EC
2037
MariaDBERRORNotableConnectionHIGH 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
  1. 1INSERT of a BLOB or TEXT larger than max_allowed_packet.
  2. 2Replication binlog event exceeds max_allowed_packet on the replica.
  3. 3Query result row too large to fit in a single packet.
  4. 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 < 200MB

expected 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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