2037
MySQLERRORNotableConnectionHIGH confidence
Got a packet bigger than max_allowed_packet
Production Risk
Medium — INSERT or replication fails for oversized data.
What this means
MySQL received or attempted to send a network packet larger than the max_allowed_packet setting. Large BLOB/TEXT inserts, large result sets, or large binary log events can trigger this.
Why it happens
- 1INSERT of a BLOB or TEXT larger than max_allowed_packet.
- 2Replication binlog event exceeds max_allowed_packet on the replica.
- 3Query result row too large to fit in a single packet.
- 4max_allowed_packet set too low for the workload.
How to reproduce
trigger — this will error
trigger — this will error
INSERT INTO t (blob_col) VALUES (REPEAT('x', 200000000)); -- if max_allowed_packet < 200MBexpected output
ERROR 2037 (08S01): Got a packet bigger than 'max_allowed_packet' bytes.
Fix 1
Increase max_allowed_packet
Increase max_allowed_packet
SET GLOBAL max_allowed_packet = 268435456; -- 256MB
Why this works
A larger limit accommodates bigger data payloads.
Fix 2
Stream large BLOBs in smaller chunks
Stream large BLOBs in smaller chunks
-- Use application-side chunking to split large inserts
Why this works
Chunking avoids large single-packet transfers.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 2037 ER_NET_PACKET_TOO_LARGE
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