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High severityresource

Power BI Refresh Error:
1153

What does this error mean?

The client sent or MySQL needs to send a data packet that exceeds the max_allowed_packet size limit.

Common causes

  • 1Inserting a BLOB or LONGTEXT value larger than the current max_allowed_packet setting
  • 2ADF copy activity sends large batches in a single packet
  • 3mysqldump import of a large dump file with rows exceeding the packet limit
  • 4Replication fails when the master sends a binlog event larger than the slave's max_allowed_packet

How to fix it

  1. 1Step 1: Check the current limit: `SHOW VARIABLES LIKE 'max_allowed_packet';`
  2. 2Step 2: Increase it globally: `SET GLOBAL max_allowed_packet=268435456;` (256MB).
  3. 3Step 3: Also set it in my.cnf for persistence: add `max_allowed_packet=256M` under `[mysqld]` and `[client]`.
  4. 4Step 4: Restart MySQL for the my.cnf change to take effect: `sudo systemctl restart mysql`.

Frequently asked questions

What is the maximum value for max_allowed_packet in MySQL?

The maximum is 1073741824 bytes (1GB). The default in MySQL 8.0 is 67108864 bytes (64MB). Set it to the minimum value required by your largest data rows.

Do I need to restart MySQL to change max_allowed_packet?

`SET GLOBAL max_allowed_packet=N` takes effect for new connections without a restart. Changes in my.cnf require a restart to persist across server reboots.

Can MetricSign detect when this error causes a pipeline failure?

Yes — MetricSign captures ADF pipeline failures and surfaces the MySQL error code, alerting your team when packet size issues start blocking data loads.

Official documentation: https://dev.mysql.com/doc/mysql-errors/8.0/en/server-error-reference.html

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