alibaba/canal · error · CanalParseException

[fixed timestamp] can't found begin/commit position before w

Error message

[fixed timestamp] can't found begin/commit position before with fixed position  + fixedPosition.getJournalName() + : + fixedPosition.getPosition()

What it means

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.

Source

Thrown at parse/src/main/java/com/alibaba/otter/canal/parse/inbound/mysql/MysqlEventParser.java:403

                endPosition.getJournalName(),
                true);
        } else {
            return endPosition;
        }
    }

    protected EntryPosition findPositionWithMasterIdAndTimestamp(MysqlConnection connection, EntryPosition fixedPosition) {
        MysqlConnection mysqlConnection = (MysqlConnection) connection;
        if (tableMetaTSDB != null && (fixedPosition.getTimestamp() == null || fixedPosition.getTimestamp() <= 0)) {
            // 使用一个未来极大的时间，基于位点进行定位
            long startTimestamp = System.currentTimeMillis() + 102L * 365 * 24 * 3600 * 1000; // 当前时间的未来102年
            EntryPosition entryPosition = findAsPerTimestampInSpecificLogFile(mysqlConnection,
                startTimestamp,
                fixedPosition,
                fixedPosition.getJournalName(),
                true);
            if (entryPosition == null) {
                throw new CanalParseException("[fixed timestamp] can't found begin/commit position before with fixed position "
                                              + fixedPosition.getJournalName() + ":" + fixedPosition.getPosition());
            }
            return entryPosition;
        } else {
            return fixedPosition;
        }
    }

    protected EntryPosition findStartPositionInternal(ErosaConnection connection) {
        MysqlConnection mysqlConnection = (MysqlConnection) connection;
        LogPosition logPosition = logPositionManager.getLatestIndexBy(destination);
        if (logPosition == null) {// 找不到历史成功记录
            EntryPosition entryPosition = null;
            if (masterInfo != null && mysqlConnection.getConnector().getAddress().equals(masterInfo.getAddress())) {
                entryPosition = masterPosition;
            } else if (standbyInfo != null
                       && mysqlConnection.getConnector().getAddress().equals(standbyInfo.getAddress())) {
                entryPosition = standbyPosition;

View on GitHub (pinned to 87be50e876)

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.

Example fix

# before: position without timestamp triggers future-102y scan
canal.instance.master.position=mysql-bin.000010:12345
# after: include a timestamp so the scan is skipped
canal.instance.master.position=mysql-bin.000010:12345
canal.instance.master.timestamp=1690000000000

Defensive patterns

Strategy: validation

Validate before calling

// Ensure the fixed position has a timestamp or the binlog still exists
if (tableMetaTSDB != null && (fixedPosition.getTimestamp() == null || fixedPosition.getTimestamp() <= 0)) {
    if (!binlogExistsOnMaster(connection, fixedPosition.getJournalName())) {
        throw new IllegalStateException("Fixed binlog " + fixedPosition.getJournalName() + " not found on master; reset position.");
    }
}

Prevention

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.

When it happens

Trigger: 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.

Common situations: 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.

Related errors

AI-assisted analysis of alibaba/canal@87be50e876 (2026-08-14). Data as JSON: /api/errors/889c8670a627e803. Report an issue: GitHub.