Common Errors
If auto-reconnect is not enabled when connecting to the database, the C++ API will raise
exceptions such as dolphindb::IOException or
dolphindb::RuntimeException when network issues or other exceptions
occur. In your C++ application, it is crucial to handle these exceptions by implementing
proper exception catching mechanisms. Failure to do so may result in an unintended
process termination.
Below lists some frequently encountered I/O errors.
| Error Code | Error Message |
|---|---|
| IO Error 1 | Socket is disconnected/closed or file is closed. |
| IO Error 2 | In non-blocking socket mode, there is no data ready for retrieval yet. |
| IO Error 3 | Out of memory, no disk space, or no buffer for sending data in non-blocking socket mode. |
| IO Error 4 | String size exceeds 64K or code size exceeds 1 MB during serialization over network. |
| IO Error 5 | In non-blocking socket mode, a program is in pending connection mode. |
| IO Error 6 | Invalid message format. |
| IO Error 7 | Reach the end of a file or a buffer. |
| IO Error 13 | Unknown IO error. |