nested exception is org.apache.http.NoHttpResponseException

这个异常通常是由于网络连接问题引起的。它意味着无法从服务器接收到响应，可能是因为连接已断开或服务器没有正确响应等原因。你可以尝试以下几种解决方法：

1. 检查网络连接是否正常，确保能够连接到服务器。
2. 尝试重新连接服务器。
3. 增加连接超时时间和读取超时时间。
4. 重启服务器，或者检查服务器是否出现了故障。

如果以上方法仍然无法解决问题，你可以考虑使用其他的网络通信方式，或者联系服务器管理员寻求帮助。

相关问题

nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.

nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:
Error querying database. Cause: org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement 'com.example.mapper.UserMapper.getUserById'. It's likely that neither a Result Type nor a Result Map was specified.
Cause: org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement 'com.example.mapper.UserMapper.getUserById'. It's likely that neither a Result Type nor a Result Map was specified.

This exception is thrown when there is an issue with executing a query using MyBatis framework. In this case, the nested exception is org.apache.ibatis.exceptions.PersistenceException, which indicates that there was an error querying the database.

The specific error message states that no Result Maps were found for the Mapped Statement 'com.example.mapper.UserMapper.getUserById'. This means that either a Result Type or a Result Map was not specified for the query.

To resolve this issue, you need to make sure that the appropriate Result Type or Result Map is specified for the query in the MyBatis mapping file (XML) or in the annotation-based configuration.

nested exception is org.apache

.nestedSQLException: Cannot create PoolableConnectionFactory (ORA-28040: No matching authentication protocol)

这是MyBatis在连接Oracle数据库时出现的异常。原因是Oracle数据库的身份验证协议不匹配，需要更新数据库的身份验证协议。可以尝试更新Oracle数据库的版本或者升级JDBC驱动程序来解决这个问题。