Peter Lebedev added a comment - 2020-06-01 20:33 - edited Tried using ro-cluster end point and the driver is unable to connect. Put back the cluster end point, and it worked again: Caused by: java.sql.SQLException: Communications link failure with primary. No active connection found for master. at org.mariadb.jdbc.internal.failover.AbstractMastersListener.throwFailoverMessage(AbstractMastersListener.java: 563 ) ~[mariadb-java-client- 2.6 . 0 .jar:?] at org.mariadb.jdbc.internal.failover.impl.MastersSlavesListener.checkInitialConnection(MastersSlavesListener.java: 350 ) ~[mariadb-java-client- 2.6 . 0 .jar:?] at org.mariadb.jdbc.internal.failover.impl.MastersSlavesListener.initializeConnection(MastersSlavesListener.java: 179 ) ~[mariadb-java-client- 2.6 . 0 .jar:?] at org.mariadb.jdbc.internal.failover.FailoverProxy.<init>(FailoverProxy.java: 120 ) ~[mariadb-java-client- 2.6 . 0 .jar:?] at org.mariadb.jdbc.internal.util.Utils.retrieveProxy(Utils.java: 607 ) ~[mariadb-java-client- 2.6 . 0 .jar:?] at org.mariadb.jdbc.MariaDbConnection.newConnection(MariaDbConnection.java: 150 ) ~[mariadb-java-client- 2.6 . 0 .jar:?] at org.mariadb.jdbc.MariaDbDataSource.getConnection(MariaDbDataSource.java: 275 ) ~[mariadb-java-client- 2.6 . 0 .jar:?] at org.mariadb.jdbc.MariaDbDataSource.getXAConnection(MariaDbDataSource.java: 453 ) ~[mariadb-java-client- 2.6 . 0 .jar:?] at com.atomikos.jdbc.AtomikosXAConnectionFactory.createPooledConnection(AtomikosXAConnectionFactory.java: 43 ) ~[transactions-jdbc- 4.0 . 6 .jar:?] ... 24 more The connection string is something like this, with aurora mode: jdbc:mariadb:aurora://<some.cluster-ro.region.rds.amazonaws.com>/db