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Description

This error indicates an attempt to manually set the `@@SESSION.GTID_NEXT` variable to a Global Transaction Identifier (GTID) value (UUID:NUMBER) when the global GTID mode (`@@GLOBAL.GTID_MODE`) is currently disabled. GTID_NEXT is crucial for GTID-based replication and requires GTIDs to be active on the server. This typically happens during replication setup or specific data loading scenarios.

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Error Message

@@SESSION.GTID_NEXT cannot be set to UUID:NUMBER when @@GLOBAL.GTID_MODE = OFF.

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Known Causes

3 known causes

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Attempting GTID Operations on Disabled Server

The server's global GTID mode (`@@GLOBAL.GTID_MODE`) is set to `OFF`, but an operation, typically related to replication or data loading, tries to set `@@SESSION.GTID_NEXT`.

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Manual Session GTID Assignment

A user or application manually executes a `SET @@SESSION.GTID_NEXT = 'UUID:NUMBER'` statement without verifying that the server's GTID mode is enabled.

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Executing GTID-Aware Scripts on Non-GTID Server

A SQL script or application designed to work with GTID-based replication or data import (e.g., using `SET GTID_NEXT` for specific transactions) is run on a server where GTIDs are globally disabled.

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Solutions

3 solutions available

1. Temporarily Enable GTID for Session easy

Enable GTID for the current session to allow setting GTID_NEXT.

1

Connect to your MySQL server using a client that allows session variable setting.

2

Set the `GTID_MODE` to `ON` for the current session. This is a temporary change and will not affect the global setting.

SET SESSION GTID_MODE = ON;

3

Now, you can set the `GTID_NEXT` variable for the session. Replace `UUID:NUMBER` with the actual GTID you intend to set.

SET SESSION GTID_NEXT = 'your_uuid:your_number';

4

Proceed with your operation that requires setting `GTID_NEXT`.

5

Once done, you can optionally reset the session `GTID_MODE` to `OFF` if that was its previous state, although it's not strictly necessary as it's session-specific.

SET SESSION GTID_MODE = OFF;

2. Globally Enable GTID Mode medium

Permanently enable GTID mode for the entire MySQL instance.

1

Log in to your MySQL server as a user with `SUPER` or `SYSTEM_VARIABLES_ADMIN` privileges.

2

Check the current global `GTID_MODE` setting.

SHOW GLOBAL VARIABLES LIKE 'gtid_mode';

3

If `gtid_mode` is `OFF`, you need to change it. This requires a server restart if the change is made directly in the configuration file. For a dynamic change that persists after restart, modify the configuration file.

4

Edit your MySQL configuration file (e.g., `my.cnf` or `my.ini`). Locate the `[mysqld]` section and add or modify the `gtid_mode` setting to `ON`.

[mysqld]
gtid_mode = ON
enforce_gtid_consistency = ON

5

Save the configuration file and restart your MySQL server.

6

After the server restarts, verify that `GTID_MODE` is `ON` globally.

SHOW GLOBAL VARIABLES LIKE 'gtid_mode';

7

Now you can set `GTID_NEXT` at the session level without encountering the error.

SET SESSION GTID_NEXT = 'your_uuid:your_number';

3. Disable GTID_NEXT Setting easy

Avoid setting GTID_NEXT if GTID_MODE is OFF and not explicitly required.

1

Review the operation or script that is attempting to set `@@SESSION.GTID_NEXT`.

2

Determine if setting `GTID_NEXT` is truly necessary for the intended operation in an environment where `GTID_MODE` is `OFF`.

3

If `GTID_NEXT` is not essential for your operation when `GTID_MODE` is `OFF`, remove or comment out the line that sets `@@SESSION.GTID_NEXT`.

/* SET SESSION GTID_NEXT = 'your_uuid:your_number'; */

4

Re-run your operation without attempting to set `GTID_NEXT`.

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Related Errors

5 related errors

MySQL Error 1781: GTID_NEXT with GTID_MODE Off