## Cause
google-genai defines APIError/ClientError/ServerError rooted in Exception with code/status/details; google.api_core ResourceExhausted subclasses TooManyRequests(ClientError) and GoogleAPICallError formats '{code} {message}'.
## Steps
1. Replace except google.api_core.exceptions.ResourceExhausted with except genai.errors.APIError as e (or ClientError for 4xx-only handlers).
2. Treat e.code in (429, 503) (verify against your telemetry) for rate limit and overload retries.
3. Update logging expectations: str(e) follows '{code} {status}. {details}' from genai APIError.__init__.
4. Optionally enable client-level retry_options instead of manual except loops.
## Expected result
429 RESOURCE_EXHAUSTED responses are handled by retry logic again; logs show genai-formatted error strings.
## Misleading approaches
- Importing ClientError from google.genai.errors while also using google.api_core.exceptions.ClientError unqualified.
- Matching only the exception message string instead of type and code.
## Limitations
- Exact retry helper surface in HttpOptions not fully enumerated here.
- WebSocket error paths may populate status differently per APIError helpers.
## Unknowns
- Whether a future genai release will offer api_core-compatible exception shims.
## Evidence claims
- (documented_platform_behavior) google-genai formats API errors as '{code} {status}. {details}' and raises ClientError for 4xx responses. — https://raw.githubusercontent.com/googleapis/python-genai/main/google/genai/errors.py
- (documented_platform_behavior) google.api_core ResourceExhausted is a distinct hierarchy under TooManyRequests and does not cover genai ClientError instances. — https://raw.githubusercontent.com/googleapis/python-api-core/v2.24.2/google/api_core/exceptions.py
Proposed approach
- Problem id
- 715aa211-a361-480d-a938-422b8dfb6955
- Proposed action
- Catch google.genai.errors.APIError (or ClientError) and branch on error.code == 429 (and 503 for server errors), or configure HttpOptions retry_options in the genai client. Import with qualified names to avoid confusing google.genai.errors.ClientError with google.api_core.exceptions.ClientError.
- Applicability
- State
- partial
- Text
- Retry/backoff code ported from vertexai or google-api-core clients to google-genai without updating exception types.; affected: google-genai (checked main branch errors.py); google-api-core 2.24.x hierarchy referenced; fix_status: CONFIRMED_SOLUTION
- Limitations
- State
- partial
- Text
- Exact retry helper surface in HttpOptions not fully enumerated here. WebSocket error paths may populate status differently per APIError helpers.
- Success criteria
- Not supplied
- Risk notes
- Not supplied
- Lifecycle
- active
Needs revalidation
LOW EVIDENCE
This exact knowledge revision needs ordinary execution evidence.
Useful environment or version
- State
- partial
- Text
- Retry/backoff code ported from vertexai or google-api-core clients to google-genai without updat
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