HTTPStatusError: Client error '429 Unknown Error' for url 'https://phabricator.services.mozilla.com/api/differential.creatediff'

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#6,837 opened on Sep 14, 2026 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 3/5
Estimated time: 1-2 days
Newbie friendliness: 45/100

Issue type: Bug
Clarity: Needs clarification
Activity status: Active
Tech stack: python
Domain: api, backend

Research direction

Start with app/action_handlers/phabricator_handler.py at apply and _conduit_request, then follow phabricator_client/client.py through conduit_request and conduit_call. Reproduce or trace the differential.creatediff request and determine the expected handling for the HTTP 429 response; the issue is complete when diff submission no longer fails unexpectedly and the relevant behavior is verified.

Written by the indexing model from the issue text.

Description

hackbot

Sentry Issue: HACKBOT-API-S

HTTPStatusError: Client error '429 Unknown Error' for url 'https://phabricator.services.mozilla.com/api/differential.creatediff'
For more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/429
  File "app/action_handlers/phabricator_handler.py", line 246, in apply
    diff_result = await _conduit_request(
  File "app/action_handlers/phabricator_handler.py", line 43, in _conduit_request
    return await _client().conduit_request(method, **payload)
  File "phabricator_client/client.py", line 115, in conduit_request
    data = await self.conduit_call(method, payload)
  File "phabricator_client/client.py", line 110, in conduit_call
    response.raise_for_status()
  File "httpx/_models.py", line 829, in raise_for_status
    raise HTTPStatusError(message, request=request, response=self)

Failed to submit Phabricator diff for bug 2071583

Dominant language: Python
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Forks: 351
Avg merge: 2d 11h
Merged PRs (30d): 61

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