> > > root cause
> > >
> > > java.lang.NullPointerException
> > >
> > >
> >
> com.ecyrd.jspwiki.preferences.Preferences.getPreference(Preferences.java:174)
> > >
> > >
> com.ecyrd.jspwiki.preferences.Preferences.getLocale(Preferences.java:211)
> > > com.ecyrd.jspwiki.WikiContext.getBundle(WikiContext.java:970)
> > >
> > >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.handleHyperlinks(JSPWikiMarkupParser.java:1446)
> > >
> > >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.handleOpenbracket(JSPWikiMarkupParser.java:2274)
> > >
> > >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.parseToken(JSPWikiMarkupParser.java:2850)
> > >
> > >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.fillBuffer(JSPWikiMarkupParser.java:2649)
> > >
> > >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.parse(JSPWikiMarkupParser.java:2922)
> > >
> > >
> >
> com.ecyrd.jspwiki.render.RenderingManager.getRenderedDocument(RenderingManager.java:234)
> > >
> > >
> >
> com.ecyrd.jspwiki.render.RenderingManager.getHTML(RenderingManager.java:315)
> > > com.ecyrd.jspwiki.WikiEngine.textToHTML(WikiEngine.java:1516)
> > >
> > >
> >
> com.ecyrd.jspwiki.PageManager$SaveWikiPageTask.execute(PageManager.java:760)
> > >
> > >
> com.ecyrd.jspwiki.workflow.Workflow.processCurrentStep(Workflow.java:766)
> > > com.ecyrd.jspwiki.workflow.Workflow.restart(Workflow.java:585)
> > > com.ecyrd.jspwiki.workflow.Decision.decide(Decision.java:134)
> > >
> > > com.ecyrd.jspwiki.workflow.DecisionQueue.decide(DecisionQueue.java:145)
> > > org.apache.jsp.Workflow_jsp._jspService(Workflow_jsp.java:128)
> > >
> > org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
> > > javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
> > >
> > >
> >
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
> > >
> > >
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
> > >
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
> > > javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
> > >
> > >
> >
> com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java:174)
> > >
> > com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:111)
> > > note The full stack trace of the root cause is available in the Apache
> > > Tomcat/7.0.50 logs.
> > >
> > >
> > > -----Original Message-----
> > > From: Florian Holeczek [mailto:florianh@apache.org]
> > > Sent: Thursday, February 13, 2014 6:58 PM
> > > To: user@jspwiki.apache.org
> > > Subject: Re: HTTP Status 500 - java.lang.NullPointerException
> > >
> > >
> > > Hi Vitor,
> > >
> > > > When I try aproval a change in JSPWiki (workflow.jsp), i get a HTTP
> > > Status 500 - java.lang.NullPointerException error
> > >
> > > what do the logs tell?
> > >
> > > Regards
> > > Florian
> > >
> >
>
RE: HTTP Status 500 - java.lang.NullPointerException
Posted by "Petkevicius, Vitor" <vi...@atos.net>.
Hi, Adrien
- Is the problem reproducible? Or did it happen only one?
If you would like I can provide the source code.
- Is it the first time you use the workflow features, or did it work fine previously?
yes, it is the first time
- Did the problem appear in production, under heavy load? Or did it appear in a lightly loaded test environment?
The problem happens in both environments
- Has this JSPWiki instance been in production for a long time? Has Tomcat been recently upgraded?
I'm at the stage of deployment jspwiki.
- What was the previous Tomcat version that was used to run JSPWiki?
apache-tomcat-7.0.50
- Was the JSPWiki source code modified in any way?
There was no change in the source code
- Is there any special Tomcat configuration in place?
No
Thanks a lot
Vitor
-----Original Message-----
From: Adrien Beau [mailto:adrienbeau@gmail.com]
Sent: Tuesday, February 25, 2014 4:16 AM
To: user@jspwiki.apache.org
Subject: Re: HTTP Status 500 - java.lang.NullPointerException
There is a very theoretical possibility that the request object is altered in another thread (and its session is nulled) between execution of lines
172 and 174.
There is also a possibility that the JSPWiki being run has been modified from the original source. However the previous lines in the stack trace match the released source code very well.
Finally, since this is a recent version of Tomcat, there is a possibility of a bug in Tomcat, especially if using unusual, advanced or recent features.
Can the bug reported provide the following information?
- Is the problem reproducible? Or did it happen only one?
- Is it the first time you use the workflow features, or did it work fine previously?
- Did the problem appear in production, under heavy load? Or did it appear in a lightly loaded test environment?
- Has this JSPWiki instance been in production for a long time? Has Tomcat been recently upgraded?
- What was the previous Tomcat version that was used to run JSPWiki?
- Was the JSPWiki source code modified in any way?
- Is there any special Tomcat configuration in place?
Regards,
Adrien
Le 24 févr. 2014 19:03, "Harry Metske" <ha...@gmail.com> a écrit :
> now that's a weird one, the failing line of code
> (Preferences.java:174) is this :
>
> Preferences prefs =
> (Preferences)request.getSession().getAttribute(
> SESSIONPREFS );
>
> The request is sure not null because that is checked one line before
> this one, so that means that getSession() retuns null, and that should
> never happen according to the spec:
>
> http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletRequ
> est.html#getSession%28%29
>
> I googled around a bit, but only find old reports on this, for example
>
> http://freddebostrom.wordpress.com/2008/03/13/tomcat-55-getsession-ret
> urns-null/
>
> Anyone ideas ?
>
> regards,
> Harry
>
>
>
> On 24 February 2014 15:40, Petkevicius, Vitor
> <vitor.petkevicius@atos.net
> >wrote:
>
> > I use the version 2.8.4, below error
> >
> > HTTP Status 500 - An exception occurred processing JSP page
> > /Workflow.jsp at line 46
> >
> > type Exception report
> >
> > message An exception occurred processing JSP page /Workflow.jsp at
> > line
> 46
> >
> > description The server encountered an internal error that prevented
> > it from fulfilling this request.
> >
> > exception
> >
> > org.apache.jasper.JasperException: An exception occurred processing
> > JSP page /Workflow.jsp at line 46
> >
> > 43: if (d.getId() == id)
> > 44: {
> > 45: // Cool, we found it. Now make the decision.
> > 46: dq.decide(d, outcome);
> > 47: }
> > 48: }
> > 49: }
> >
> >
> > Stacktrace:
> >
> >
> org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServ
> letWrapper.java:568)
> >
> >
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.
> java:470)
> >
> > org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
> > org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
> > javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
> >
> >
> com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java
> :174)
> >
> com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:111)
> > root cause
> >
> > java.lang.NullPointerException
> >
> >
> com.ecyrd.jspwiki.preferences.Preferences.getPreference(Preferences.ja
> va:174)
> >
> > com.ecyrd.jspwiki.preferences.Preferences.getLocale(Preferences.java:211)
> >
> > com.ecyrd.jspwiki.WikiContext.getBundle(WikiContext.java:970)
> >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.handleHyperlinks(JSPWikiM
> arkupParser.java:1446)
> >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.handleOpenbracket(JSPWiki
> MarkupParser.java:2274)
> >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.parseToken(JSPWikiMarkupP
> arser.java:2850)
> >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.fillBuffer(JSPWikiMarkupP
> arser.java:2649)
> >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.parse(JSPWikiMarkupParser
> .java:2922)
> >
> >
> com.ecyrd.jspwiki.render.RenderingManager.getRenderedDocument(Renderin
> gManager.java:234)
> >
> >
> com.ecyrd.jspwiki.render.RenderingManager.getHTML(RenderingManager.jav
> a:315)
> >
> > com.ecyrd.jspwiki.WikiEngine.textToHTML(WikiEngine.java:1516)
> >
> >
> com.ecyrd.jspwiki.PageManager$SaveWikiPageTask.execute(PageManager.jav
> a:760)
> >
> > com.ecyrd.jspwiki.workflow.Workflow.processCurrentStep(Workflow.java:766)
> > com.ecyrd.jspwiki.workflow.Workflow.restart(Workflow.java:585)
> >
> > com.ecyrd.jspwiki.workflow.Decision.decide(Decision.java:134)
> >
> > com.ecyrd.jspwiki.workflow.DecisionQueue.decide(DecisionQueue.java:145)
> >
> > org.apache.jsp.Workflow_jsp._jspService(Workflow_jsp.java:128)
> >
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
> > javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
> >
> >
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.
> java:432)
> >
> > org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
> > org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
> > javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
> >
> >
> com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java
> :174)
> >
> com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:111)
> > note The full stack trace of the root cause is available in the
> > Apache
> > Tomcat/7.0.50 logs.
> >
> >
> > -----Original Message-----
> > From: Florian Holeczek [mailto:florianh@apache.org]
> > Sent: Thursday, February 13, 2014 6:58 PM
> > To: user@jspwiki.apache.org
> > Subject: Re: HTTP Status 500 - java.lang.NullPointerException
> >
> >
> > Hi Vitor,
> >
> > > When I try aproval a change in JSPWiki (workflow.jsp), i get a
> > > HTTP
> > Status 500 - java.lang.NullPointerException error
> >
> > what do the logs tell?
> >
> > Regards
> > Florian
> >
>
Re: HTTP Status 500 - java.lang.NullPointerException
Posted by Adrien Beau <ad...@gmail.com>.
There is a very theoretical possibility that the request object is altered
in another thread (and its session is nulled) between execution of lines
172 and 174.
There is also a possibility that the JSPWiki being run has been modified
from the original source. However the previous lines in the stack trace
match the released source code very well.
Finally, since this is a recent version of Tomcat, there is a possibility
of a bug in Tomcat, especially if using unusual, advanced or recent
features.
Can the bug reported provide the following information?
- Is the problem reproducible? Or did it happen only one?
- Is it the first time you use the workflow features, or did it work fine
previously?
- Did the problem appear in production, under heavy load? Or did it appear
in a lightly loaded test environment?
- Has this JSPWiki instance been in production for a long time? Has Tomcat
been recently upgraded?
- What was the previous Tomcat version that was used to run JSPWiki?
- Was the JSPWiki source code modified in any way?
- Is there any special Tomcat configuration in place?
Regards,
Adrien
Le 24 févr. 2014 19:03, "Harry Metske" <ha...@gmail.com> a écrit :
> now that's a weird one, the failing line of code (Preferences.java:174) is
> this :
>
> Preferences prefs = (Preferences)request.getSession().getAttribute(
> SESSIONPREFS );
>
> The request is sure not null because that is checked one line before this
> one, so that means that getSession() retuns null, and that should never
> happen according to the spec:
>
> http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletRequest.html#getSession%28%29
>
> I googled around a bit, but only find old reports on this, for example
>
> http://freddebostrom.wordpress.com/2008/03/13/tomcat-55-getsession-returns-null/
>
> Anyone ideas ?
>
> regards,
> Harry
>
>
>
> On 24 February 2014 15:40, Petkevicius, Vitor <vitor.petkevicius@atos.net
> >wrote:
>
> > I use the version 2.8.4, below error
> >
> > HTTP Status 500 - An exception occurred processing JSP page /Workflow.jsp
> > at line 46
> >
> > type Exception report
> >
> > message An exception occurred processing JSP page /Workflow.jsp at line
> 46
> >
> > description The server encountered an internal error that prevented it
> > from fulfilling this request.
> >
> > exception
> >
> > org.apache.jasper.JasperException: An exception occurred processing JSP
> > page /Workflow.jsp at line 46
> >
> > 43: if (d.getId() == id)
> > 44: {
> > 45: // Cool, we found it. Now make the decision.
> > 46: dq.decide(d, outcome);
> > 47: }
> > 48: }
> > 49: }
> >
> >
> > Stacktrace:
> >
> >
> org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
> >
> >
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
> >
> > org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
> > org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
> > javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
> >
> >
> com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java:174)
> >
> com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:111)
> > root cause
> >
> > java.lang.NullPointerException
> >
> >
> com.ecyrd.jspwiki.preferences.Preferences.getPreference(Preferences.java:174)
> >
> > com.ecyrd.jspwiki.preferences.Preferences.getLocale(Preferences.java:211)
> > com.ecyrd.jspwiki.WikiContext.getBundle(WikiContext.java:970)
> >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.handleHyperlinks(JSPWikiMarkupParser.java:1446)
> >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.handleOpenbracket(JSPWikiMarkupParser.java:2274)
> >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.parseToken(JSPWikiMarkupParser.java:2850)
> >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.fillBuffer(JSPWikiMarkupParser.java:2649)
> >
> >
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.parse(JSPWikiMarkupParser.java:2922)
> >
> >
> com.ecyrd.jspwiki.render.RenderingManager.getRenderedDocument(RenderingManager.java:234)
> >
> >
> com.ecyrd.jspwiki.render.RenderingManager.getHTML(RenderingManager.java:315)
> > com.ecyrd.jspwiki.WikiEngine.textToHTML(WikiEngine.java:1516)
> >
> >
> com.ecyrd.jspwiki.PageManager$SaveWikiPageTask.execute(PageManager.java:760)
> >
> > com.ecyrd.jspwiki.workflow.Workflow.processCurrentStep(Workflow.java:766)
> > com.ecyrd.jspwiki.workflow.Workflow.restart(Workflow.java:585)
> > com.ecyrd.jspwiki.workflow.Decision.decide(Decision.java:134)
> >
> > com.ecyrd.jspwiki.workflow.DecisionQueue.decide(DecisionQueue.java:145)
> > org.apache.jsp.Workflow_jsp._jspService(Workflow_jsp.java:128)
> >
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
> > javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
> >
> >
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
> >
> > org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
> > org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
> > javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
> >
> >
> com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java:174)
> >
> com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:111)
> > note The full stack trace of the root cause is available in the Apache
> > Tomcat/7.0.50 logs.
> >
> >
> > -----Original Message-----
> > From: Florian Holeczek [mailto:florianh@apache.org]
> > Sent: Thursday, February 13, 2014 6:58 PM
> > To: user@jspwiki.apache.org
> > Subject: Re: HTTP Status 500 - java.lang.NullPointerException
> >
> >
> > Hi Vitor,
> >
> > > When I try aproval a change in JSPWiki (workflow.jsp), i get a HTTP
> > Status 500 - java.lang.NullPointerException error
> >
> > what do the logs tell?
> >
> > Regards
> > Florian
> >
>
Re: HTTP Status 500 - java.lang.NullPointerException
Posted by Harry Metske <ha...@gmail.com>.
now that's a weird one, the failing line of code (Preferences.java:174) is
this :
Preferences prefs = (Preferences)request.getSession().getAttribute(
SESSIONPREFS );
The request is sure not null because that is checked one line before this
one, so that means that getSession() retuns null, and that should never
happen according to the spec:
http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletRequest.html#getSession%28%29
I googled around a bit, but only find old reports on this, for example
http://freddebostrom.wordpress.com/2008/03/13/tomcat-55-getsession-returns-null/
Anyone ideas ?
regards,
Harry
On 24 February 2014 15:40, Petkevicius, Vitor <vi...@atos.net>wrote:
> I use the version 2.8.4, below error
>
> HTTP Status 500 - An exception occurred processing JSP page /Workflow.jsp
> at line 46
>
> type Exception report
>
> message An exception occurred processing JSP page /Workflow.jsp at line 46
>
> description The server encountered an internal error that prevented it
> from fulfilling this request.
>
> exception
>
> org.apache.jasper.JasperException: An exception occurred processing JSP
> page /Workflow.jsp at line 46
>
> 43: if (d.getId() == id)
> 44: {
> 45: // Cool, we found it. Now make the decision.
> 46: dq.decide(d, outcome);
> 47: }
> 48: }
> 49: }
>
>
> Stacktrace:
>
> org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
>
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
>
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
>
> com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java:174)
> com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:111)
> root cause
>
> java.lang.NullPointerException
>
> com.ecyrd.jspwiki.preferences.Preferences.getPreference(Preferences.java:174)
>
> com.ecyrd.jspwiki.preferences.Preferences.getLocale(Preferences.java:211)
> com.ecyrd.jspwiki.WikiContext.getBundle(WikiContext.java:970)
>
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.handleHyperlinks(JSPWikiMarkupParser.java:1446)
>
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.handleOpenbracket(JSPWikiMarkupParser.java:2274)
>
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.parseToken(JSPWikiMarkupParser.java:2850)
>
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.fillBuffer(JSPWikiMarkupParser.java:2649)
>
> com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.parse(JSPWikiMarkupParser.java:2922)
>
> com.ecyrd.jspwiki.render.RenderingManager.getRenderedDocument(RenderingManager.java:234)
>
> com.ecyrd.jspwiki.render.RenderingManager.getHTML(RenderingManager.java:315)
> com.ecyrd.jspwiki.WikiEngine.textToHTML(WikiEngine.java:1516)
>
> com.ecyrd.jspwiki.PageManager$SaveWikiPageTask.execute(PageManager.java:760)
>
> com.ecyrd.jspwiki.workflow.Workflow.processCurrentStep(Workflow.java:766)
> com.ecyrd.jspwiki.workflow.Workflow.restart(Workflow.java:585)
> com.ecyrd.jspwiki.workflow.Decision.decide(Decision.java:134)
>
> com.ecyrd.jspwiki.workflow.DecisionQueue.decide(DecisionQueue.java:145)
> org.apache.jsp.Workflow_jsp._jspService(Workflow_jsp.java:128)
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
>
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
>
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
>
> com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java:174)
> com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:111)
> note The full stack trace of the root cause is available in the Apache
> Tomcat/7.0.50 logs.
>
>
> -----Original Message-----
> From: Florian Holeczek [mailto:florianh@apache.org]
> Sent: Thursday, February 13, 2014 6:58 PM
> To: user@jspwiki.apache.org
> Subject: Re: HTTP Status 500 - java.lang.NullPointerException
>
>
> Hi Vitor,
>
> > When I try aproval a change in JSPWiki (workflow.jsp), i get a HTTP
> Status 500 - java.lang.NullPointerException error
>
> what do the logs tell?
>
> Regards
> Florian
>
RE: HTTP Status 500 - java.lang.NullPointerException
Posted by "Petkevicius, Vitor" <vi...@atos.net>.
I use the version 2.8.4, below error
HTTP Status 500 - An exception occurred processing JSP page /Workflow.jsp at line 46
type Exception report
message An exception occurred processing JSP page /Workflow.jsp at line 46
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: An exception occurred processing JSP page /Workflow.jsp at line 46
43: if (d.getId() == id)
44: {
45: // Cool, we found it. Now make the decision.
46: dq.decide(d, outcome);
47: }
48: }
49: }
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java:174)
com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:111)
root cause
java.lang.NullPointerException
com.ecyrd.jspwiki.preferences.Preferences.getPreference(Preferences.java:174)
com.ecyrd.jspwiki.preferences.Preferences.getLocale(Preferences.java:211)
com.ecyrd.jspwiki.WikiContext.getBundle(WikiContext.java:970)
com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.handleHyperlinks(JSPWikiMarkupParser.java:1446)
com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.handleOpenbracket(JSPWikiMarkupParser.java:2274)
com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.parseToken(JSPWikiMarkupParser.java:2850)
com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.fillBuffer(JSPWikiMarkupParser.java:2649)
com.ecyrd.jspwiki.parser.JSPWikiMarkupParser.parse(JSPWikiMarkupParser.java:2922)
com.ecyrd.jspwiki.render.RenderingManager.getRenderedDocument(RenderingManager.java:234)
com.ecyrd.jspwiki.render.RenderingManager.getHTML(RenderingManager.java:315)
com.ecyrd.jspwiki.WikiEngine.textToHTML(WikiEngine.java:1516)
com.ecyrd.jspwiki.PageManager$SaveWikiPageTask.execute(PageManager.java:760)
com.ecyrd.jspwiki.workflow.Workflow.processCurrentStep(Workflow.java:766)
com.ecyrd.jspwiki.workflow.Workflow.restart(Workflow.java:585)
com.ecyrd.jspwiki.workflow.Decision.decide(Decision.java:134)
com.ecyrd.jspwiki.workflow.DecisionQueue.decide(DecisionQueue.java:145)
org.apache.jsp.Workflow_jsp._jspService(Workflow_jsp.java:128)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java:174)
com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:111)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.50 logs.
-----Original Message-----
From: Florian Holeczek [mailto:florianh@apache.org]
Sent: Thursday, February 13, 2014 6:58 PM
To: user@jspwiki.apache.org
Subject: Re: HTTP Status 500 - java.lang.NullPointerException
Hi Vitor,
> When I try aproval a change in JSPWiki (workflow.jsp), i get a HTTP Status 500 - java.lang.NullPointerException error
what do the logs tell?
Regards
Florian
Re: HTTP Status 500 - java.lang.NullPointerException
Posted by Florian Holeczek <fl...@apache.org>.
Hi Vitor,
> When I try aproval a change in JSPWiki (workflow.jsp), i get a HTTP Status 500 - java.lang.NullPointerException error
what do the logs tell?
Regards
Florian