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sink(ticdc): fix a bug that may cause data loss while closing Writer failed (#12437) #12440

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sink(ticdc): fix a bug that may cause data loss while closing Writer failed (#12437) #12440

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ac72ac5
This is an automated cherry-pick of #12437
wk989898 Dec 5, 2025
e6b66cd
Update dml_worker.go
wk989898 Dec 5, 2025
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25 changes: 12 additions & 13 deletions cdc/sink/dmlsink/cloudstorage/dml_worker.go
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Original file line number Diff line number Diff line change
Expand Up @@ -250,22 +250,21 @@ func (d *dmlWorker) writeDataFile(ctx context.Context, path string, task *single
return 0, 0, inErr
}

defer func() {
closeErr := writer.Close(ctx)
if inErr != nil {
log.Error("failed to close writer", zap.Error(closeErr),
zap.Int("workerID", d.id),
zap.Any("table", task.tableInfo.TableName),
zap.String("namespace", d.changeFeedID.Namespace),
zap.String("changefeed", d.changeFeedID.ID))
if inErr == nil {
inErr = closeErr
}
}
}()
if _, inErr = writer.Write(ctx, buf.Bytes()); inErr != nil {
return 0, 0, inErr
}

// We have to wait the writer to close to complete the upload
// If failed to close writer, some DMLs may not be upload successfully
if inErr = writer.Close(ctx); inErr != nil {
log.Error("failed to close writer", zap.Error(inErr),
zap.Int("workerID", d.id),
zap.Any("table", task.tableInfo.TableName),
zap.String("namespace", d.changeFeedID.Namespace),
zap.String("changefeed", d.changeFeedID.ID))
return 0, 0, inErr
}

return rowsCnt, bytesCnt, nil
}); err != nil {
return err
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