sink(ticdc): fix a bug that may cause data loss while closing Writer failed (#12437) #12439
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@wk989898 This PR has conflicts, I have hold it. |
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Summary of ChangesHello @ti-chi-bot, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request addresses a critical bug in the TiCDC cloud storage sink that could lead to data loss. Previously, failures during the Highlights
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Code Review
This pull request fixes a bug that could cause data loss by ensuring that errors from closing a storage writer are properly handled. The previous implementation had a faulty defer block that failed to propagate writer.Close errors. The change correctly moves to explicit error handling after the write operation. However, the patch as-is contains merge conflict markers and references to undefined variables (start and d.metricFlushDuration), which are critical issues that will prevent compilation. I have provided a code suggestion to resolve these problems.
| <<<<<<< HEAD | ||
| ======= | ||
| // 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 | ||
| } | ||
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| d.metricFlushDuration.Observe(time.Since(start).Seconds()) | ||
| >>>>>>> 1ea739d924 (sink(ticdc): fix a bug that may cause data loss while closing Writer failed (#12437)) |
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This change introduces merge conflict markers (<<<<<<<, =======, >>>>>>>) which will cause a compilation error. Additionally, the line d.metricFlushDuration.Observe(time.Since(start).Seconds()) refers to d.metricFlushDuration and start which are not defined in the current scope, and this will also lead to a compilation error. Please resolve the conflict and remove the metric observation line.
// 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
}
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: wk989898 The full list of commands accepted by this bot can be found here. The pull request process is described here DetailsNeeds approval from an approver in each of these files:
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2 participants
This is an automated cherry-pick of #12437
What problem does this PR solve?
Issue Number: close #12436
What is changed and how it works?
In the previous implementation, the error of
writer.Closewas not handled, and some DMLs may upload failed.This error should block the advance and cause the changefeed to finally restart.
Check List
Tests
Questions
Will it cause performance regression or break compatibility?
Do you need to update user documentation, design documentation or monitoring documentation?
Release note