So I tried the jstack command and I got the attached file. 
To my understanding the problem is with Accumulo (?). I did a force shut down 
to the service and then started it again. 
Nothing changed to the logs or the jstack command after that, though. 

Maria. 
    Στις Παρασκευή, 6 Μαρτίου 2020, 07:04:27 π.μ. EET, ο χρήστης Jody Garnett 
<jody.garn...@gmail.com> έγραψε:  
 
 Get a print out of what java things it is doing. Maybe we can spot what is 
stuck?
Look up the process id:
ps -ef | grep java
And then:
Ask nicely:   jstack -l <process id> >> threads.log 
Or just interrupt:   kill -QUIT <process id>
--Jody Garnett

On Thu, 5 Mar 2020 at 07:07, Maria Krommyda via Geoserver-users 
<geoserver-users@lists.sourceforge.net> wrote:

Hello everyone, 
I tried to renew my web page certificate (running on Tomcat independently from 
the Geoserver (version 2.12.2)).
I used the auto-renew option for the certbot. 
After that the Geoserver stopped starting. 
It freezes after:  WARN [util.NativeCodeLoader] - Unable to load native-hadoop 
library for your platform... using builtin-java classes where applicable
There are no changes on the log up to that point or any other errors that I can 
find.
I tried to reverse the changes certbot made, including uninstalling it, 
deleting its files and reinstalling apache2 but nothing seems to work. 
Any ideas are more than welcome. 
Best regards, Maria. _______________________________________________
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Attachment: threads.log
Description: Binary data

_______________________________________________
Geoserver-users mailing list

Please make sure you read the following two resources before posting to this 
list:
- Earning your support instead of buying it, but Ian Turton: 
http://www.ianturton.com/talks/foss4g.html#/
- The GeoServer user list posting guidelines: 
http://geoserver.org/comm/userlist-guidelines.html

If you want to request a feature or an improvement, also see this: 
https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer


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