DBCP Connection Pool

[#1]

I have issue on DBCP Connection Pool : 
Database Connection URL :  jdbc:jtds:sqlserver://xx.xx.x.xx:xxxx/xxxx

Database Drive Class Name: net.sourceforge.jtds.jdbc.Driver
Database Driver Location(s): /home/xxxxx/nifi/nifixxx/nifi/lib/jtds-1.3.1.jar

I have issue for my DBCP Connection pool have error on the picture:
"Encountered unexpected failure when attempting to perform verification: java.lang.AbstractMethodError"
 

I'm in apache nifi 2-3 
and jdk-21 and on prod 
because my source is SQL Server 2000

should i upgrade SQL Server ? or double environment ?

because this is in one "ip address " on my server linux my apache nifi

please help this issue ..