Hey Patrick,
Progress. I had not put a value for the host.name in the cas.properties 
file. I put shuauth01.sacredheart.edu in for that, restarted Tomcat, and 
now see shuauth01.sacredheart.edu in the response URL:
e.g., 
https://shuauth01.sacredheart.edu:8443/mywebapp/?ticket=ST-2-VoXHsagxdYfJxpdIVXW5-shuauth01.sacredheart.edu.
Unfortunately, I get exactly the same error message as before.
Thanx again.

-Chip

On Friday, October 14, 2016 at 11:57:07 AM UTC-4, Patrick Gardella wrote:
>
> What do you have configured for host.name on the CAS side of things > 
> cas.properties?  It looks like older versions of the code used 
> cas01.example.org as the default value for that variable. 
>
> On Fri, Oct 14, 2016 at 10:54 AM, Chip Work <[email protected] 
> <javascript:>> wrote:
>
>> Patrick,
>>
>> As you suggested, I did a search for the string value cas01.example.org 
>> in my project. Unfortunately, the only place I find this string is in the 
>> /js/test_data.json files.
>> Am I missing something here.
>> Thanx again for your help.
>>
>> -Chip
>>
>> On Friday, October 14, 2016 at 9:10:06 AM UTC-4, Patrick Gardella wrote:
>>>
>>> Take a look at the URL you are getting the 500 error on:
>>>
>>>
>>> https://shuauth01.sacredheart.edu:8443/mywebapp/?ticket=ST-4-cQ2Pw1U9c9rJgMDMTyR3-cas01.example.org
>>>  
>>>
>>> So you don't have the cas server configured correctly. Search for 
>>> cas01.example.org and replace it with shuauth01.sacredheart.edu
>>>
>>> The sample webapp is connecting to CAS correctly, but then it tries to 
>>> validate against the CAS server, but it has the wrong.  It can't validate 
>>> that ticket against example.org
>>>
>>> Patrick
>>>
>>> On Thu, Oct 13, 2016 at 3:56 PM, Chip Work <[email protected]> wrote:
>>>
>>>> Yes Sir. the user is in my AD.
>>>> If I just browse to the cas server (e.g., 
>>>> https://shuauth01.sacredheart.edu:8443/cas/login), enter the same 
>>>> username and password. I get a proper authentication.
>>>> I get the error message when I try redirection.
>>>> For example, I browse to 
>>>> https://shuauth01.sacredheart.edu:8443/cas/login?service=https%3A%2F%2Fshuauth01.sacredheart.edu%3A8443%2Fmywebapp/
>>>>  
>>>> This gets me to the cas login page; but upon entering the username and 
>>>> password and clicking on login, I am redirected to:
>>>>
>>>> https://shuauth01.sacredheart.edu:8443/mywebapp/?ticket=ST-4-cQ2Pw1U9c9rJgMDMTyR3-cas01.example.org
>>>>  
>>>> and get the error 500 page.
>>>>
>>>> -Chip 
>>>>
>>>>
>>>> On Thursday, October 13, 2016 at 3:16:45 PM UTC-4, Patrick Gardella 
>>>> wrote:
>>>>>
>>>>> The user you are validating has a sAMAccountName in LDAP/AD, correct?
>>>>>
>>>>> On Thu, Oct 13, 2016 at 2:28 PM, Chip Work <[email protected]> wrote:
>>>>>
>>>>>> Here is my deployConfigContext.xml file.
>>>>>> Thanx for your assistance.
>>>>>>
>>>>>> -Chip
>>>>>>
>>>>>> On Thursday, October 13, 2016 at 1:22:09 PM UTC-4, Patrick Gardella 
>>>>>> wrote:
>>>>>>>
>>>>>>> Can you post your deployerConfigContext.xml file? Specifically, 
>>>>>>> the ldapAuthenticationHandler bean section, if you don't want to post 
>>>>>>> it 
>>>>>>> all.
>>>>>>>
>>>>>>> You are using old instructions.  Take a look at the new instructions 
>>>>>>> at: 
>>>>>>>
>>>>>>> https://apereo.github.io/cas/4.2.x/installation/Maven-Overlay-Installation.html
>>>>>>>
>>>>>>> Patrick+
>>>>>>>
>>>>>>> On Thu, Oct 13, 2016 at 1:08 PM, Chip Work <[email protected]> 
>>>>>>> wrote:
>>>>>>>
>>>>>>>> I am using Tomcat 8 on Centos 7 with Java 8.
>>>>>>>> I have loaded the war file built with maven using CAS 4.2.5 
>>>>>>>> including the ldap handler.
>>>>>>>> I have loaded the "mywebapp" war file built with maven as suggested 
>>>>>>>> in: 
>>>>>>>> https://wiki.jasig.org/display/CASC/JA-SIG+Java+Client+Simple+WebApp+Sample
>>>>>>>> I start tomcat and do not any significant errors in the 
>>>>>>>> catalina.out file or the cas.log file.
>>>>>>>> However when I test my cas deployment with the test site I get the 
>>>>>>>> following error:
>>>>>>>>
>>>>>>>> HTTP Status 500 - 
>>>>>>>> org.jasig.cas.client.validation.TicketValidationException: No 
>>>>>>>> principal was 
>>>>>>>> found in the response from the CAS server.
>>>>>>>>
>>>>>>>> *type* Exception report
>>>>>>>>
>>>>>>>> *message* *org.jasig.cas.client.validation.TicketValidationException: 
>>>>>>>> No principal was found in the response from the CAS server.*
>>>>>>>>
>>>>>>>> *description* *The server encountered an internal error that 
>>>>>>>> prevented it from fulfilling this request.*
>>>>>>>>
>>>>>>>> *exception*
>>>>>>>>
>>>>>>>> javax.servlet.ServletException: 
>>>>>>>> org.jasig.cas.client.validation.TicketValidationException: No 
>>>>>>>> principal was found in the response from the CAS server.
>>>>>>>>        
>>>>>>>> org.jasig.cas.client.validation.AbstractTicketValidationFilter.doFilter(AbstractTicketValidationFilter.java:152)
>>>>>>>>
>>>>>>>> *root cause*
>>>>>>>>
>>>>>>>> org.jasig.cas.client.validation.TicketValidationException: No 
>>>>>>>> principal was found in the response from the CAS server.
>>>>>>>>        
>>>>>>>> org.jasig.cas.client.validation.Cas20ServiceTicketValidator.parseResponseFromServer(Cas20ServiceTicketValidator.java:74)
>>>>>>>>        
>>>>>>>> org.jasig.cas.client.validation.AbstractUrlBasedTicketValidator.validate(AbstractUrlBasedTicketValidator.java:165)
>>>>>>>>        
>>>>>>>> org.jasig.cas.client.validation.AbstractTicketValidationFilter.doFilter(AbstractTicketValidationFilter.java:129)
>>>>>>>>  
>>>>>>>>
>>>>>>>> *note* *The full stack trace of the root cause is available in the 
>>>>>>>> Apache Tomcat/8.0.37 logs.*
>>>>>>>>
>>>>>>>> Pls advice me as to why I might get this message.
>>>>>>>> Thanx. 
>>>>>>>>
>>>>>>>> -- 
>>>>>>>> CAS gitter chatroom: https://gitter.im/apereo/cas
>>>>>>>> CAS mailing list guidelines: 
>>>>>>>> https://apereo.github.io/cas/Mailing-Lists.html
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>>>>>>>
>>>>>>> -- 
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>>>>>> CAS mailing list guidelines: 
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>>>>>>
>>>>>
>>>>> -- 
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>>>> CAS mailing list guidelines: 
>>>> https://apereo.github.io/cas/Mailing-Lists.html
>>>> CAS documentation website: https://apereo.github.io/cas
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>>>> .
>>>>
>>>
>>> -- 
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>> CAS mailing list guidelines: 
>> https://apereo.github.io/cas/Mailing-Lists.html
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>

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