为什么我在连接到 Oracle 时收到“格式错误：属性是 'v$session.program'”？答案

【问题标题】：Why am I getting "format error: Property is 'v$session.program'" connecting to Oracle?为什么我在连接到 Oracle 时收到“格式错误：属性是 'v$session.program'”？
【发布时间】：2016-01-28 21:12:20
【问题描述】：

我正在从 Java 应用程序连接到 Oracle 11g 数据库。我收到以下异常：

Caused by: java.sql.SQLException: Connection property: format error: Property is 'v$session.program' and value is '<My Maven application's name>'
at oracle.jdbc.driver.T4CConnection.validateConnectionProperties(T4CConnection.java:4540)
at oracle.jdbc.driver.PhysicalConnection.readConnectionProperties(PhysicalConnection.java:2345)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:517)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:228)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:521)
at oracle.jdbc.pool.OracleDataSource.getPhysicalConnection(OracleDataSource.java:280)
at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:207)
at oracle.ucp.jdbc.DataSourceConnectionFactoryAdapter.createConnection(DataSourceConnectionFactoryAdapter.java:100)

我该如何解决这个问题？

【问题讨论】：

你的连接字符串是什么（当然不包括密码）？

标签： java oracle maven oracle11g

【解决方案1】：

我们想通了。我们的应用程序名称有一个字符太长：它是 49 字符，而不是 48 或更少。

这是v$session 属性及其长度限制的列表：

v$session.machine：64
v$session.iname：不限
v$session.ename：不限
v$session.process: 24
v$session.program：48
v$session.terminal: 30
v$session.osuer：30

此外，没有一个属性可以匹配这个正则表达式：.*[\00].*，我认为这意味着没有括号。

如果您遇到错误并想查看代码，只需在您的 IDE 中为 SQLException 添加一个异常断点。你最终应该进入一个名为 T4CConnection.class 的类。

这是该方法的反编译代码validateConnectionProperties()：

void validateConnectionProperties() throws SQLException {
    super.validateConnectionProperties();
    String var1 = ".*[\\00\\(\\)].*";
    SQLException var2;
    if(this.thinVsessionOsuser == null || !this.thinVsessionOsuser.matches(var1) && this.thinVsessionOsuser.length() <= 30) {
        if(this.thinVsessionTerminal == null || !this.thinVsessionTerminal.matches(var1) && this.thinVsessionTerminal.length() <= 30) {
            if(this.thinVsessionMachine != null && (this.thinVsessionMachine.matches(var1) || this.thinVsessionMachine.length() > 64)) {
                var2 = DatabaseError.createSqlException((OracleConnection)null, 190, "Property is \'v$session.machine\' and value is \'" + this.thinVsessionMachine + "\'");
                var2.fillInStackTrace();
                throw var2;
            } else if(this.thinVsessionProgram == null || !this.thinVsessionProgram.matches(var1) && this.thinVsessionProgram.length() <= 48) {
                if(this.thinVsessionProcess == null || !this.thinVsessionProcess.matches(var1) && this.thinVsessionProcess.length() <= 24) {
                    if(this.thinVsessionIname != null && this.thinVsessionIname.matches(var1)) {
                        var2 = DatabaseError.createSqlException((OracleConnection)null, 190, "Property is \'v$session.iname\' and value is \'" + this.thinVsessionIname + "\'");
                        var2.fillInStackTrace();
                        throw var2;
                    } else if(this.thinVsessionEname != null && this.thinVsessionEname.matches(var1)) {
                        var2 = DatabaseError.createSqlException((OracleConnection)null, 190, "Property is \'v$session.ename\' and value is \'" + this.thinVsessionEname + "\'");
                        var2.fillInStackTrace();
                        throw var2;
                    }
                } else {
                    var2 = DatabaseError.createSqlException((OracleConnection)null, 190, "Property is \'v$session.process\' and value is \'" + this.thinVsessionProcess + "\'");
                    var2.fillInStackTrace();
                    throw var2;
                }
            } else {
                var2 = DatabaseError.createSqlException((OracleConnection)null, 190, "Property is \'v$session.program\' and value is \'" + this.thinVsessionProgram + "\'");
                var2.fillInStackTrace();
                throw var2;
            }
        } else {
            var2 = DatabaseError.createSqlException((OracleConnection)null, 190, "Property is \'v$session.terminal\' and value is \'" + this.thinVsessionTerminal + "\'");
            var2.fillInStackTrace();
            throw var2;
        }
    } else {
        var2 = DatabaseError.createSqlException((OracleConnection)null, 190, "Property is \'v$session.osuser\' and value is \'" + this.thinVsessionOsuser + "\'");
        var2.fillInStackTrace();
        throw var2;
    }
}

【讨论】：