Error
Error Code:
1258
MySQL Error 1258: ZLIB Output Buffer Error
Description
Error 1258 indicates that MySQL's internal ZLIB decompression function encountered an issue because the output buffer was not large enough to hold the uncompressed data. This often suggests that the original compressed data might be corrupted or its metadata (like the uncompressed length) is incorrect.
Error Message
ZLIB: Not enough room in the output buffer (probably, length of uncompressed data was corrupted)
Known Causes
4 known causesCorrupted Compressed Data
The compressed data stored in or processed by MySQL has become corrupted, leading to an incorrect reported length for decompression.
Incorrect Data Length Metadata
The metadata specifying the original length of the uncompressed data is inaccurate, causing MySQL to allocate an undersized buffer.
Mismatched Compression Method
Attempting to decompress data that was not originally compressed using ZLIB, or using an incompatible decompression method.
Replication Data Corruption
Compressed data being transferred during replication might become corrupted, resulting in a decompression failure on the replica server.
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