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

51cto.com | 7 months ago
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    java.sql.SQLException: Io exception: The Network Adapter could not establish the connection
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    getting exception: The Network Adapter could not establish the connection in simple jdbc program

    Stack Overflow | 5 years ago
    java.sql.SQLException: Io exception: The Network Adapter could not establish the connection

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Root Cause Analysis

  1. java.sql.SQLException

    Io exception: The Network Adapter could not establish the connection

    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:146)
    3. oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:255)
    4. oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)
    5. oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:414)
    6. oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
    7. oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
    8. oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
    8 frames
  3. druid
    DruidDataSource$CreateConnectionThread.run
    1. com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1353)
    2. com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1409)
    3. com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:1649)
    3 frames