<p>The session variable @@SESSION.GTID_NEXT cannot be set to ANONYMOUS while global GTID_MODE is ON.</p>
<p>MySQL Error 1782: ER_CANT_SET_GTID_NEXT_TO_ANONYMOUS_WHEN_GTID_MODE_IS_ON occurs when you try to set @@SESSION.GTID_NEXT = 'ANONYMOUS' while @@GLOBAL.GTID_MODE = ON. Switch GTID_NEXT to AUTOMATIC or disable GTID_MODE to resolve the issue.</p>
@@SESSION.GTID_NEXT cannot be set to ANONYMOUS when
Error 1782 (SQLSTATE HY000) is raised when a client issues SET @@SESSION.GTID_NEXT = 'ANONYMOUS' while the server is running with @@GLOBAL.GTID_MODE = ON. In GTID mode every transaction must carry a valid Global Transaction Identifier, so anonymous transactions are disallowed.
The error protects replication consistency by preventing non-GTID transactions from entering a GTID-enabled system. Fixing it quickly keeps primary and replica servers in sync.
The error surfaces during manual replication maintenance, point-in-time recovery scripts, bulk imports, or any session that explicitly manipulates GTID_NEXT. It can also show up in legacy applications upgraded to MySQL 8 that still set GTID_NEXT to ANONYMOUS.
Ignoring the error blocks the current transaction, breaks automation scripts, and can leave replicas waiting for missing GTIDs. Correcting the setting ensures seamless replication and reliable failover.
MySQL raises error 1782 whenever a session requests an anonymous transaction while GTID enforcement is active. The conflict arises because GTID_MODE = ON mandates AUTOMATIC or explicit GTID values.
Set @@SESSION.GTID_NEXT to AUTOMATIC before executing the transaction, or turn GTID_MODE to OFF_PERMISSIVE/OFF if you truly need anonymous transactions. Restart scripts after applying the change to confirm the fix.
In interactive sessions, simply run SET @@SESSION.GTID_NEXT = 'AUTOMATIC'. In recovery scripts, replace every occurrence of ANONYMOUS with AUTOMATIC. For migration jobs, disable GTID mode temporarily, run the script, then re-enable GTIDs.
Keep application code from toggling GTID_NEXT directly. Use logical backups created with --set-gtid-purged=ON. Validate dump files for stray SET GTID_NEXT = ANONYMOUS statements before loading.
Errors 1781 and 1789 also involve GTID_NEXT misuse. They are addressed with similar techniques: ensure GTID_NEXT is AUTOMATIC and GTID consistency checks are satisfied.
DBAs sometimes paste SET @@SESSION.GTID_NEXT = 'ANONYMOUS' to replay legacy dumps, triggering error 1782 in GTID mode.
Backups taken before enabling GTID contain ANONYMOUS entries and will fail when restored on a GTID-enabled server.
ETL or migration utilities that set GTID_NEXT explicitly without checking server mode run into this error.
Hand-written recovery scripts may switch GTID_NEXT to ANONYMOUS to mimic classic replication, causing conflicts on modern servers.
Occurs when GTID_NEXT is set to a UUID but GTID_MODE is OFF. Enable GTID_MODE or switch GTID_NEXT to ANONYMOUS/AUTOMATIC.
Triggered by CREATE TABLE ... SELECT in GTID mode when binlog_format is STATEMENT. Use ROW format or split the operation.
Raised during CHANGE MASTER TO when the provided GTID position is not in the master's binary logs. Verify GTID_EXECUTED on both servers.
No. MySQL blocks anonymous transactions when GTID_MODE = ON to guarantee deterministic replication. Use AUTOMATIC or disable GTID mode first.
Switching GTID_MODE requires full cluster coordination. Set it to OFF_PERMISSIVE, wait for replicas to sync, then OFF. Plan downtime or maintenance windows.
The dump file likely contains SET @@SESSION.GTID_NEXT = 'ANONYMOUS'. Remove those lines or use mysqldump with --set-gtid-purged=ON to regenerate.
Galaxy's schema-aware linting warns when scripts attempt prohibited GTID_NEXT assignments and auto-corrects them to AUTOMATIC, reducing production incidents.
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