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7a641e5172
* 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>
* fix(proxy): answer an upstream overload with 503 server_is_overloaded on OpenAI routes
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(proxy): pass answered overload status to failure hooks
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(proxy): preserve Anthropic route exception handling
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* refactor(proxy): bind the transformed failure without rebinding the parameter
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(proxy): observe the overload failure hook through a real ProxyLogging
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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| .. | ||
| _azure_storage_support.py | ||
| _langfuse_otel_metadata_support.py | ||
| _logging_only_scope_support.py | ||
| _openinference_support.py | ||
| _s3_v2_support.py | ||
| _ternary_support.py | ||
| azure_dispatch_support.py | ||
| conftest.py | ||
| logging_worker_drain_canary.py | ||
| test_akto_logging_only.py | ||
| test_anthropic_overloaded_failure_signals.py | ||
| test_apply_guardrail_endpoint.py | ||
| test_arize_otel_v2_openinference_chaos.py | ||
| test_arize_otel_v2_openinference_family.py | ||
| test_arize_otel_v2_openinference_modes.py | ||
| test_arize_otel_v2_openinference_sad_edge.py | ||
| test_arize_otel_v2_openinference_spans.py | ||
| test_azure_content_safety_audit.py | ||
| test_azure_content_safety_dispatch.py | ||
| test_azure_content_safety_dispatch_resilience.py | ||
| test_azure_content_safety_endpoints.py | ||
| test_azure_storage_chaos.py | ||
| test_azure_storage_client_ttl.py | ||
| test_azure_storage_file_names.py | ||
| test_batch_line_items_cold_storage.py | ||
| test_bedrock_converse_guardrail_rewrites.py | ||
| test_bedrock_converse_stream_post_call_guardrail.py | ||
| test_bedrock_error_request_id.py | ||
| test_bedrock_guardrail_attachments.py | ||
| test_bedrock_invoke_stream_post_call_guardrail.py | ||
| test_cache_hit_guardrail_metrics.py | ||
| test_cache_hit_guardrail_metrics_chaos.py | ||
| test_callback_delivery.py | ||
| test_content_filter_logging_only.py | ||
| test_custom_logger_hook_counts.py | ||
| test_custom_logger_hook_counts_chaos.py | ||
| test_custom_logger_hook_counts_modes.py | ||
| test_custom_logger_hook_counts_post_call_block.py | ||
| test_custom_logger_hook_counts_vendors.py | ||
| test_custom_logger_redaction.py | ||
| test_datadog_logging_delivery.py | ||
| test_file_usage_counter_span.py | ||
| test_generic_guardrail_api_wire.py | ||
| test_generic_guardrail_num_retries.py | ||
| test_grayswan_wire.py | ||
| test_grayswan_wire_chaos.py | ||
| test_guardrail_attachment.py | ||
| test_guardrail_effects.py | ||
| test_guardrail_load_balancing.py | ||
| test_guardrail_pipeline_applied_header.py | ||
| test_guardrail_stream_scope.py | ||
| test_guardrail_stream_scope_chaos.py | ||
| test_guardrail_stream_scope_matrix.py | ||
| test_guardrail_timeout_all_providers.py | ||
| test_langfuse_delivery.py | ||
| test_langfuse_otel_console_output.py | ||
| test_langfuse_otel_legacy_destinations.py | ||
| test_langfuse_otel_metadata_chaos.py | ||
| test_langfuse_otel_metadata_clients.py | ||
| test_langfuse_otel_metadata_destinations.py | ||
| test_langfuse_otel_metadata_identity.py | ||
| test_langfuse_otel_tenant_only.py | ||
| test_langfuse_otel_trace_fields.py | ||
| test_langsmith_logging_delivery.py | ||
| test_langtrace_delivery.py | ||
| test_logging_only_scope_chaos.py | ||
| test_logging_only_scope_config.py | ||
| test_logging_only_scope_runtime.py | ||
| test_logging_worker_drain.py | ||
| test_otel_cache_hit_cost.py | ||
| test_otel_conversation_id.py | ||
| test_otel_excluded_services.py | ||
| test_otel_excluded_services_matrix.py | ||
| test_otel_team_capture_message_content.py | ||
| test_otel_team_sampling_across_pods.py | ||
| test_otel_text_completion_choices.py | ||
| test_otel_trace_response_header.py | ||
| test_otel_v1_request_trace.py | ||
| test_ovalix_guardrail.py | ||
| test_panw_airs_block_masked_response.py | ||
| test_passthrough_guardrail_scan_text.py | ||
| test_passthrough_operation_name.py | ||
| test_passthrough_upstream_error_chaos.py | ||
| test_passthrough_upstream_error_visibility.py | ||
| test_presidio_entity_masking.py | ||
| test_presidio_masking_endpoints.py | ||
| test_presidio_overlapping_spans.py | ||
| test_presidio_streaming_output.py | ||
| test_prometheus_deployment_failure_api_provider.py | ||
| test_prometheus_project_alias_label.py | ||
| test_prometheus_provider_auth_failure.py | ||
| test_prometheus_provider_auth_failure_chaos.py | ||
| test_prometheus_request_metrics.py | ||
| test_prometheus_series_cap.py | ||
| test_prometheus_series_cap_chaos.py | ||
| test_prometheus_shared_custom_labels.py | ||
| test_realtime_guardrail_translation.py | ||
| test_s3_v2_flush_surfaces.py | ||
| test_s3_v2_partition_granularity.py | ||
| test_s3_v2_streaming_failure_dedupe.py | ||
| test_s3_v2_upload_fanout.py | ||
| test_signoz_delivery.py | ||
| test_straiker_v3_platform.py | ||
| test_stream_error_alert_api_base.py | ||
| test_ternary_focus_export.py | ||
| test_weave_key_scoped_delivery.py | ||
| test_wingback_guardrail.py | ||
| test_xecguard_wire.py | ||