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Persist data to Cloud Storage before processing to prevent OOM data loss#146

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jodeleeuw merged 9 commits intotestfrom
fix/early-persist-data-loss-prevention
Mar 31, 2026
Merged

Persist data to Cloud Storage before processing to prevent OOM data loss#146
jodeleeuw merged 9 commits intotestfrom
fix/early-persist-data-loss-prevention

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Summary

  • Writes incoming data to Cloud Storage (pending-data/ prefix) immediately after validation but before heavy processing (metadata, OSF upload)
  • If the function OOM-crashes during processing, the data survives in Cloud Storage and can be recovered
  • On successful OSF upload or successful queue, the pending copy is automatically cleaned up
  • Adds DATA_PERSIST_ERROR message for the (rare) case where the initial persist fails
  • Enables the storage emulator in firebase.json for testing
  • Adds emulator tests verifying the persist/cleanup cycle

Context

Issue #102 — OOM crashes during metadata or OSF upload processing kill the function instantly, bypassing all catch blocks. The researcher's data in the request body is permanently lost. This change ensures data is safely persisted before any memory-intensive work begins.

How it works

  1. After parameter validation and experiment checks, persistPending() writes the raw data to Cloud Storage
  2. Heavy processing continues as before (metadata, token resolution, OSF upload)
  3. On success: cleanupPending() removes the temporary file
  4. On queue (existing retry paths): cleanup runs since queueUpload writes its own copy
  5. On OOM crash: the pending file survives — a future recovery process can scan pending-data/ for stale files

Test plan

  • Emulator test: pending files are cleaned up after successful upload
  • Emulator test: no pending files created for requests that fail before persist step (missing params, inactive experiment)
  • Emulator test: multiple submissions don't leave orphaned files
  • Verify existing data/metadata emulator tests still pass

🤖 Generated with Claude Code

jodeleeuw and others added 9 commits March 30, 2026 18:55
…t data loss

When the Cloud Function OOM-crashes during metadata processing or OSF
upload, the researcher's data payload is lost because no catch block
executes. This change writes the data to Cloud Storage immediately after
validation, before any heavy processing begins. If the function crashes,
the data survives in the pending-data/ prefix and can be recovered.

On successful OSF upload (or successful queue), the pending copy is
cleaned up. Also adds the storage emulator config to firebase.json so
tests can exercise the persist/cleanup cycle.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Adds scheduledPendingRecovery that runs every 15 minutes to scan the
pending-data/ prefix for stale files (older than 15 min). For each
orphaned file, it replays the full processing pipeline: token resolution,
metadata processing (if active), and OSF upload. This handles the case
where api-data OOM-crashed after persisting but before completing.

Also updates persist-pending to store the full request envelope (including
metadataOptions) so the recovery function can replay metadata processing.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Add PUT /endpoint to mock server so OSF upload succeeds in tests
- Update early-persist test to use mock server
- Fix skip-metadata test assertion to check property existence instead
  of non-empty value (metadata errors return empty string without mock)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The metadata-emulator test already uses port 3000 for its mock server.
Use port 3001 with an inline mock server for the early-persist test
to avoid port conflicts when Jest runs tests in parallel.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The data-emulator test was flaky on CI due to resource contention
when running all test files in parallel. Increase the polling
timeout from 10s to 30s.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Instead of reimplementing OSF upload logic, the recovery function now
promotes orphaned pending-data/ files into the existing uploadQueue
system. This means recovered data immediately appears in the
researcher's dashboard QueuePanel and follows the same retry/download
lifecycle as normal upload failures.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Expand "Why am I seeing this?" to cover OOM/crash recoveries
  alongside OSF errors and config issues
- Map raw failure reasons to plain-language descriptions so
  researchers understand what happened without technical jargon

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Pending uploads are no longer shown in the alert panel. A light
  text indicator near the header badges shows retry count and next
  retry time instead — no alarm for things the system handles.
- The full alert panel (FailedUploadsPanel) only appears when uploads
  have exhausted all retries and the researcher needs to download.
- Failure reasons get their own REASON column instead of tiny text
  under the filename.
- Replace ATTEMPTS column with AUTO-CLEANUP (time until data expires).
- Add UploadsResolvedNotice: brief success confirmation when all
  queued uploads complete, so the panel doesn't just vanish.
- Remove error log mixing from the queue table (ErrorPanel handles
  those separately).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Researchers should be able to see and download queued data files
as soon as they appear, not after 30 hours of retries. The panel
now shows all entries (pending + failed) in a single table with:
- STATUS column with badge and next retry time for pending items
- REASON column with human-readable failure explanation
- STORED FOR column showing time until auto-cleanup
- Download button available immediately for every entry

The panel uses warning tone for pending items (retries still
running) and error tone when all retries are exhausted.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
@jodeleeuw jodeleeuw merged commit 2873cae into test Mar 31, 2026
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