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: //nvb-1.nvb.co.th:1521/dev.nvb.co.th

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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: //nvb-1.nvb.co.th:1521/dev.nvb.co.th

    at oracle.jdbc.driver.DatabaseError.throwSqlException()
  2. Oracle jdbc
    OracleDriver.connect
    1. oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:125)
    2. oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:280)
    3. oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:319)
    4. oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:344)
    5. oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:148)
    6. oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
    7. oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:545)
    7 frames
  3. c3p0:JDBC DataSources/Resource Pools
    ThreadPoolAsynchronousRunner$PoolThread.run
    1. com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:134)
    2. com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182)
    3. com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171)
    4. com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137)
    5. com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014)
    6. com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)
    7. com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810)
    8. com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
    8 frames