From 5735a2c2a2b31da502783d51e127d48fc09b0d05 Mon Sep 17 00:00:00 2001 From: Alexsander Hamir Date: Thu, 5 Feb 2026 15:43:13 -0800 Subject: [PATCH] fix(prometheus): use return_exceptions=True for budget metric lookups Make asyncio.gather resilient to partial failures. If key, team, or user lookup raises, log at debug level and allow the others to complete. Prevents one failing lookup from blocking the rest. --- litellm/integrations/prometheus.py | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/litellm/integrations/prometheus.py b/litellm/integrations/prometheus.py index d8b1321b10d..58e3ac3c0ba 100644 --- a/litellm/integrations/prometheus.py +++ b/litellm/integrations/prometheus.py @@ -1174,7 +1174,7 @@ class PrometheusLogger(CustomLogger): "user_api_key_user_max_budget", None ) - await asyncio.gather( + results = await asyncio.gather( self._set_api_key_budget_metrics_after_api_request( user_api_key=user_api_key, user_api_key_alias=user_api_key_alias, @@ -1195,7 +1195,13 @@ class PrometheusLogger(CustomLogger): user_max_budget=_user_max_budget, response_cost=response_cost, ), + return_exceptions=True, ) + for i, r in enumerate(results): + if isinstance(r, Exception): + verbose_logger.debug( + f"[Non-Blocking] Prometheus: Budget metric lookup {['key', 'team', 'user'][i]} failed: {r}" + ) def _increment_top_level_request_and_spend_metrics( self,