I do not think so the issue seems related to the upgrade not the OS.

> El 5 oct 2021, a las 21:09, Daniel Burns <[email protected]> 
> escribió:
> 
> Thank you.  I wanted to at least respond.  This is in DEV so I can 
> definitely try different things.  Using what you stated, I can mimic PROD and 
> create a new DEV server with a fresh OS.  I assume there are no issues with 
> using AWS Amazon Linux 2, instead of RHEL Linux?
> 
> Thank you.
> 
>> On Sunday, October 3, 2021 at 6:13:09 AM UTC-5 [email protected] wrote:
>> It is not clear what it is the current issue you want to resolve, so my 
>> suggestion is to start again the first case you expose.
>> 
>> >On my first try, I thought I had upgraded, but I did not realize that the 
>> >version of WAR file was the same (2.263.1) I upgraded the plugins, then 
>> >realized that it had not been upgraded to 2.303.1, so then I put the new 
>> >WAR file in place.  I was able to log in just fine, but one of the most 
>> >important pipelines I have did not work.  I makes a call out to Gitlab and 
>> >I update Gitlab at the same time.
>> 
>> Before upgrading the production environment try to upgrade the same system 
>> but in another machine:
>> 
>> * In a new machine
>> * Copy the JENKINS_HOME folder to the new server in the same place
>> * Remove the folder JENKINS_HOME/nodes/* (we do not want to use the 
>> production Agents)
>> * Start Jenkins in the new machine 
>> * Upgrade the plugins
>> * Stop Jenkins
>> * Update the war
>> * Start Jenkins
>> * Create a new Agent that fit the requirements of your important pipeline
>> * Test the pipeline
>> 
>> At this point you'd have the same issue you face at the beginning, to try to 
>> troubleshoot it you need to check
>> * Check the Jenkins logs from the start to the execution of the pipeline, we 
>> are looking for exceptions 
>> * Check the console log of the pipeline to see which error is causing the 
>> pipeline to not work
>> * check the logs of the Agent in case we are error there
>> * Check the manage Jenkins and check there is no warning or error at the top 
>> of the page
>> 
>> If you provide the exceptions you found we could help you to point to a 
>> specific fix. 
>> My guess is that you have a problem with a plugin version, it could be that 
>> it conflicts with another, 
>> or your pipeline needs a specific version of a plugin.
>> 
>>> El viernes, 1 de octubre de 2021 a las 19:51:26 UTC+2, 
>>> [email protected] escribió:
>>> I put a new WAR in place and restart and normally, no issues at all.
>>> 
>>> I have RedHat 6 running on an AWS EC2.  
>>> 
>>> On my first try, I thought I had upgraded, but I did not realize that the 
>>> version of WAR file was the same (2.263.1) I upgraded the plugins, then 
>>> realized that it had not been upgraded to 2.303.1, so then I put the new 
>>> WAR file in place.  I was able to log in just fine, but one of the most 
>>> important pipelines I have did not work.  I makes a call out to Gitlab and 
>>> I update Gitlab at the same time.
>>> 
>>> I went backwards to snapshots I made of the two servers before I upgraded.  
>>> Validated that the pipeline works, then upgraded Gitlab fully tested and 
>>> the pipeline worked.  So I narrowed the issue to Jenkins.  I tried the 
>>> upgrade again, without updating the plugins first.  This time, I got an 
>>> error on login page, If I clicked on Login, it gives me a prompt to put my 
>>> ID and password, upon hitting enter it gives me a 403 crumb error.  We use 
>>> A/D to validate credentials.
>>> 
>>> I have tried several times, even trying to go down to the LTS right after 
>>> the 2.263 release same issue.  At this point I am assuming I have a plugin 
>>> problem.
>>> 
>>> I tried to look at the log and even created the logging.properties file but 
>>> I don't see anything glaringly obvious there either.
>>> 
>>> Can someone assist, suggest something?
>>> 
>>> Thank you
>>> Daniel 
> 
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