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在从池中获取连接时，我在 Spring Batch Unit 运行之一中遇到异常。我已经通过更改池的属性进行了诊断并尝试过，但仅在一项特定测试中仍然出现相同的错误。所有其他测试都运行良好。

连接池属性：

dataSource.maxPoolSize=5
dataSource.maxConnectionReuseTime.sec=45
dataSource.inactiveConnectionTimeout.sec=45
dataSource.minPoolSize=0
dataSource.initialPoolSize=1

获取连接代码：

private IDatabaseConnection getConnection( Connection con ) throws Exception {
    // get connection

    // oracle schema name is the user name
    String schemaOwner = new JdbcTemplate( dataSource ).queryForObject( "select sys_context( 'userenv', 'current_schema' ) from dual", String.class );
    IDatabaseConnection connection = new DatabaseConnection(con, schemaOwner.toUpperCase(Locale.ENGLISH));
    DatabaseConfig config = connection.getConfig();
    config.setProperty(DatabaseConfig.PROPERTY_DATATYPE_FACTORY, new Oracle10DataTypeFactory());
    config.setProperty(DatabaseConfig.PROPERTY_TABLE_TYPE, new String[] {"TABLE", "VIEW","ALIAS", "SYNONYM"});
    return connection;
}

protected void setUp() throws Exception {
    Connection con = DataSourceUtils.getConnection( dataSource );
    IDatabaseConnection iDatabaseConnection = getConnection( con );
    DatabaseOperation.CLEAN_INSERT.execute(iDatabaseConnection, getDataSet());
    DataSourceUtils.releaseConnection( con, dataSource );
}

异常消息：

org.springframework.jdbc.CannotGetJdbcConnectionException：无法获得 JDBC 连接；嵌套异常是 java.sql.SQLException：获取连接时发生异常：oracle.ucp.UniversalConnectionPoolException：生命周期状态无效。检查通用连接池的状态

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