chore: pass bedrock_client with UNSIGNED to prevent IMDS timeout from langchain_aws by cosmin-staicu · Pull Request #693 · UiPath/uipath-langchain-python

cosmin-staicu · 2026-03-14T15:52:11Z

PR chore: use botocore.UNSIGNED to prevent IMDS timeout in bedrock #692 fixed the bedrock-runtime client IMDS timeout, but langchain_aws's ChatBedrockConverse.validate_environment() creates its own bedrock control plane client when
bedrock_client is not passed, triggering the same credential chain walk and ~2s IMDS timeout
Added get_bedrock_client() using botocore.UNSIGNED and pass it as bedrock_client kwarg in both UiPathChatBedrockConverse and UiPathChatBedrock constructors
Moved total_max_attempts: 1 and read_timeout=300 to only apply to the bedrock-runtime client; the bedrock control plane client uses default retry/timeout behavior
Extracted _build_session() and _unsigned_config() helpers to share session and config logic between both clients

chore: use botocore.UNSIGNED for bedrock_client

9512fb9

cosmin-staicu requested a review from cristipufu March 14, 2026 15:52

cosmin-staicu self-assig A379 ned this Mar 14, 2026

cosmin-staicu enabled auto-merge (squash) March 14, 2026 15:55

cristipufu approved these changes Mar 14, 2026

View reviewed changes

cosmin-staicu merged commit 899a056 into main Mar 14, 2026
39 checks passed

cosmin-staicu deleted the fix/bedrock_client branch March 14, 2026 15:56

Provide feedback