3008762 - SAML authentication failed for SAP HANA cloud to use via JDBC

Created was a SAML authentication for a test to SAP HANA Cloud instance. In that special case, it was used OneLogin as Idp provider and an easy custom Java app running in tomcat as the Service Provider.

The Service Provider tries to connect to the HANA instance via JDBC using SAML authentication.
The certificate was uploaded to the HANA cockpit, created the SAML identity provider entry and created a mapping for the user.

Here occurs the following error: 
com.sap.db.jdbc.exceptions.SQLInvalidAuthorizationSpecExceptionSapDB: [10]: authentication failed at

SAP HANA DB Version 2.0

HANA, SAML, SSO, single sign-on, authentication, assertion, user parameter, mapping, external identity, database user, e-mail address, error, indexserver, xsengine , KBA , HAN-DB-SEC , SAP HANA Security & User Management , Problem