Error
Error Code:
1256
MariaDB Error 1256: Uncompressed Data Too Large
Description
MariaDB Error 1256 indicates that the server encountered compressed data that, when uncompressed, would exceed the maximum allowable size. This error often suggests that the metadata specifying the original length of the compressed data might be corrupted or incorrect, leading to an attempt to allocate an impossibly large buffer. It can also occur if the actual uncompressed data genuinely exceeds configured limits.
Error Message
Uncompressed data size too large; the maximum size is %d (probably, length of uncompressed data was corrupted)
Known Causes
4 known causesCorrupted Compressed Data
The metadata defining the original uncompressed size of the data is incorrect or corrupted, causing MariaDB to expect an excessively large output during the uncompression process.
Excessive Uncompressed Data Size
The data, even if not corrupted, genuinely exceeds the configured maximum size that MariaDB is permitted to uncompress in a single operation, hitting an internal or system limit.
Mismatched Compression Method
Data compressed using an external tool or an incompatible method might have metadata that MariaDB misinterprets, leading to an incorrect size calculation during uncompression.
System Resource Constraints
Insufficient server memory or buffer allocations might prevent MariaDB from handling very large uncompression operations, even if the data itself is within theoretical limits.
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