Installation on Win 10 failure.

2024-04-22 Thread DdC

I have installed tomcat originally with version 4.04 on winxp andlater on win7, 
ubuntu, and another linux box - many times by now.Trouble now with win10 and 
version 9.0.88.Yes, there is a jdk, CLASSPATH is set, j2ee.jar is in 
lib.Running in a cmd window with bin startup triggers another cmd windowto 
popup, shows errors flashing by and the 2nd window disappers. Running 
subsequently shutdown gives: Tomcat may not be running.Thanks a lot ...
Each next window version made installation more difficult - or i gotolder :-)
Is win10 creating trouble? Or ?
Thanks for help ...

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Even if not 
true::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09Y4WR9J7   9/11:: 
They had the Sun in their 
Eyeshttps://www.amazon.com/11-They-had-their-Eyes-ebook/dp/B0CMQ2WSK9https://www.amazon.nl/dp/B0CMQ2WSK9




Re: Installation on Win 10 failure.

2024-04-23 Thread DdC
(Connector.java:1012)---
I still suspect that win10 is messing things up; but what?
dennis de champeaux

--
Home page:      rs6.risingnet.net/~ddccMarketing site:  www . OntoOO.comKindle 
books:   Side Effects: Impacts on the 21st 
Century::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09MHJ5W48   
Even if not 
true::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09Y4WR9J7   9/11:: 
They had the Sun in their 
Eyeshttps://www.amazon.com/11-They-had-their-Eyes-ebook/dp/B0CMQ2WSK9https://www.amazon.nl/dp/B0CMQ2WSK9


 

On Tuesday, April 23, 2024 at 12:46:56 AM PDT, Mark Thomas 
 wrote:  
 
 

On 23/04/2024 03:31, DdC wrote:
> 
> I have installed tomcat originally with version 4.04 on winxp andlater on 
> win7, ubuntu, and another linux box - many times by now.Trouble now with 
> win10 and version 9.0.88.Yes, there is a jdk, CLASSPATH is set, j2ee.jar is 
> in lib.Running in a cmd window with bin startup triggers another cmd windowto 
> popup, shows errors flashing by and the 2nd window disappers.

Rather than running "startup.bat" use "catalina.bat run" which will keep 
the process in the same window and you'll be able to read any error message.

Alternatively, you could look in the logs directory. It is usually 
easiest if you empty the logs directory, attempt to start Tomcat and 
then check the log files for errors.

Mark



> Running subsequently shutdown gives: Tomcat may not be running.Thanks a lot 
>...
> Each next window version made installation more difficult - or i gotolder :-)
> Is win10 creating trouble? Or ?
> Thanks for help ...
> 
> --
> Home page:      rs6.risingnet.net/~ddccMarketing site:  www . 
> OntoOO.comKindle books:   Side Effects: Impacts on the 21st 
> Century::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09MHJ5W48   
> Even if not 
> true::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09Y4WR9J7   
> 9/11:: They had the Sun in their 
> Eyeshttps://www.amazon.com/11-They-had-their-Eyes-ebook/dp/B0CMQ2WSK9https://www.amazon.nl/dp/B0CMQ2WSK9
> 
> 
> 

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Win10 installation progress

2024-05-18 Thread DdC
Dear Tomcatters,
Gave up on installing 9.0.88. on Win10.  Succeeded with  10.1.23 
andjdk-18.0.2.1.The lib directory has j2ee.jar, which I have used in 
earliertomcat versions.Compilation of a system was OK apart from some warnings 
because Java haschanged since the code was written.There is a web.xml file in 
WEB-INF.Invoking a servlet gives a 500 error with the ominous complaint:    
class su.SUlogin cannot be cast to jakarta.servlet.Servlet    (su.SUlogin is in 
unnamed module of loader org.apache.catalina    ... )
Looks like that my code is quite out of date.Any suggestion for a fix?Going 
back to an earlier tomcat?
dennis de champeaux
--
Home page:      rs6.risingnet.net/~ddccMarketing site:  www . OntoOO.comKindle 
books:   Side Effects: Impacts on the 21st 
Century::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09MHJ5W48   
Even if not 
true::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09Y4WR9J7   9/11:: 
They had the Sun in their 
Eyeshttps://www.amazon.com/11-They-had-their-Eyes-ebook/dp/B0CMQ2WSK9https://www.amazon.nl/dp/B0CMQ2WSK9

Re: Win10 installation progress

2024-05-19 Thread DdC
n82...@gmail.com
Dear Chuck Caldarale,
THANKS for your help/ rolling up the sleeves now.
      Some of us have just given up on Windows entirelySure.I have installed 
tomcat also on two unix boxes among which ubuntu,2019 before the transition now 
required.Dealing here with a legacy situation.[[[ For your chuckles:: j2ee.jar 
was used in tomcat4.04 ]]]
THANKS AGAIN.{{{ Purpose of life: helping other people  - you did it. }}}
dennis de champeaux
--
Home page:      rs6.risingnet.net/~ddccMarketing site:  www . OntoOO.comKindle 
books:   Side Effects: Impacts on the 21st 
Century::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09MHJ5W48   
Even if not 
true::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09Y4WR9J7   9/11:: 
They had the Sun in their 
Eyeshttps://www.amazon.com/11-They-had-their-Eyes-ebook/dp/B0CMQ2WSK9https://www.amazon.nl/dp/B0CMQ2WSK9


 

On Saturday, May 18, 2024 at 10:11:09 PM PDT, Chuck Caldarale 
 wrote:  
 
 
> On May 18, 2024, at 22:40, DdC  wrote:
> 
> Gave up on installing 9.0.88. on Win10. 


Some of us have just given up on Windows entirely…


> Succeeded with  10.1.23 andjdk-18.0.2.1.The lib directory has j2ee.jar, which 
> I have used in earliertomcat versions.


Not lately. I can’t recall when j2ee.jar was last useful, but I’m pretty sure 
it’s been well over a decade. You most likely need to delete it.


> Compilation of a system was OK apart from some warnings because Java 
> haschanged since the code was written.There is a web.xml file in 
> WEB-INF.Invoking a servlet gives a 500 error with the ominous complaint:    
> class su.SUlogin cannot be cast to jakarta.servlet.Servlet    (su.SUlogin is 
> in unnamed module of loader org.apache.catalina    ... )


First, look at the Tomcat migration guides: 
https://tomcat.apache.org/migration.html

You’ll need to review each one, starting with the last version of Tomcat you 
were using, up to the one for 10.1. In particular, when Oracle gave control of 
the Java EE spec to Eclipse, the classes were renamed from javax to jakarta for 
legal reasons, so all code using the old class names must be updated to the 
revised ones. This can be done with a migration tool supplied by Tomcat:

https://tomcat.apache.org/download-migration.cgi

or by placing old apps in the webapps-javaee directory rather than webapps and 
letting Tomcat convert them automatically. Look at the documentation for the 
legacyAppBase attribute of the  element:

https://tomcat.apache.org/tomcat-10.1-doc/config/host.html#Common_Attributes

  - Chuck

  

Re: Win10 installation progress

2024-07-08 Thread DdC
Still struggling launching my hck app on Win10 & tomcat 9.0.88.It runs (dont 
laugh) on: XP/Win7 & tomcat 4.0.4 Linux-gnu & tomcat 6.0.32
Tomcat 9.0.88 displays fine with localhost:8080.
App hck compiles OK (dont laugh) with a script 
using:CLASSPATH=.;c:\tomcat4\j2ee.jar;c:\tomcat4\webapps\hck\WEB-INF\classes;c:\tomcat4\lib\
Starting subsequently tomcat4 hiccups with:<<<<>>>>
Why, oh why does this tomcat not accept what has been compiled withj2ee.jar??

Using the classpath without j2ee.jar:    
CLASSPATH=.;c:\tomcat4\webapps\hck\WEB-INF\classes;c:\tomcat4\lib\the 
compilation of the hck app fails early 
with:<<<<javac *.javaZAjax.java:9: 
error: cannot find symbolpublic class ZAjax extends HttpServlet {               
            ^  symbol: class HttpServletZAjax.java:12: error: cannot find 
symbol    public void doGet (HttpServletRequest req,                       ^  
symbol:   class HttpServletRequest  location: class ZAjax >>>>>

Why, oh why is the servlet infrastructure not found? 
BTW tomcat 8 is not available anymore, neither on the backup site ...
dennis de 
champeaux--
Home page:      rs6.risingnet.net/~ddccMarketing site:  www . OntoOO.comKindle 
books:   Side Effects: Impacts on the 21st 
Century::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09MHJ5W48   
Even if not 
true::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09Y4WR9J7   9/11:: 
They had the Sun in their 
Eyeshttps://www.amazon.com/11-They-had-their-Eyes-ebook/dp/B0CMQ2WSK9https://www.amazon.nl/dp/B0CMQ2WSK9


 

On Tuesday, May 21, 2024 at 08:38:02 AM PDT, Christopher Schultz 
 wrote:  
 
 Hello,

On 5/18/24 23:40, DdC wrote:
> Gave up on installing 9.0.88. on Win10.

Why did you give up? ZIP installation is a single command (either via 
CMD or UI shell). EXE installer is pretty straightforward, too. There's 
also a third-party installer that has a few more features including the 
ability to upgrade an existing installation. (I recommend against 
upgrading an existing installation specifically, but that's not a 
recommendation against that third-party installer.)

Do you mean you gave up trying to get your application running on it?

> Succeeded with  10.1.23 andjdk-18.0.2.1.

Why Java 18? It's been EOL for years at this point. You should use Java 
21 these days for anything new.

Did you know that Tomcat 10 is fundamentally different than previous 
versions?

> The lib directory has j2ee.jar, which I have used in earliertomcat versions.

What does j2ee.jar contain? That seems so unspecific as to be problematic.

> Compilation of a system was OK apart from some warnings because Java
> has changed since the code was written.
?

> There is a web.xml file in WEB-INF.

Okay...

> Invoking a servlet gives a 500 error with the ominous complaint:
> class su.SUlogin cannot be cast to jakarta.servlet.Servlet
> (su.SUlogin is in unnamed module of loader org.apache.catalina    ...
> ) Looks like that my code is quite out of date.Any suggestion for a
> fix?Going back to an earlier tomcat?
Did you read the migration guide for Tomcat 10.1?

I would highly recommend going back to 9.0 for the time being. If you 
remove j2ee.jar, does your project compile? If not, what errors do you 
get (missing classes, of course, but what major packages are missing)?

j2ee.jar sounds like an uber-jar with "everything we need in it" without 
any specificity. You should replace that with modern, separate libraries 
that support your application.

-chris

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Re: Win10 installation progress

2024-07-16 Thread DdC
Dear Christopher,
Thanks for all your advice.Progress here.The port regards hck app (for medical 
diagnosis) with 6.1Mb source ofwhich 4.6Mb java code.Have been able to compile 
without using j2ee.jar (with a dos .batscript tackling 19 directories, 
etc.)Used instead in CLASSPATH files in lib: 
servlet-api.jar,javax.mail.jar,javax.activation.jar. There IS a web.xml file in 
WEB-INF with, among the others, forcom.ZAjax: 
          com.ZAjax      
com.ZAjax    
          com.ZAjax      
com.ZAjax    
Starting up tomcat 9.0.88 still hiccups when hck is encountered.The catalina 
log is attached.
Seems to be close ... :-)))dennis de champeaux
[[ Next week will present a paper 'Medical Diagnosis Algorithm at a conference. 
:--]]
--
Home page:      rs6.risingnet.net/~ddccMarketing site:  www . OntoOO.comKindle 
books:   Side Effects: Impacts on the 21st 
Century::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09MHJ5W48   
Even if not 
true::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09Y4WR9J7   9/11:: 
They had the Sun in their 
Eyeshttps://www.amazon.com/11-They-had-their-Eyes-ebook/dp/B0CMQ2WSK9https://www.amazon.nl/dp/B0CMQ2WSK9
On Tuesday, July 9, 2024 at 06:29:41 AM PDT, Christopher Schultz 
 wrote:  
 
 Dennis,

On 7/8/24 17:05, DdC wrote:
> Still struggling launching my hck app on Win10 & tomcat 9.0.88.It
> runs (dont laugh) on: XP/Win7 & tomcat 4.0.4 Linux-gnu & tomcat
> 6.0.32
Tomcat 9 ought to be able to run a Servlet-2.0-era application just fine 
unless you use one or two things that have been deprecated and won't 
work anymore (20 years later).

> Tomcat 9.0.88 displays fine with localhost:8080.

Do you mean that the ROOT application ("Welcome to Tomcat") runs? I 
wouldn't expect anything less.

What version of Java are you using, now? Hopefully it's at least 17 or 21.

> App hck compiles OK (dont laugh) with a script 
> using:CLASSPATH=.;c:\tomcat4\j2ee.jar;c:\tomcat4\webapps\hck\WEB-INF\classes;c:\tomcat4\lib\

This isn't a script. Can you post the whole thing?

> Starting subsequently tomcat4 hiccups with:<<<< JDK_JAVA_OPTIONS:  --add-opens=java.base/java.lang=ALL-UNNAMED 
> --add-opens=java.base/java.io=ALL-UNNAMED 
> --add-opens=java.base/java.util=ALL-UNNAMED 
> --add-opens=java.base/java.util.concurrent=ALL-UNNAMED 
> --add-opens=java.rmi/sun.rmi.transport=ALL-UNNAMED08-Jul-2024 12:00:24.731 
> INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server 
> version name:   Apache Tomcat/9.0.8808-Jul-2024 12:00:24.748 INFO [main] 
> org.apache.catalina.startup.VersionLoggerListener.log Server built:          
> Apr 9 2024 13:22:30 UTC08-Jul-2024 12:00:24.748 INFO [main] 
> org.apache.catalina.startup.VersionLoggerListener.log Server version number: 
> 9.0.88.008-Jul-2024 12:00:24.748 INFO 
> [main]org.apache.catalina.startup.VersionLoggerListener.log OS Name:Windows 
> 10..08-Jul-2024 12:00:27.313 INFO [main] 
> org.apache.catalina.startup.HostConfig.deployDirectory Deploying web 
> application directory [C:\tomcat4\webapps\hck]08-Jul-2024 12:00:30.041 SEVERE 
> [main] org.apache.catalina.startup.HostConfig.deployDirectory Error deploying 
> web application directory [C:\tomcat4\webapps\hck]        
> java.lang.IllegalStateException: Error starting child                at 
> org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:690)
>                 at 
> org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:659)       
>          
> atorg.apache.catalina.core.StandardHost.addChild(StandardHost.java:661)at... 
> ... ...>>>>>
> Why, oh why does this tomcat not accept what has been compiled withj2ee.jar??

This copy-pasta is very difficult to read. Can you sent it without ... 
re-formatting or whatever else is going on with your email sender?

Your error does not contain the "real error". If there are 50 lines of 
stack trace, please post them ALL. Otherwise it will not be possible to 
tell what the root problem is.

You have a runtime error above and a compiler error below. It's tough to 
follow your journey, here.

Definitely do not put j2ee.jar into your web application's WEB-INF/lib 
directory.

> Using the classpath without j2ee.jar:    
> CLASSPATH=.;c:\tomcat4\webapps\hck\WEB-INF\classes;c:\tomcat4\lib\the 
> compilation of the hck app fails early 
> with:<<<<javac 
> *.javaZAjax.java:9: error: cannot find symbolpublic class ZAjax extends 
> HttpServlet {                           ^  symbol: class 
> HttpServletZAjax.java:12: error: cannot find symbol    public void doGet 
> (HttpServletRequest req,                       ^  symbol:   class 
> HttpServletRequest  location: class ZAjax >>>>>

 > Why, oh why is the serv

Re: Win10 installation progress

2024-07-16 Thread DdC
Dear Christopher,
Link to catalina log is below
Thanks for all your advice.Progress here.The port regards hck app (for medical 
diagnosis) with 6.1Mb source ofwhich 4.6Mb java code.Have been able to compile 
without using j2ee.jar (with a dos .batscript tackling 19 directories, 
etc.)Used instead in CLASSPATH files in lib: 
servlet-api.jar,javax.mail.jar,javax.activation.jar. There IS a web.xml file in 
WEB-INF with, among the others, forcom.ZAjax: 
          com.ZAjax      
com.ZAjax    
          com.ZAjax      
com.ZAjax    
Starting up tomcat 9.0.88 still hiccups when hck is encountered.The catalina 
log is at:
https://www.ontooo.com/catalina.log

Seems to be close ... :-)))dennis de champeaux
[[ Next week will present a paper 'Medical Diagnosis Algorithm at a conference. 
:--]]


--
Home page:      rs6.risingnet.net/~ddccMarketing site:  www . OntoOO.comKindle 
books:   Side Effects: Impacts on the 21st 
Century::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09MHJ5W48   
Even if not 
true::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09Y4WR9J7   9/11:: 
They had the Sun in their 
Eyeshttps://www.amazon.com/11-They-had-their-Eyes-ebook/dp/B0CMQ2WSK9https://www.amazon.nl/dp/B0CMQ2WSK9
On Tuesday, July 16, 2024 at 02:18:17 PM PDT, Chuck Caldarale 
 wrote:  
 
 

> On Jul 16, 2024, at 15:57, DdC  wrote:
> 
> Dear Christopher,
> 
> Thanks for all your advice.
> Progress here.
> The port regards hck app (for medical diagnosis) with 6.1Mb source of
> which 4.6Mb java code.
> Have been able to compile without using j2ee.jar (with a dos .bat
> script tackling 19 directories, etc.)
> Used instead in CLASSPATH files in lib: 
> servlet-api.jar,
> javax.mail.jar,
> javax.activation.jar. 
> There IS a web.xml file in WEB-INF with, among the others, for
> com.ZAjax: 
> 
>    
>      com.ZAjax
>      com.ZAjax
>    
> 
>    
>      com.ZAjax
>      com.ZAjax
>    
> 
> Starting up tomcat 9.0.88 still hiccups when hck is encountered.
> The catalina log is attached.


Attachments are stripped by the mailing list handler; could you post the log 
directly into the message (if not too big), or at some publicly accessible 
location?

  - Chuck



> Seems to be close ... :-)))
> dennis de champeaux
> 
> [[ Next week will present a paper 'Medical Diagnosis Algorithm at a 
> conference. :--]]
> 
> --
> 
> Home page:      rs6.risingnet.net/~ddcc
> Marketing site:  www . OntoOO.com
> Kindle books:
>    Side Effects: Impacts on the 21st Century::
> https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09MHJ5W48
>    Even if not true::
> https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09Y4WR9J7
>    9/11:: They had the Sun in their Eyes
> https://www.amazon.com/11-They-had-their-Eyes-ebook/dp/B0CMQ2WSK9
> https://www.amazon.nl/dp/B0CMQ2WSK9
> 
> On Tuesday, July 9, 2024 at 06:29:41 AM PDT, Christopher Schultz 
>  wrote:
> 
> 
> Dennis,
> 
> On 7/8/24 17:05, DdC wrote:
> > Still struggling launching my hck app on Win10 & tomcat 9.0.88.It
> > runs (dont laugh) on: XP/Win7 & tomcat 4.0.4 Linux-gnu & tomcat
> > 6.0.32
> Tomcat 9 ought to be able to run a Servlet-2.0-era application just fine 
> unless you use one or two things that have been deprecated and won't 
> work anymore (20 years later).
> 
> > Tomcat 9.0.88 displays fine with localhost:8080.
> 
> Do you mean that the ROOT application ("Welcome to Tomcat") runs? I 
> wouldn't expect anything less.
> 
> What version of Java are you using, now? Hopefully it's at least 17 or 21.
> 
> > App hck compiles OK (dont laugh) with a script 
> > using:CLASSPATH=.;c:\tomcat4\j2ee.jar;c:\tomcat4\webapps\hck\WEB-INF\classes;c:\tomcat4\lib\
> 
> This isn't a script. Can you post the whole thing?
> 
> > Starting subsequently tomcat4 hiccups with:<<<< > JDK_JAVA_OPTIONS:  --add-opens=java.base/java.lang=ALL-UNNAMED 
> > --add-opens=java.base/java.io=ALL-UNNAMED 
> > --add-opens=java.base/java.util=ALL-UNNAMED 
> > --add-opens=java.base/java.util.concurrent=ALL-UNNAMED 
> > --add-opens=java.rmi/sun.rmi.transport=ALL-UNNAMED08-Jul-2024 12:00:24.731 
> > INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server 
> > version name:  Apache Tomcat/9.0.8808-Jul-2024 12:00:24.748 INFO [main] 
> > org.apache.catalina.startup.VersionLoggerListener.log Server built:         
> >  Apr 9 2024 13:22:30 UTC08-Jul-2024 12:00:24.748 INFO [main] 
> > org.apache.catalina.startup.VersionLoggerListener.log Server version 
> > number: 9.0.88.008-Jul-2024 12:00:24.748 INFO 
> 

Re: Win10 installation progress

2024-07-19 Thread DdC
Dear Chuck,
All good news.There were only a few bad entries in the web.xml file.Replacing 
j2eer.jar with:    servlet-api.jar    javax.mail.jar    javax.activation.jarwas 
not necessary for my code written during 1999-2005.The Java code had warnings 
due to deprecated constructs, but it wasexecuting fine.
Thanks a lot.  We need more people like you and your folke.Tomcat has been 
around for 25(?) years !!!Here a present for all of you:       
http://www.ontooo.com/AIAssessment2.pdfwhich was presented Feb 1 at a 
conference.[My next paper takes the chat-systems further apart ...]dennis de 
champeauxBTW Medical diagnosis over the Web (pushed by Google and others) is 
not realistic:       http://www.ontooo.com/Diagnosis.pdfwill be presented next 
week at a conference.
--
Home page:      rs6.risingnet.net/~ddccMarketing site:  www . OntoOO.comKindle 
books:   Side Effects: Impacts on the 21st 
Century::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09MHJ5W48   
Even if not 
true::https://www.amazon.com/-/es/Dennis-Champeaux-ebook/dp/B09Y4WR9J7   9/11:: 
They had the Sun in their 
Eyeshttps://www.amazon.com/11-They-had-their-Eyes-ebook/dp/B0CMQ2WSK9https://www.amazon.nl/dp/B0CMQ2WSK9


 

On Wednesday, July 17, 2024 at 04:25:47 PM PDT, Chuck Caldarale 
 wrote:  
 
 
> On Jul 16, 2024, at 18:45, DdC  wrote:
> 
> Link to catalina log is below


Which shows this error:

Caused by: java.lang.IllegalArgumentException: Invalid  
[com.ZAjax] in servlet mapping


> Thanks for all your advice.Progress here.The port regards hck app (for 
> medical diagnosis) with 6.1Mb source ofwhich 4.6Mb java code.Have been able 
> to compile without using j2ee.jar (with a dos .batscript tackling 19 
> directories, etc.)Used instead in CLASSPATH files in lib: 
> servlet-api.jar,javax.mail.jar,javax.activation.jar. There IS a web.xml file 
> in WEB-INF with, among the others, forcom.ZAjax: 
>          com.ZAjax      
>com.ZAjax    
>          com.ZAjax      
>com.ZAjax    


(You really need to use an e-mail client that doesn’t destroy formatting.)

Refer to section 12.2 of the servlet spec to see what the valid patterns are:
https://javaee.github.io/servlet-spec/downloads/servlet-4.0/servlet-4_0_FINAL.pdf

If this is the only servlet in the app, you may want to use just a slash or an 
empty string for the URL pattern.

  - Chuck


> Starting up tomcat 9.0.88 still hiccups when hck is encountered.The catalina 
> log is at:
> https://www.ontooo.com/catalina.log