llama-stack-mirror/llama_stack/core
Sumanth Kamenani 55a8c5f439
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fix: show descriptive MCP server connection errors instead of generic 500s (#3256)
What does this PR do?

Fixes error handling when MCP server connections fail. Instead of
returning generic 500 errors, now provides
   descriptive error messages with proper HTTP status codes.

  Closes #3107

  Test Plan

  Before fix:
curl -X GET
"http://localhost:8321/v1/tool-runtime/list-tools?tool_group_id=bad-mcp-server"
Returns: {"detail": "Internal server error: An unexpected error
occurred."} (500)

  After fix:
curl -X GET
"http://localhost:8321/v1/tool-runtime/list-tools?tool_group_id=bad-mcp-server"
Returns: {"error": {"detail": "Failed to connect to MCP server at
http://localhost:9999/sse: Connection
  refused"}} (502)

  Tests:
  - Added unit test for ConnectionError → 502 translation
  - Manually tested with unreachable MCP servers (connection refused)
2025-09-04 13:25:02 -07:00
..
access_control chore(rename): move llama_stack.distribution to llama_stack.core (#2975) 2025-07-30 23:30:53 -07:00
routers chore: async inference store write (#3318) 2025-09-04 11:37:46 -07:00
routing_tables refactor(logging): rename llama_stack logger categories (#3065) 2025-08-21 17:31:04 -07:00
server fix: show descriptive MCP server connection errors instead of generic 500s (#3256) 2025-09-04 13:25:02 -07:00
store refactor(logging): rename llama_stack logger categories (#3065) 2025-08-21 17:31:04 -07:00
ui chore: rename templates to distributions (#3035) 2025-08-04 11:34:17 -07:00
utils refactor(logging): rename llama_stack logger categories (#3065) 2025-08-21 17:31:04 -07:00
__init__.py chore(rename): move llama_stack.distribution to llama_stack.core (#2975) 2025-07-30 23:30:53 -07:00
build.py feat(distro): no huggingface provider for starter (#3258) 2025-08-26 14:06:36 -07:00
build_container.sh chore: rename templates to distributions (#3035) 2025-08-04 11:34:17 -07:00
build_venv.sh fix(ci, tests): ensure uv environments in CI are kosher, record tests (#3193) 2025-08-18 17:02:24 -07:00
client.py chore(rename): move llama_stack.distribution to llama_stack.core (#2975) 2025-07-30 23:30:53 -07:00
common.sh refactor: remove Conda support from Llama Stack (#2969) 2025-08-02 15:52:59 -07:00
configure.py chore(pre-commit): add pre-commit hook to enforce llama_stack logger usage (#3061) 2025-08-20 07:15:35 -04:00
datatypes.py feat: Add CORS configuration support for server (#3201) 2025-08-21 14:23:27 -07:00
distribution.py chore(rename): move llama_stack.distribution to llama_stack.core (#2975) 2025-07-30 23:30:53 -07:00
external.py chore(rename): move llama_stack.distribution to llama_stack.core (#2975) 2025-07-30 23:30:53 -07:00
inspect.py chore(rename): move llama_stack.distribution to llama_stack.core (#2975) 2025-07-30 23:30:53 -07:00
library_client.py feat: Remove initialize() Method from LlamaStackAsLibrary (#2979) 2025-08-21 15:59:04 -07:00
providers.py chore(rename): move llama_stack.distribution to llama_stack.core (#2975) 2025-07-30 23:30:53 -07:00
request_headers.py chore(pre-commit): add pre-commit hook to enforce llama_stack logger usage (#3061) 2025-08-20 07:15:35 -04:00
resolver.py chore: Improve error message for missing provider dependencies (#3315) 2025-09-03 16:11:59 +02:00
stack.py fix: Remove bfcl scoring function as not supported (#3281) 2025-08-29 11:03:52 -07:00
start_stack.sh refactor: remove Conda support from Llama Stack (#2969) 2025-08-02 15:52:59 -07:00