Error
Error Code:
4140
MySQL Error 4140: CSV Column Buffer Overflow
Description
Error 4140, 'CSV column too big for leftover buffer', occurs during the bulk loading of data, especially when importing CSV files. It signifies that the data within a single column in your CSV file exceeds the temporary buffer size MySQL allocates for processing that specific column during the import operation.
Error Message
CSV column too big for leftover buffer.
Known Causes
3 known causesExcessively Long Column Data
A specific column in the CSV file contains data (e.g., a very long string, large text, or binary data) that exceeds the internal buffer allocated by MySQL for processing individual fields.
Insufficient MySQL Buffer Configuration
The MySQL server's configuration, particularly parameters like `bulk_insert_buffer_size` or `max_allowed_packet`, may be set too low to accommodate large column values during bulk loading.
Malformed CSV Structure
Errors in the CSV file's structure, such as incorrect delimiters, unescaped special characters, or missing quotes, can cause the parser to misinterpret a large block of data as a single, oversized column.
Solutions
Coming SoonDetailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:
General Troubleshooting Tips
- Check the error message carefully for specific details
- Review recent changes that might have caused the error
- Search for the exact error code in the official documentation
- Check log files for additional context
- Try restarting the application or service