java.sql.SQLException: The Network Adapter could not establish the connection

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Root Cause Analysis

  1. java.net.ConnectException

    Connection refused: connect

    at java.net.PlainSocketImpl.socketConnect()
  2. Java RT
    Socket.connect
    1. java.net.PlainSocketImpl.socketConnect(Native Method)
    2. java.net.PlainSocketImpl.doConnect(Unknown Source)
    3. java.net.PlainSocketImpl.connectToAddress(Unknown Source)
    4. java.net.PlainSocketImpl.connect(Unknown Source)
    5. java.net.SocksSocketImpl.connect(Unknown Source)
    6. java.net.Socket.connect(Unknown Source)
    6 frames
  3. Oracle jdbc
    OracleDriver.connect
    1. oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:141)
    2. oracle.net.nt.ConnOption.connect(ConnOption.java:123)
    3. oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:337)
    4. oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:422)
    5. oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:672)
    6. oracle.net.ns.NSProtocol.connect(NSProtocol.java:237)
    7. oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1042)
    8. oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:301)
    9. oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:531)
    10. oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:221)
    11. oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
    12. oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:503)
    12 frames
  4. Java RT
    DriverManager.getConnection
    1. java.sql.DriverManager.getConnection(Unknown Source)
    2. java.sql.DriverManager.getConnection(Unknown Source)
    2 frames
  5. com.wipro.sample
    min.main
    1. com.wipro.sample.min.main(min.java:28)
    1 frame