{"record":{"id":"e798b9680677a559","repo":"apache/seatunnel","slug":"error-while-deserializing-binlog-event-at-offset","errorCode":null,"errorMessage":"Error while deserializing binlog event at offset {}.{}This exception will be ignored and the event be skipped.{}Use the mysqlbinlog tool to view the problematic event: mysqlbinlog --start-position={} --stop-position={} --verbose {}","messagePattern":"Error while deserializing binlog event at offset (.+?)\\.(.+?)This exception will be ignored and the event be skipped\\.(.+?)Use the mysqlbinlog tool to view the problematic event: mysqlbinlog --start-position=(.+?) --stop-position=(.+?) --verbose (.+?)","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"seatunnel-connectors-v2/connector-cdc/connector-cdc-mysql/src/main/java/io/debezium/connector/mysql/MySqlStreamingChangeEventSource.java","lineNumber":525,"sourceCode":"                                    .getEventHeader(); // safe cast, instantiated that ourselves\n\n            // logging some additional context but not the exception itself, this will happen in\n            // handleEvent()\n            if (eventDeserializationFailureHandlingMode\n                    == EventProcessingFailureHandlingMode.FAIL) {\n                LOGGER.error(\n                        \"Error while deserializing binlog event at offset {}.{}\"\n                                + \"Use the mysqlbinlog tool to view the problematic event: mysqlbinlog --start-position={} --stop-position={} --verbose {}\",\n                        offsetContext.getOffset(),\n                        System.lineSeparator(),\n                        eventHeader.getPosition(),\n                        eventHeader.getNextPosition(),\n                        offsetContext.getSource().binlogFilename());\n\n                throw new RuntimeException(data.getCause());\n            } else if (eventDeserializationFailureHandlingMode\n                    == EventProcessingFailureHandlingMode.WARN) {\n                LOGGER.warn(\n                        \"Error while deserializing binlog event at offset {}.{}\"\n                                + \"This exception will be ignored and the event be skipped.{}\"\n                                + \"Use the mysqlbinlog tool to view the problematic event: mysqlbinlog --start-position={} --stop-position={} --verbose {}\",\n                        offsetContext.getOffset(),\n                        System.lineSeparator(),\n                        System.lineSeparator(),\n                        eventHeader.getPosition(),\n                        eventHeader.getNextPosition(),\n                        offsetContext.getSource().binlogFilename(),\n                        data.getCause());\n            }\n        } else {\n            LOGGER.error(\"Server incident: {}\", event);\n        }\n    }\n\n    /**\n     * Handle the supplied event with a {@link RotateEventData} that signals the logs are being","sourceCodeStart":507,"sourceCodeEnd":543,"githubUrl":"https://github.com/apache/seatunnel/blob/cf67b549a7a6c35fa0beb12d83c62892427ea919/seatunnel-connectors-v2/connector-cdc/connector-cdc-mysql/src/main/java/io/debezium/connector/mysql/MySqlStreamingChangeEventSource.java#L507-L543","documentation":"The MySQL binlog client failed to deserialize a binlog event at a given offset. With event.deserialization.failure.handling.mode=warn, the connector logs this warning including the binlog file/position, skips the event, and continues streaming rather than failing the connector.","triggerScenarios":"handleServerIncident in execute() receives an EventDeserializer.DeserializationException while EventDeserializationFailureHandlingMode is WARN; the raw binlog bytes for the event could not be parsed (truncated/corrupt binlog, unknown event type from a newer MySQL, or mid-event restart).","commonSituations":"Server crash or unclean shutdown left a partially written binlog event; replicating from a MySQL version whose new event types the bundled Debezium can't parse; binlog file rotated/truncated externally; reading binlogs copied with checksums mismatched.","solutions":["Inspect the problematic event with: mysqlbinlog --start-position=<pos> --stop-position=<pos> --verbose <binlog-file> and assess data loss","Verify binlog integrity on the server (SHOW BINARY LOGS; mysqlbinlog --verify-binlog-checksum) and if corrupt, restart streaming from a clean earlier position/GTID","Upgrade the Debezium/connector version so it supports the source MySQL's event format","If losing events is unacceptable, set event.deserialization.failure.handling.mode=fail so the connector stops instead of silently skipping"],"exampleFix":"// before\n\"event.deserialization.failure.handling.mode\": \"warn\"\n// after\n\"event.deserialization.failure.handling.mode\": \"fail\"","handlingStrategy":"try-catch","validationCode":"// Pre-checks before streaming:\n// SHOW VARIABLES LIKE 'binlog_format'; -- must be ROW\n// SHOW VARIABLES LIKE 'binlog_checksum'; -- match connector expectation\n// SELECT @@version; -- ensure connector supports this MySQL version","typeGuard":null,"tryCatchPattern":"// In the pipeline around the CDC consumer:\ntry {\n    processChangeEvents(stream);\n} catch (DebeziumException | RuntimeException e) {\n    if (isBinlogDeserializationIssue(e)) {\n        logBinlogPositionAndDecideSkipOrFail(e); // inspect with mysqlbinlog\n    } else {\n        throw e;\n    }\n}","preventionTips":["Set event.deserialization.failure.handling.mode=fail when data loss is unacceptable","Keep the connector's Debezium version compatible with the MySQL server version","Enable binlog row image FULL (binlog_row_image=FULL)","Increase binlog_expire_logs_seconds so positions stay valid"],"tags":["mysql","cdc","binlog","deserialization"],"backgroundTag":"json-unmarshal-failed","analyzedSha":"cf67b549a7a6c35fa0beb12d83c62892427ea919","analyzedAt":"2026-09-10T21:44:55.265Z","contentChangedAt":"2026-09-10T21:44:55.265Z","schemaVersion":2},"datasetVersion":"2026-09-14T11:17:12.474Z"}