JDBC p/ Oracle

Uma pergunta, voce esta tentando conectar os dois ao mesmo tempo?
Se ajudar ai esta o motivo do erro e as ãções que devem ser tomadas para tentar resolver os problemas

Cause: The listener received a request to establish a connection to a database or other service. The connect descriptor received by the listener specified a SID for an instance (usually a database instance) that either has not yet dynamically registered with the listener or has not been statically configured for the listener. This may be a temporary condition such as after the listener has started, but before the database instance has registered with the listener.

Action:

• Wait a moment and try to connect a second time.

• Check which instances are currently known by the listener by executing: lsnrctl services <listener name>

• Check that the SID parameter in the connect descriptor specifies an instance known by the listener.

• Check for an event in the listener.log file.

Cara, posta o codigo pra agente ver…assim podemos conversar sobre o assunto