Fix: upload v3 chunk upload error - #330
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This repository does not receive automatic reviews because it has fewer than 10 stars. ⚙️ Run configurationConfiguration used: defaults Review profile: CHILL Plan: Team Run ID: 📝 WalkthroughWalkthroughThe changes normalize Dropzone polling and timeout errors, forward XHR status codes through DropzoneV3, localize upload messages, prevent duplicate file errors, and update related tests. The package version changed to ChangesUpload error handling
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: 🟡 Moderate · up to The upload error-flow changes can misreport terminal polling outcomes, exceed configured chunk concurrency, or merge separate same-name uploads into one error state. These cases can affect parallel and chunked uploads, so the identified safeguards should be implemented before merge. Sequence Diagram(s)sequenceDiagram
participant DropzoneJS
participant DropzoneEmitter
participant DropzoneV3
participant UploadInputV3
DropzoneJS->>DropzoneJS: Detect polling or upload error
DropzoneJS->>DropzoneEmitter: Emit error with file and message
DropzoneEmitter->>DropzoneV3: Invoke error callback with xhr
DropzoneV3->>UploadInputV3: Forward file, message, and xhr status
UploadInputV3->>UploadInputV3: Translate message and update error list
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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🧪 Generate unit tests (beta)
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smarcet
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@santipalenque please review
… rows, surface status, route polling failures to error UI
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🟡 Changes recommended
There are identified API/behavior issues (notably Dropzone error event forwarding and misleading handling of non-OK polling responses) that should be corrected before approval.
Once you've addressed the issues Copilot identified, you can request another Copilot review.
Pull request overview
This PR addresses chunk-upload failure handling in the Dropzone-based upload flow (v3), aiming to prevent stalled uploads and show clearer, user-actionable error messages when chunk uploads or async status polling fail.
Changes:
- Adds user-friendly i18n strings for upload error states and replaces hardcoded “Loading/Complete” labels with translations.
- Improves Dropzone error propagation by forwarding xhr status and routing polling failures through the file-level Dropzone error channel.
- Adds/updates unit tests for status forwarding, deduping repeated chunk errors, and timeout/concurrency-slot release behavior; bumps package version.
File summaries
| File | Description |
|---|---|
| src/i18n/en.json | Adds upload v3 error/status strings used for user-facing messaging. |
| src/components/inputs/upload-input-v3/index.js | Maps low-level Dropzone/polling errors to translated, user-friendly messages and updates status label rendering. |
| src/components/inputs/upload-input-v3/dropzone-v3.js | Forwards Dropzone error details into UploadInputV3 callbacks. |
| src/components/inputs/upload-input-v3/tests/upload-input-v3.test.js | Updates status label expectations and adds tests for error-row collapsing and readable messaging. |
| src/components/inputs/upload-input-v3/tests/dropzone-v3.test.js | Adds coverage for forwarding xhr status (and missing-xhr cases). |
| src/components/inputs/dropzone/index.js | Routes polling failures through Dropzone’s file-level error channel; ensures timed-out chunks release concurrency slots; forwards xhr status to onError. |
| src/components/inputs/dropzone/tests/dropzone.test.js | Adds tests for timeout slot release and polling failure branches; improves Dropzone mock emitter behavior. |
| package.json | Bumps package version to 5.0.58-beta.0. |
Review details
- Files reviewed: 8/8 changed files
- Comments generated: 2
- Review effort level: Lite
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Actionable comments posted: 3
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Inline comments:
In `@src/components/inputs/dropzone/index.js`:
- Around line 127-130: Update the polling logic in the dropzone component to
track whether each file’s poll has already settled, and check that state before
every terminal success or error action, including the branches around the
existing response.ok handling and upload completion. Ensure only the first
terminal result stops polling, reports an error, or completes the upload; ignore
later success or failure continuations. Add a test using two deferred polling
requests that settle after the first terminal result and verify the error
callback or completion occurs only once.
- Around line 517-518: Track per-XHR whether the request is a throttled chunk,
and invoke onChunkComplete only when that marker is set in the onload, onerror,
and ontimeout handlers; leave non-chunked uploads from affecting chunksInFlight
or maxConcurrentChunks scheduling.
In `@src/components/inputs/upload-input-v3/index.js`:
- Around line 210-212: Update the upload state handling around the file removal,
replacement, and dismissal logic to use a stable unique per-upload identifier
instead of the name-and-size pair. Preserve each accepted file as a separate
entry, including when names and sizes match, and ensure preview cleanup, error
replacement, and dismissal target only the matching upload.
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📒 Files selected for processing (8)
package.jsonsrc/components/inputs/dropzone/__tests__/dropzone.test.jssrc/components/inputs/dropzone/index.jssrc/components/inputs/upload-input-v3/__tests__/dropzone-v3.test.jssrc/components/inputs/upload-input-v3/__tests__/upload-input-v3.test.jssrc/components/inputs/upload-input-v3/dropzone-v3.jssrc/components/inputs/upload-input-v3/index.jssrc/i18n/en.json
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Code review
Found 2 issues, both on the polling error branches this PR rewrites. Details inline.
Not blocking, but worth an explicit decision: coderabbit's point 2 on #221 (r3114561366, which you validated at the time with "this seems a valid argument") is still open. A single transient 502 or network blip now ends polling terminally instead of retrying until maxAttempts — the !response.ok branch as written is exactly what was requested in this PR, but it is the same flaky-connection population the PR targets, so either close it here or open a ticket.
Verified and not flagged: the xhr.ontimeout wrapper is correct (dropzone 5.7.2 assigns xhr.ontimeout at dist/dropzone.js:2404 and emits "sending" at :2469, so the original handler is preserved and still called); emit('error', file, message) does reach onFileError (setupEvents binds eventHandlers.error via on()); and reportPollingError's typeof this.dropzone?.emit === 'function' guard correctly covers the post-unmount case where destroy() returned an Array.
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romanetar
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@santipalenque please review
smarcet
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@santipalenque please review
ref: https://app.clickup.com/t/9014802374/86bbj8z60
ref: https://app.clickup.com/t/9014802374/86bbhwffq
Summary
Chunked uploads through
UploadInputV3failed in three user-visible ways when the connection dropped or the server took too long:Server responded with 0 code.message, once per failed chunk, so a single file produced several identical error rows.status: 'error'from the server, fetch rejection) only reached the consumer'sonErrorprop, so the uploading row stayed on "Loading" with no indication of what happened. A non-2xx response from the status endpoint was never detected at all and kept polling for the full 10-minute ceiling.Changes
src/components/inputs/dropzone/index.jsxhr.ontimeoutin thesendinghandler so a timed-out chunk callsonChunkComplete()and releases its slot before Dropzone's own timeout handling runs.reportPollingError(file, message), which emits Dropzone's file-levelerrorevent so the row clears and the consumer is notified exactly once. It falls back toonErrorwhen the Dropzone instance is already destroyed, since a poll tick can resolve after unmount.response.okon the status request: a non-2xx answer now stops polling and reportsNetwork error.Upload timed out,Network error, or the server-provideddata.message(fallbackUpload failed). The unuseddata.errorfallback is gone.xhr.statustoonErrorfrom theerrorevent, so a transport failure (status 0) can be told apart from a real server response.src/components/inputs/upload-input-v3/dropzone-v3.jsonFileErrorandeventHandlers.errorreceivexhr?.statusas a third argument (additive;undefinedfor client-side validation errors such as "File is too big.").src/components/inputs/upload-input-v3/index.jshandleFileErrormaps status 0 /Network error,Upload timed out,Upload failed,Auth errorandMax files reached.to translated messages underupload_input_v3.*. Any other message is shown as received.upload_input_v3.loading("Uploading") andupload_input_v3.completeinstead of hardcoded strings.src/i18n/en.jsonupload_input_v3:network_error,upload_timed_out,upload_failed,auth_error,max_files_reached,loading.package.json5.0.58-beta.0.Consumer impact
No breaking changes.
DropzoneJS'sonErrornow receives the XHR status as its second argument for Dropzone-emitted errors (it wasundefinedbefore);DropzoneV3'sonFileError/eventHandlers.errorgain a thirdstatusargument. Current consumers (sponsor-services, summit-admin) ignore both arguments.Tests
dropzone/__tests__/dropzone.test.js: a timed-out chunk releases its slot and still runs Dropzone's own timeout handler; each of the three poll failure branches emits a string message and callsonErrorexactly once.upload-input-v3/__tests__/dropzone-v3.test.js:xhr.statusis forwarded toonFileError, and isundefinedwhen Dropzone emits an error without an XHR.upload-input-v3/__tests__/upload-input-v3.test.js: two failed chunks for one file collapse into a single row; status 0 andNetwork errorrender the connection message instead of the raw Dropzone text; a non-zero server status keeps the server-provided message.Run with: