java.sql.SQLException: Listener refused the connection with the following error: ORA-12516, TNS:listener could not find available handler with matching protocol stack The Connection descriptor used by the client was: my_server

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    Oracle Community | 10 years ago | 560599
    java.sql.SQLException: Listener refused the connection with the following error: ORA-12516, TNS:listener could not find available handler with matching protocol stack The Connection descriptor used by the client was: my_server
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Root Cause Analysis

  1. java.sql.SQLException

    Listener refused the connection with the following error: ORA-12516, TNS:listener could not find available handler with matching protocol stack The Connection descriptor used by the client was: my_server

    at oracle.jdbc.driver.DatabaseError.throwSqlException()
  2. Oracle jdbc
    OracleDriver.connect
    1. oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
    2. oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:261)
    3. oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)
    4. oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:414)
    5. oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
    6. oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
    7. oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
    7 frames
  3. Java RT
    DriverManager.getConnection
    1. java.sql.DriverManager.getConnection(DriverManager.java:525)
    2. java.sql.DriverManager.getConnection(DriverManager.java:171)
    2 frames
  4. Unknown
    x.main
    1. x.run(x.java:12)
    2. x.main(x.java:8)
    2 frames