Re: [PATCH] improved HTMLManagerServlet

[Malcolm Edgar]

Glenn Nielsen wrote:

>I installed this and took a look at it.  Looking much better. :-)
>
>Here are some more suggestions for improvement.
>
>1.  Change the title to "Tomcat Web Application Manager".

done

>2.  Move the Message: table to just below the page title.

done

>3.  Only enable the Start/Stop/Reload links based on the status of
> the web application.  i.e. A web application that is currently
> stopped can only be started or removed.

done

>4.  Include the hostname and port somewhere, perhaps below the title.

The hostname and port is in the browser's address field, do you want it 
anyway?

>5.  Add Help/Documentation for the different options.

What do you have in mind, listing help in the Message: table?

>6.  There are some features of the manager which are not available
> /manager/resources /manager/roles /manager/sessions.

sessions is already available in link, I will attempt resources and roles 
later.

>Regards,
>
>Glenn

Work has been busy, so I have been a little slow getting these mods done.

Regards Malcolm



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/*
* $Header: 
/home/cvspublic/jakarta-tomcat-4.0/catalina/src/share/org/apache/catalina/servlets/HTMLManagerServlet.java,v
 
1.7 2002/06/10 19:19:23 glenn Exp $
* $Revision: 1.7 $
* $Date: 2002/06/10 19:19:23 $
*
* 
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation.  All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
*notice, this list of conditions and the following disclaimer in
*the documentation and/or other materials provided with the
*distribution.
*
* 3. The end-user documentation included with the redistribution, if
*any, must include the following acknowlegement:
*   "This product includes software developed by the
*Apache Software Foundation (http://www.apache.org/)."
*Alternately, this acknowlegement may appear in the software itself,
*if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
*Foundation" must not be used to endorse or promote products derived
*from this software without prior written permission. For written
*permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache"
*nor may "Apache" appear in their names without prior written
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* individuals on behalf of the Apache Software Foundation.  For more
* information on the Apache Software Foundation, please see
* .
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* [Additional notices, if required by prior licensing conditions]
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*/


package org.apache.catalina.servlets;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.text.MessageFormat;
import java.util.Date;
import java.util.Iterator;
import java.util.Map;
import java.util.TreeMap;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.catalina.Context;
import org.apache.catalina.util.ServerInfo;

/**
* Servlet that enables remote management of the web applications installed
* within the same virtual host as this web application is.  Normally, this
* functionality will be protected by a security constraint in the web
* application deployment descriptor.  However, this requirement can be
* relaxed during testing.
* 
* The difference between this ManagerServlet and this
* Servlet is that this Servlet prints out a HTML interface which
* makes it e

Re: [PATCH] improved HTMLManagerServlet

[Glenn Nielsen]

I installed this and took a look at it.  Looking much better. :-)

Here are some more suggestions for improvement.

1.  Change the title to "Tomcat Web Application Manager".

2.  Move the Message: table to just below the page title.

3.  Only enable the Start/Stop/Reload links based on the status of
 the web application.  i.e. A web application that is currently
 stopped can only be started or removed.

4.  Include the hostname and port somewhere, perhaps below the title.

5.  Add Help/Documentation for the different options.

6.  There are some features of the manager which are not available
 /manager/resources /manager/roles /manager/sessions.

Regards,

Glenn

Malcolm Edgar wrote:

> Glenn Nielsen wrote:
> 
>> I have a number of comments.  First thanks for working on improving the
>> HTMLManagerServlet.
>>
>> 1.  GC should not be user initiated, it should be left to the JVM.
>> In addition, when virtual hosting web sites, those who have 
>> permission
>> to manage applications for a particluar host may not be the
>> system admin for Tomcat.  I wouldn't want them to be able to 
>> trigger a GC.
>> The GC option needs to be removed.
> 
> 
> Done
> 
>> 2.  The js which you added for onClick really isn't necessary.  The
>> HTMLManagerServlet should be usable w/o JavaScript enabled
>> in the browser. It should be removed.
> 
> 
> Done
> 
>> 3.  The listing of memory usage isn't really needed if GC is removed.
>> It doesn't provide info that is of benefit to someone
>> who just manages web applications and is not the Tomcat sysad.
>> A Tomcat sysad would be better off using the -verbose:gc arg to
>> java when starting Tomcat so that they collect GC data which they
>> can later graph to profile the Tomcat JVM memory usage.
> 
> 
> Done
> 
> The memory status stuff is probably out of place here. A performance 
> monitoring module could be included in the Admin application, covering 
> mem status, request response time, etc.
> 
> Regards Malcolm Edgar
> 
> 
> 
> _
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> defaultservlet.directorylistingfor=Directory Listing for:
> defaultservlet.upto=Up to:
> defaultservlet.subdirectories=Subdirectories:
> defaultservlet.files=Files:
> htmlManagerServlet.appsAvailable=Running
> htmlManagerServlet.appsName=Display Name
> htmlManagerServlet.appsPath=Path
> htmlManagerServlet.appsReload=Reload
> htmlManagerServlet.appsRemove=Remove
> htmlManagerServlet.appsSessions=Sessions
> htmlManagerServlet.appsStart=Start
> htmlManagerServlet.appsStop=Stop
> htmlManagerServlet.appsTitle=Applications
> htmlManagerServlet.installButton=Install
> htmlManagerServlet.installConfig=Config URL:
> htmlManagerServlet.installPath=Path:
> htmlManagerServlet.installTitle=Install
> htmlManagerServlet.installWar=WAR URL:
> htmlManagerServlet.messageLabel=Message:
> htmlManagerServlet.serverJVMVendor=JVM Vendor
> htmlManagerServlet.serverJVMVersion=JVM Version
> htmlManagerServlet.serverOSArch=OS Arch
> htmlManagerServlet.serverOSName=OS Name
> htmlManagerServlet.serverOSVersion=OS Version
> htmlManagerServlet.serverTitle=Server
> htmlManagerServlet.serverVersion=Server Version
> htmlManagerServlet.title=Tomcat Manager
> invokerServlet.allocate=Cannot allocate servlet instance for path {0}
> invokerServlet.cannotCreate=Cannot create servlet wrapper for path {0}
> invokerServlet.deallocate=Cannot deallocate servlet instance for path {0}
> invokerServlet.invalidPath=No servlet name or class was specified in 
> path {0}
> invokerServlet.notNamed=Cannot call invoker servlet with a named dispatcher
> invokerServlet.noWrapper=Container has not called setWrapper() for this 
> servlet
> managerServlet.alreadyContext=FAIL - Application already exists at path {0}
> managerServlet.alreadyDocBase=FAIL - Directory {0} is already in use
> managerServlet.cannotInvoke=Cannot invoke manager servlet through invoker
> managerServlet.configured=OK - Installed application from context file {0}
> managerServlet.deployed=OK - Deployed application at context path {0}
> managerServlet.exception=FAIL - Encountered exception {0}
> managerServlet.installed=OK - Installed application at context path {0}
> managerServlet.invalidPath=FAIL - Invalid context path {0} was specified
> managerServlet.invalidWar=FAIL - Invalid application URL {0} was specified
> managerServlet.listed=OK - Listed applications for virtual host {0}
> managerServlet.listitem={0}:{1}:{2}:{3}
> managerServlet.noAppBase=FAIL - Cannot identify application base for 
> context path {0}
> managerServlet.noCommand=FAIL - No command was specified
> managerServlet.noContext=FAIL - No context exists for path {0}
> managerServlet.noDirectory=FAIL - Non-directory document base for path {0}
> managerServlet.noDocBase=FAIL - Cannot remove document base for path {0}
> managerServlet.noGlobal=FAIL - No global JNDI resources a

Re: [PATCH] improved HTMLManagerServlet

[Malcolm Edgar]

Glenn Nielsen wrote:

>I have a number of comments.  First thanks for working on improving the
>HTMLManagerServlet.
>
>1.  GC should not be user initiated, it should be left to the JVM.
> In addition, when virtual hosting web sites, those who have permission
> to manage applications for a particluar host may not be the
> system admin for Tomcat.  I wouldn't want them to be able to trigger a 
>GC.
> The GC option needs to be removed.

Done

>2.  The js which you added for onClick really isn't necessary.  The
> HTMLManagerServlet should be usable w/o JavaScript enabled
> in the browser. It should be removed.

Done

>3.  The listing of memory usage isn't really needed if GC is removed.
> It doesn't provide info that is of benefit to someone
> who just manages web applications and is not the Tomcat sysad.
> A Tomcat sysad would be better off using the -verbose:gc arg to
> java when starting Tomcat so that they collect GC data which they
> can later graph to profile the Tomcat JVM memory usage.

Done

The memory status stuff is probably out of place here. A performance 
monitoring module could be included in the Admin application, covering mem 
status, request response time, etc.

Regards Malcolm Edgar



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defaultservlet.directorylistingfor=Directory Listing for:
defaultservlet.upto=Up to:
defaultservlet.subdirectories=Subdirectories:
defaultservlet.files=Files:
htmlManagerServlet.appsAvailable=Running
htmlManagerServlet.appsName=Display Name
htmlManagerServlet.appsPath=Path
htmlManagerServlet.appsReload=Reload
htmlManagerServlet.appsRemove=Remove
htmlManagerServlet.appsSessions=Sessions
htmlManagerServlet.appsStart=Start
htmlManagerServlet.appsStop=Stop
htmlManagerServlet.appsTitle=Applications
htmlManagerServlet.installButton=Install
htmlManagerServlet.installConfig=Config URL:
htmlManagerServlet.installPath=Path:
htmlManagerServlet.installTitle=Install
htmlManagerServlet.installWar=WAR URL:
htmlManagerServlet.messageLabel=Message:
htmlManagerServlet.serverJVMVendor=JVM Vendor
htmlManagerServlet.serverJVMVersion=JVM Version
htmlManagerServlet.serverOSArch=OS Arch
htmlManagerServlet.serverOSName=OS Name
htmlManagerServlet.serverOSVersion=OS Version
htmlManagerServlet.serverTitle=Server
htmlManagerServlet.serverVersion=Server Version
htmlManagerServlet.title=Tomcat Manager
invokerServlet.allocate=Cannot allocate servlet instance for path {0}
invokerServlet.cannotCreate=Cannot create servlet wrapper for path {0}
invokerServlet.deallocate=Cannot deallocate servlet instance for path {0}
invokerServlet.invalidPath=No servlet name or class was specified in path 
{0}
invokerServlet.notNamed=Cannot call invoker servlet with a named dispatcher
invokerServlet.noWrapper=Container has not called setWrapper() for this 
servlet
managerServlet.alreadyContext=FAIL - Application already exists at path {0}
managerServlet.alreadyDocBase=FAIL - Directory {0} is already in use
managerServlet.cannotInvoke=Cannot invoke manager servlet through invoker
managerServlet.configured=OK - Installed application from context file {0}
managerServlet.deployed=OK - Deployed application at context path {0}
managerServlet.exception=FAIL - Encountered exception {0}
managerServlet.installed=OK - Installed application at context path {0}
managerServlet.invalidPath=FAIL - Invalid context path {0} was specified
managerServlet.invalidWar=FAIL - Invalid application URL {0} was specified
managerServlet.listed=OK - Listed applications for virtual host {0}
managerServlet.listitem={0}:{1}:{2}:{3}
managerServlet.noAppBase=FAIL - Cannot identify application base for context 
path {0}
managerServlet.noCommand=FAIL - No command was specified
managerServlet.noContext=FAIL - No context exists for path {0}
managerServlet.noDirectory=FAIL - Non-directory document base for path {0}
managerServlet.noDocBase=FAIL - Cannot remove document base for path {0}
managerServlet.noGlobal=FAIL - No global JNDI resources are available
managerServlet.noPath=FAIL - No context path was specified
managerServlet.noReload=FAIL - Reload not supported on WAR deployed at path 
{0}
managerServlet.noRename=FAIL - Cannot deploy uploaded WAR for path {0}
managerServlet.noRole=FAIL - User does not possess role {0}
managerServlet.noWrapper=Container has not called setWrapper() for this 
servlet
managerServlet.reloaded=OK - Reloaded application at context path {0}
managerServlet.removed=OK - Removed application at context path {0}
managerServlet.resourcesAll=OK - Listed global resources of all types
managerServlet.resourcesType=OK - Listed global resources of type {0}
managerServlet.rolesList=OK - Listed security roles
managerServlet.saveFail=FAIL - Configuration save failed: {0}
managerServlet.sessiondefaultmax=Default maximum session inactive interval 
{0} minutes
managerServlet.sessiontimeout={0} minutes:{1

RE: [PATCH] improved HTMLManagerServlet

[Anand Bashyam Narasimhan]

The UI mock up for the manager looks cool for now but it would help if we
can try to give a tree-based approach(I'm sure we will not make it like
those off-the shelf products but..something better and more dearer to TC4). 

Agreed that manager-application is not for the regular user but usability
still helps whether he is a developer or a simple user.

Anand

-Original Message-
From: Malcolm Edgar [mailto:[EMAIL PROTECTED]]
Sent: Friday, May 24, 2002 9:36 AM
To: [EMAIL PROTECTED]
Subject: Re: [PATCH] improved HTMLManagerServlet


Glenn Nielsen wrote:

>list.html wasn't attached.

Please cut & paste the HTML below.

Their is a virus on this PC jumping on the list.html file stopping it from 
being sent.

Regards Malcolm Edgar






  table { width: 100%; }
  td.page-title {
text-align: center;
vertical-align: top;
font-family:verdana,sans-serif;
font-weight: bold;
background: white;
color: black;
  }
  td.title {
text-align: left;
vertical-align: top;
font-family:verdana,sans-serif;
font-style:italic;
font-weight: bold;
background: #D2A41C;
  }
  td.header-left {
text-align: left;
vertical-align: top;
font-family:verdana,sans-serif;
font-weight: bold;
background: #FFDC75;
  }
  td.header-center {
text-align: center;
vertical-align: top;
font-family:verdana,sans-serif;
font-weight: bold;
background: #FFDC75;
  }
  td.row-left {
text-align: left;
vertical-align: middle;
font-family:verdana,sans-serif;
color: black;
background: white;
  }
  td.row-center {
text-align: center;
vertical-align: middle;
font-family:verdana,sans-serif;
color: black;
background: white;
  }
  td.row-right {
text-align: right;
vertical-align: middle;
font-family:verdana,sans-serif;
color: black;
background: white;
  }

Tomcat Manager









  Tomcat Manager







Applications


Path
Display Name
Running
Sessions
 


/
ROOT
true
-
 


/admin
 
false
0

  
  
  
  



/examples
 
true
0

  
  
  
  



/manager
 
true
0

  
  
  
  



/tomcat-docs
 
true
0

  
  
  
  



/webdav
 
true
0

  
  
  
  



Install



  Path:
  
   Config URL:
  
   WAR URL:
   
  







Memory Status


Total
Availabe
Percentage Used
Time
 


9,164 KB
3,799 KB
58 %
5/24/02 11:31 AM

  
  







Server


Server Version
JVM Version
JVM Vendor
OS Name
OS Version
OS Arch


Apache Tomcat/4.1.1
1.3.1_03-b03
Sun Microsystems Inc.
Windows 2000
5.0
x86






  Message: 









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Re: [PATCH] improved HTMLManagerServlet

[Malcolm Edgar]

Glenn Nielsen wrote:

>list.html wasn't attached.

Please cut & paste the HTML below.

Their is a virus on this PC jumping on the list.html file stopping it from 
being sent.

Regards Malcolm Edgar






  table { width: 100%; }
  td.page-title {
text-align: center;
vertical-align: top;
font-family:verdana,sans-serif;
font-weight: bold;
background: white;
color: black;
  }
  td.title {
text-align: left;
vertical-align: top;
font-family:verdana,sans-serif;
font-style:italic;
font-weight: bold;
background: #D2A41C;
  }
  td.header-left {
text-align: left;
vertical-align: top;
font-family:verdana,sans-serif;
font-weight: bold;
background: #FFDC75;
  }
  td.header-center {
text-align: center;
vertical-align: top;
font-family:verdana,sans-serif;
font-weight: bold;
background: #FFDC75;
  }
  td.row-left {
text-align: left;
vertical-align: middle;
font-family:verdana,sans-serif;
color: black;
background: white;
  }
  td.row-center {
text-align: center;
vertical-align: middle;
font-family:verdana,sans-serif;
color: black;
background: white;
  }
  td.row-right {
text-align: right;
vertical-align: middle;
font-family:verdana,sans-serif;
color: black;
background: white;
  }

Tomcat Manager









  Tomcat Manager







Applications


Path
Display Name
Running
Sessions
 


/
ROOT
true
-
 


/admin
 
false
0

  
  
  
  



/examples
 
true
0

  
  
  
  



/manager
 
true
0

  
  
  
  



/tomcat-docs
 
true
0

  
  
  
  



/webdav
 
true
0

  
  
  
  



Install



  Path:
  
   Config URL:
  
   WAR URL:
   
  







Memory Status


Total
Availabe
Percentage Used
Time
 


9,164 KB
3,799 KB
58 %
5/24/02 11:31 AM

  
  







Server


Server Version
JVM Version
JVM Vendor
OS Name
OS Version
OS Arch


Apache Tomcat/4.1.1
1.3.1_03-b03
Sun Microsystems Inc.
Windows 2000
5.0
x86






  Message: 









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Re: [PATCH] improved HTMLManagerServlet

[Malcolm Edgar]

Glenn Nielsen wrote:

>I have a number of comments.  First thanks for working on improving the
>HTMLManagerServlet.
>
>1.  GC should not be user initiated, it should be left to the JVM.
> In addition, when virtual hosting web sites, those who have permission
> to manage applications for a particluar host may not be the
> system admin for Tomcat.  I wouldn't want them to be able to trigger a 
>GC.
> The GC option needs to be removed.

I agree the GC should not generally be run by users, however the access to 
the manager app should limited to admins and developers, so I dont believe 
this would be an problem.

I had the experience of developing/profiling Tomcat apps located in the US 
while working in Australia for Avaya. To do this we developed a performance 
monitoring app, doing this sort of thing which was extremely useful.

>2.  The js which you added for onClick really isn't necessary.  The
> HTMLManagerServlet should be usable w/o JavaScript enabled
> in the browser. It should be removed.

How would you do this in a POST request? I could use GET request but params 
url string is exposed, though I suppose this doesn't really matter for this 
application.

>3.  The listing of memory usage isn't really needed if GC is removed.
> It doesn't provide info that is of benefit to someone
> who just manages web applications and is not the Tomcat sysad.
> A Tomcat sysad would be better off using the -verbose:gc arg to
> java when starting Tomcat so that they collect GC data which they
> can later graph to profile the Tomcat JVM memory usage.
>

I think it is handy to have a non-intrusive (although limited) way of 
examining memory status of servers in production or undergoing UAT.

That said I am not married to it, so I can remove it if required.

>These comments are just from a quick review of the code, I haven't
>compiled it and tried it out.
>
>
>list.html wasn't attached.

Please see attached file, not sure what happend the first time. Thanks for 
the feed back.

Regards Malcolm Edgar

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[PATCH] improved HTMLManagerServlet

[Malcolm Edgar]

Hi all,

Please see the proposed patch for HTMLManagerServlet. This provides an 
improved UI, memory and server reporting information, gc command, supports 
4.1 manager install command and internationalization.

This is almost a rewrite of HTMLManagerServlet, so the diff is not 
particularly informative.

Please see the attached files:
* list.html - example HTML output of list command
* HTMLManagerServlet.java - source code
* LocalStrings.properties - localization strings

Regards Malcolm Edgar



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HTMLManagerServlet.java
Description: JavaScript source

defaultservlet.directorylistingfor=Directory Listing for:
defaultservlet.upto=Up to:
defaultservlet.subdirectories=Subdirectories:
defaultservlet.files=Files:
htmlManagerServlet.appsTitle=Applications
htmlManagerServlet.appsPath=Path
htmlManagerServlet.appsName=Display Name
htmlManagerServlet.appsAvailable=Running
htmlManagerServlet.appsSessions=Sessions
htmlManagerServlet.appsStart=Start
htmlManagerServlet.appsStop=Stop
htmlManagerServlet.appsReload=Reload
htmlManagerServlet.appsRemove=Remove
htmlManagerServlet.installTitle=Install
htmlManagerServlet.installPath=Path:
htmlManagerServlet.installConfig=Config URL:
htmlManagerServlet.installWar=WAR URL:
htmlManagerServlet.installButton=Install
htmlManagerServlet.memoryTitle=Memory Status
htmlManagerServlet.memoryTotal=Total
htmlManagerServlet.memoryAvailable=Availabe
htmlManagerServlet.memoryUsed=Percentage Used
htmlManagerServlet.memoryTime=Time
htmlManagerServlet.memoryRefresh=Refresh
htmlManagerServlet.memoryRunGC=Run GC
htmlManagerServlet.messageLabel=Message:
htmlManagerServlet.serverTitle=Server
htmlManagerServlet.serverVersion=Server Version
htmlManagerServlet.serverJVMVersion=JVM Version
htmlManagerServlet.serverJVMVendor=JVM Vendor
htmlManagerServlet.serverOSName=OS Name
htmlManagerServlet.serverOSVersion=OS Version
htmlManagerServlet.serverOSArch=OS Arch
htmlManagerServlet.title=Tomcat Manager
invokerServlet.allocate=Cannot allocate servlet instance for path {0}
invokerServlet.cannotCreate=Cannot create servlet wrapper for path {0}
invokerServlet.deallocate=Cannot deallocate servlet instance for path {0}
invokerServlet.invalidPath=No servlet name or class was specified in path 
{0}
invokerServlet.notNamed=Cannot call invoker servlet with a named dispatcher
invokerServlet.noWrapper=Container has not called setWrapper() for this 
servlet
managerServlet.alreadyContext=FAIL - Application already exists at path {0}
managerServlet.alreadyDocBase=FAIL - Directory {0} is already in use
managerServlet.cannotInvoke=Cannot invoke manager servlet through invoker
managerServlet.configured=OK - Installed application from context file {0}
managerServlet.deployed=OK - Deployed application at context path {0}
managerServlet.exception=FAIL - Encountered exception {0}
managerServlet.installed=OK - Installed application at context path {0}
managerServlet.invalidPath=FAIL - Invalid context path {0} was specified
managerServlet.invalidWar=FAIL - Invalid application URL {0} was specified
managerServlet.listed=OK - Listed applications for virtual host {0}
managerServlet.listitem={0}:{1}:{2}:{3}
managerServlet.noAppBase=FAIL - Cannot identify application base for context 
path {0}
managerServlet.noCommand=FAIL - No command was specified
managerServlet.noContext=FAIL - No context exists for path {0}
managerServlet.noDirectory=FAIL - Non-directory document base for path {0}
managerServlet.noDocBase=FAIL - Cannot remove document base for path {0}
managerServlet.noGlobal=FAIL - No global JNDI resources are available
managerServlet.noPath=FAIL - No context path was specified
managerServlet.noReload=FAIL - Reload not supported on WAR deployed at path 
{0}
managerServlet.noRename=FAIL - Cannot deploy uploaded WAR for path {0}
managerServlet.noRole=FAIL - User does not possess role {0}
managerServlet.noWrapper=Container has not called setWrapper() for this 
servlet
managerServlet.reloaded=OK - Reloaded application at context path {0}
managerServlet.removed=OK - Removed application at context path {0}
managerServlet.resourcesAll=OK - Listed global resources of all types
managerServlet.resourcesType=OK - Listed global resources of type {0}
managerServlet.rolesList=OK - Listed security roles
managerServlet.saveFail=FAIL - Configuration save failed: {0}
managerServlet.sessiondefaultmax=Default maximum session inactive interval 
{0} minutes
managerServlet.sessiontimeout={0} minutes:{1} sessions
managerServlet.sessions=OK - Session information for application at context 
path {0}
managerServlet.started=OK - Started application at context path {0}
managerServlet.startFailed=FAIL - Application at context path {0} could not 
be started
managerServlet.stopped=OK - Stopped application at context path {0}
managerServlet.undeployed=OK - Undeployed application at context path {0}
managerServlet.un