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Subject: Re: Session on Tomcat 7 manager screem
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From: Christopher Schultz <chris@christopherschultz.net>
Message-id: <56C61AF5.1080609@christopherschultz.net>
Date: Thu, 18 Feb 2016 14:26:45 -0500
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Qadeer,

On 2/18/16 12:03 PM, Qadeer Khan wrote:
> Ok I got a little more information the user

Get this, too: What exact version of Tomcat. 7.0.what?

> On clicking on the session number '0', he is getting the following
> error. Any idea?
> 
> FAIL - Encountered exception org.apache.jasper.JasperException:
> Unable to compile class for JSP:
> 
> An error occurred at line: [18] in the generated java file:
> [/opt/jboss/jws-3.0/tomcat7/work/Catalina/localhost/manager/org/apache
/jsp/WEB_002dINF/jsp/sessionsList_jsp.java]

Okay,
> 
so this is JBoss. Has Tomcat itself been modified at all? Or is
it a (mostly) stock Tomcat?

> Only a type can be imported. 
> org.apache.catalina.ha.session.DeltaSession resolves to a package
> 
> An error occurred at line: 109 in the jsp file:
> /WEB-INF/jsp/sessionsList.jsp DeltaSession cannot be resolved to a
> type 106:        Session currentSession = (Session) iter.next(); 
> 107:        String currentSessionId =
> JspHelper.escapeXml(currentSession.getId()); 108:        String
> type; 109:        if (currentSession instanceof DeltaSession) { 
> 110:            if (((DeltaSession)
> currentSession).isPrimarySession()) { 111:                type =
> "Primary"; 112:            } else {
> 
> 
> An error occurred at line: 110 in the jsp file:
> /WEB-INF/jsp/sessionsList.jsp DeltaSession cannot be resolved to a
> type 107:        String currentSessionId =
> JspHelper.escapeXml(currentSession.getId()); 108:        String
> type; 109:        if (currentSession instanceof DeltaSession) { 
> 110:            if (((DeltaSession)
> currentSession).isPrimarySession()) { 111:                type =
> "Primary"; 112:            } else { 113:                type =
> "Backup";

This suggests to me that something is broken in the Tomcat
installation itself (meaning that the customer - or you - have broken
something). Can you confirm that the manager web application matches
the Tomcat version you are running? If you copied the manager from
another Tomcat version, it might not work very well -- or at all.

Back to your original question:

> So there are sessions running by users but no increment shown
> under 'session'
> 
> Please throw some light as why it is not increment and what can be 
> done to fix it?

Why are you so sure that there are user sessions? Is some other
component telling you there *are* sessions? If so, which component is
telling you that there are sessions in memory?

- -chris
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