<p>MySQL raises this error when a GTID set string is syntactically invalid or incomplete.</p>
<p>MySQL Error 1772: ER_MALFORMED_GTID_SET_SPECIFICATION appears when the server parses a malformed GTID set such as in CHANGE MASTER TO or SET GLOBAL gtid_purged. Validate the GTID format (UUID:intervals) or rebuild it with mysqlbinlog to resolve the issue.</p>
Malformed GTID set specification '%s'.
The server throws MySQL Error 1772 when it fails to parse a Global Transaction Identifier (GTID) set string supplied in a replication or administrative statement.
MySQL expects each GTID set element to follow the exact format UUID:intervals. Any deviation triggers the malformed GTID set specification error.
The error blocks the statement from running, preventing potentially unsafe replication actions. Fixing it quickly restores normal replication workflows.
The error commonly surfaces during CHANGE MASTER TO, RESET MASTER, SET GLOBAL gtid_purged, or mysqlbinlog --set-gtid-purged commands when the supplied GTID set string has bad syntax.
It can also appear while importing dump files that contain invalid GTID_PURGED or GTID_NEXT directives.
A malformed GTID set halts replication configuration, prevents point-in-time recovery, and can leave primary and replica servers out of sync.
Immediate correction ensures transactional consistency, keeps replicas healthy, and avoids data-loss scenarios.
Typographical errors, missing UUID sections, reversed interval bounds, or whitespace inside the GTID set are leading triggers.
Incorrect scripting or copying GTID strings between clusters of different UUIDs also generates malformed sets.
First, locate the failing GTID set string in your statement or dump file. Validate that every element matches UUID:low-high or UUID:number.
Recreate the correct GTID set with SHOW MASTER STATUS or mysqlbinlog --include-gtids=... on a healthy server, then retry the statement.
If CHANGE MASTER TO fails, fetch the replica_source_UUID from the source and rebuild the GTID set before retrying.
When an import dump fails, open the dump, correct or comment out the SET @@GLOBAL.gtid_purged line, and run SET GLOBAL gtid_purged separately with the right value.
Always copy GTID values directly from SHOW commands, never from manual notes.
Use scripts that automatically pull valid UUIDs, and store dumps in Galaxy so teammates share the same, verified GTID strings.
Error 1236: Malformed packet - often appears with corrupt binlogs. Fix by checking file integrity.
Error 1790: GTID_PURGED can only be set when GTID_EXECUTED is empty - resolve by resetting slave or purging logs first.
A single missing or extra character in the 32-hex-digit UUID breaks parsing.
Using UUID:high-low or forgetting the colon delimiter invalidates the element.
Spaces or line breaks inside the GTID set are not allowed.
Combining GTIDs from different clusters with distinct server_uuid values triggers the error.
Partial GTID sets copied from logs or dashboards end abruptly, failing validation.
Occurs when GTID_PURGED conflicts with GTID_EXECUTED. Clear or reset before setting.
Indicates missing binlog files needed for replication after a malformed GTID issue.
Points to binlog corruption or network issues interfering with GTID replication.
Copy the string into SELECT GTID_SUBSET or GTID_SUBTRACT; if MySQL returns NULL, the set is invalid.
Ignoring breaks replication consistency. Always correct the GTID set before proceeding.
Yes. Galaxy’s editor validates SQL and highlights malformed literals, reducing GTID mistakes during script sharing.
All GA versions from 5.6.5 onward that support GTIDs enforce strict GTID set parsing and can raise this error.
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