You are getting below error while assigning some authorization role to the same logged user.
SAP DBTech JDBC: [7]: feature not supported: grantor and grantee are identical
Solution
Referring to the SAP Note 2589634 – SAP DBTech JDBC: [7]: feature not supported: grantor and grantee are identical, you need to use a different user that has the necessary GRANT privilege to grant the the privilege to the intended user.
