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d5ca88900c
* fix(anthropic): answer a 503 as 529 overloaded_error on /v1/messages
Anthropic's error contract has no 503, so a client built against it (Claude Code) treats a 503 from /v1/messages as a plain 5xx and retries it ten times instead of taking its overload path. A Bedrock 503 now leaves /v1/messages and /v1/messages/count_tokens as 529 overloaded_error, for both a JSON answer and a stream that fails before its first byte.
An Anthropic 529 overloaded_error now maps to litellm.ServiceUnavailableError (503) instead of InternalServerError (500), so OpenAI-shaped routes answer it as 503, the status OpenAI documents for an overloaded engine, and router retry and allowed-fails policies key it as ServiceUnavailableError.
* test(proxy): expect overloaded_error on a 503 stream error after a keepalive ping
* fix(proxy): record the 529 the Anthropic routes answer and type the chat stream error frame
The messages route stamps the answered status on the exception before post_call_failure_hook runs, so the spend log row, the OTel server span, the failed-request metric, and alerting record the 529 the client saw instead of the deployment's 503, while the deployment failure metric and cooldown keep the deployment's own status. A chat completions stream error frame names the type its status stands for instead of the null .type ServiceUnavailableError carries. An Anthropic-shaped 503 envelope passes through as 529 overloaded_error through a validated TypedDict, and count_tokens answers every ProxyException as the Anthropic envelope. Five integration tests that pinned 503 on the messages route now expect 529
* test(proxy): expect the top-level Anthropic envelope from count_tokens errors
count_tokens now answers a ProxyException as a JSONResponse carrying the
Anthropic error envelope instead of raising HTTPException, which FastAPI
wrapped in {"detail": ...}. The three legacy error-format tests now read
the response body and check that no detail wrap is left.
* test(proxy): cover the 529 overloaded_error answer across routes, cooldown, and retry budgets
* fix(anthropic): keep Anthropic overloads as InternalServerError and answer 529 from the provider status
An upstream Anthropic 529 stays litellm.InternalServerError (status 500) so
InternalServerErrorRetries, InternalServerErrorAllowedFails, SDK handlers,
and the OpenAI-shaped routes behave as on main. The error now carries
provider_status_code, and the /v1/messages routes answer 529
overloaded_error from it.
* refactor(proxy): unwrap a mid-stream fallback error once instead of recursing for the provider status
* fix(anthropic): keep count_tokens' detail body, end keepalive streams with an Anthropic error event, and log any 529 as an overload
* test(integration): cover the audit round 3 cells and expect 529 on the count_tokens 503 cases
* fix(proxy): re-raise an unchanged stream HTTPException as itself and walk nested mid-stream fallbacks for the provider status
* fix(proxy): walk nested mid-stream fallbacks without recursion
* fix(anthropic): preserve 503s and answer upstream 529s on messages routes
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(anthropic): answer an upstream Anthropic 529 as 529 on count_tokens
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(anthropic): use integration coverage for keepalive errors
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---------
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
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|---|---|---|
| .. | ||
| _prompt_cache_pin_support.py | ||
| _reasoning_effort_levels_support.py | ||
| either_role.json | ||
| test_advisor_failure_cooldown.py | ||
| test_anthropic_overloaded_cooldown_owned_proxy.py | ||
| test_audit_any_sweep_chaos.py | ||
| test_auto_router_management.py | ||
| test_azure_passthrough_spend_row.py | ||
| test_base_model_context_window_owned_proxy.py | ||
| test_batch_mode_deployments_wire.py | ||
| test_complexity_router_codex_compaction.py | ||
| test_complexity_router_databricks_classifier.py | ||
| test_complexity_router_llm_classifier.py | ||
| test_declared_provider_bare_model_routes.py | ||
| test_deployment_mode_routing_wire.py | ||
| test_deployment_num_retries_generic_routes_wire.py | ||
| test_encrypted_content_affinity_no_peer.py | ||
| test_end_user_region_routing.py | ||
| test_enforce_model_rate_limits_daily_limits.py | ||
| test_fallback_hop_foreign_encrypted_reasoning.py | ||
| test_fallback_retry_header_contracts.py | ||
| test_include_fallback_errors_wire.py | ||
| test_key_max_parallel_requests.py | ||
| test_key_router_settings_image_generation.py | ||
| test_key_tpm_reservation.py | ||
| test_messages_stream_retry_budget_sources_owned_proxy.py | ||
| test_model_capability_flags.py | ||
| test_non_chat_model_endpoint_gate.py | ||
| test_observed_routing.py | ||
| test_otpm_default_reservation_fraction.py | ||
| test_payment_required_cooldown.py | ||
| test_payment_required_mapping.py | ||
| test_pdf_document_pre_call_checks_owned_proxy.py | ||
| test_per_model_rate_limit_fallbacks.py | ||
| test_per_model_rate_limit_fallbacks_lifecycle.py | ||
| test_pre_call_response_format_filter.py | ||
| test_priority_model_tpm_enforcement.py | ||
| test_priority_rate_limit_headers.py | ||
| test_priority_scheduler_queue_cleanup.py | ||
| test_prompt_cache_pin_memory_routes.py | ||
| test_prompt_cache_pin_ttl.py | ||
| test_prompt_cache_pin_ttl_chaos.py | ||
| test_prompt_caching_affinity_tool_call_marks.py | ||
| test_ptu_shares.py | ||
| test_ptu_shares_regex_timing.py | ||
| test_reasoning_effort_levels_chaos.py | ||
| test_reasoning_effort_levels_wire.py | ||
| test_redis_increment_with_floor.py | ||
| test_redis_recovery.py | ||
| test_responses_websocket_turn_admission.py | ||
| test_router_strategies_count_async_requests_once.py | ||
| test_silent_model_shadow_wire.py | ||
| test_stale_cost_map_boot.py | ||
| test_tag_routing_prefix.py | ||
| test_team_tag_routing.py | ||
| test_team_wildcard_precedence.py | ||
| test_usage_based_routing_redis_reads.py | ||
| test_user_config_routing.py | ||
| test_video_poll_routing_wire.py | ||
| test_vllm_passthrough_spend_row.py | ||
| test_vllm_passthrough_stream_relay.py | ||
| test_vllm_passthrough_stream_usage_settings.py | ||
| test_wildcard_model_listing.py | ||