java.sql.SQLException: Erreur lors de l'allocation d'une connexion. Cause : Connection could not be allocated because: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. Error Code: 0

Oracle Community | Olivier Chorier Guest | 4 years ago
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    Oracle Community | 4 years ago | Olivier Chorier Guest
    java.sql.SQLException: Erreur lors de l'allocation d'une connexion. Cause : Connection could not be allocated because: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. Error Code: 0
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    Stack Overflow | 3 years ago | user3557759
    java.sql.SQLException: Error in allocating a connection. Cause: Connection could not be allocated because: java.net.ConnectException : Error connecting to server localhost on port 1527 with message Connection refused: connect. Error Code: 0
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    Oracle Community | 3 years ago | nye'e
    java.sql.SQLException: Error in allocating a connection. Cause: Connection could not be allocated because: java.net.ConnectException : Error connecting to server localhost on port 1527 with message Connection refused: connect. Error Code: 0
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    JDBC Pool unavailable induce failed deployment

    Oracle Community | 4 years ago | Olivier Chorier Guest
    java.sql.SQLException: Erreur lors de l'allocation d'une connexion. Cause : Connection could not be allocated because: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
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    How do I resolve this communication link failure?

    Stack Overflow | 2 years ago | user4789552
    java.sql.SQLException: Connection could not be allocated because: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. Error Code: 0

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    Root Cause Analysis

    1. java.sql.SQLException

      Erreur lors de l'allocation d'une connexion. Cause : Connection could not be allocated because: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. Error Code: 0

      at org.eclipse.persistence.exceptions.DatabaseException.sqlException()
    2. EclipseLink (non-OSGi)
      JNDIConnector.connect
      1. org.eclipse.persistence.exceptions.DatabaseException.sqlException(DatabaseException.java:309)
      2. org.eclipse.persistence.sessions.JNDIConnector.connect(JNDIConnector.java:135)
      2 frames