{"record":{"id":"889c8670a627e803","repo":"alibaba/canal","slug":"fixed-timestamp-can-t-found-begin-commit-positio","errorCode":null,"errorMessage":"[fixed timestamp] can't found begin/commit position before with fixed position  + fixedPosition.getJournalName() + : + fixedPosition.getPosition()","messagePattern":"\\[fixed timestamp\\] can't found begin/commit position before with fixed position  \\+ fixedPosition\\.getJournalName\\(\\) \\+ : \\+ fixedPosition\\.getPosition\\(\\)","errorType":"exception","errorClass":"CanalParseException","httpStatus":null,"severity":"error","filePath":"parse/src/main/java/com/alibaba/otter/canal/parse/inbound/mysql/MysqlEventParser.java","lineNumber":403,"sourceCode":"                endPosition.getJournalName(),\n                true);\n        } else {\n            return endPosition;\n        }\n    }\n\n    protected EntryPosition findPositionWithMasterIdAndTimestamp(MysqlConnection connection, EntryPosition fixedPosition) {\n        MysqlConnection mysqlConnection = (MysqlConnection) connection;\n        if (tableMetaTSDB != null && (fixedPosition.getTimestamp() == null || fixedPosition.getTimestamp() <= 0)) {\n            // 使用一个未来极大的时间，基于位点进行定位\n            long startTimestamp = System.currentTimeMillis() + 102L * 365 * 24 * 3600 * 1000; // 当前时间的未来102年\n            EntryPosition entryPosition = findAsPerTimestampInSpecificLogFile(mysqlConnection,\n                startTimestamp,\n                fixedPosition,\n                fixedPosition.getJournalName(),\n                true);\n            if (entryPosition == null) {\n                throw new CanalParseException(\"[fixed timestamp] can't found begin/commit position before with fixed position \"\n                                              + fixedPosition.getJournalName() + \":\" + fixedPosition.getPosition());\n            }\n            return entryPosition;\n        } else {\n            return fixedPosition;\n        }\n    }\n\n    protected EntryPosition findStartPositionInternal(ErosaConnection connection) {\n        MysqlConnection mysqlConnection = (MysqlConnection) connection;\n        LogPosition logPosition = logPositionManager.getLatestIndexBy(destination);\n        if (logPosition == null) {// 找不到历史成功记录\n            EntryPosition entryPosition = null;\n            if (masterInfo != null && mysqlConnection.getConnector().getAddress().equals(masterInfo.getAddress())) {\n                entryPosition = masterPosition;\n            } else if (standbyInfo != null\n                       && mysqlConnection.getConnector().getAddress().equals(standbyInfo.getAddress())) {\n                entryPosition = standbyPosition;","sourceCodeStart":385,"sourceCodeEnd":421,"githubUrl":"https://github.com/alibaba/canal/blob/87be50e87686a3e8af08c368d0e1ffd1f59eb04a/parse/src/main/java/com/alibaba/otter/canal/parse/inbound/mysql/MysqlEventParser.java#L385-L421","documentation":"findPositionWithMasterIdAndTimestamp() uses a far-future timestamp (now + 102 years) to locate the last begin/commit transaction boundary at or before a fixed position when tableMetaTSDB is enabled and the fixed position lacks a timestamp. If findAsPerTimestampInSpecificLogFile returns null (no transaction boundary found in the binlog), Canal throws CanalParseException — it cannot safely resume without a valid transaction anchor.","triggerScenarios":"tableMetaTSDB is enabled, the configured fixed binlog position has no/zero timestamp, and scanning the target binlog file for a begin/commit event before that position yields nothing.","commonSituations":"The binlog file named in the fixed position no longer exists or has been purged; the position points past the end of available events; the binlog contains no transaction events in the scanned range; TSDB snapshot/meta inconsistency.","solutions":["Provide a timestamp on the fixed entry position (canal.instance.master.timestamp) so the far-future scan is bypassed.","Verify the configured journalName/position still exists on the master (SHOW BINARY LOGS); if purged, reset to a current valid position.","If tableMetaTSDB is not required, disabling it avoids this code path.","Use GTID-based positioning to avoid relying on filename/offset/timestamp matching."],"exampleFix":"# before: position without timestamp triggers future-102y scan\ncanal.instance.master.position=mysql-bin.000010:12345\n# after: include a timestamp so the scan is skipped\ncanal.instance.master.position=mysql-bin.000010:12345\ncanal.instance.master.timestamp=1690000000000","handlingStrategy":"validation","validationCode":"// Ensure the fixed position has a timestamp or the binlog still exists\nif (tableMetaTSDB != null && (fixedPosition.getTimestamp() == null || fixedPosition.getTimestamp() <= 0)) {\n    if (!binlogExistsOnMaster(connection, fixedPosition.getJournalName())) {\n        throw new IllegalStateException(\"Fixed binlog \" + fixedPosition.getJournalName() + \" not found on master; reset position.\");\n    }\n}","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Always pair a fixed binlog position with a timestamp.","Verify SHOW BINARY LOGS includes your configured journalName before start.","Use GTID mode to avoid filename/offset/timestamp fragility."],"tags":["mysql","binlog","position","tsdb","canal-parse"],"backgroundTag":null,"analyzedSha":"87be50e87686a3e8af08c368d0e1ffd1f59eb04a","analyzedAt":"2026-08-14T04:30:11.918Z","schemaVersion":2},"datasetVersion":"2026-08-14T05:17:29.042Z"}