giving unknown host exception

Question

org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcEnvironmentInitiator.java:437) ~[hibernate-core-6.5.2.Final.jar!/:6.5.2.Final]

at org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl.getIsolatedConnection(DdlTransactionIsolatorNonJtaImpl.java:46) ~[hibernate-core-6.5.2.Final.jar!/:6.5.2.Final]

... 46 common frames omitted

Caused by: java.net.UnknownHostException: postgres.railway.internal

at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:567) ~[na:na]

at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327) ~[na:na]

at java.base/java.net.Socket.connect(Socket.java:633) ~[na:na]

at org.postgresql.core.PGStream.createSocket(PGStream.java:243) ~[postgresql-42.7.3.jar!/:42.7.3]

at org.postgresql.core.PGStream.(PGStream.java:98) ~[postgresql-42.7.3.jar!/:42.7.3]

at org.postgresql.core.v3.ConnectionFactoryImpl.tryConnect(ConnectionFactoryImpl.java:136) ~[postgresql-42.7.3.jar!/:42.7.3]

at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:262) ~[postgresql-42.7.3.jar!/:42.7.3]

... 60 common frames omitted

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