MCP server actively closes connection

[petrproch]

I run the MCP server as a docker container at port 8000. However, it actively closes any connection attempt by client. There are no suspicious logs in docker (see screenshot). I tried a simple Python SSE client do debug, however didn't help much. The answer is simple:

PS C:\Work\new_AI\mcp-quadrant-test> python mcp_sse_logger.py
2025-06-24 10:56:44,099 [INFO] Connecting to SSE endpoint: http://localhost:8000/sse
2025-06-24 10:56:44,132 [ERROR] Error connecting to SSE server: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))

I attach the logs from docker and also a setup of container in docker.

mcp_qdrant_setup.txt