ollama_connection_errorTier 1 · 70% confidence

ai-agents-ollama-connection-er-query-engine-query-fails-with-connecterror-errno-9-58cf13d5

agent: ai_agents

When does this happen?

IF query_engine.query fails with ConnectError: [Errno 99] Cannot assign requested address when using Ollama as the LLM.

How others solved it

THEN Verify that the Ollama server is running and accessible. Check the host and port configuration (default http://site_1:11434). Ensure no other process is using the port and that network restrictions (e.g., Colab outbound rules) are not blocking the connection. For a quick test, run `curl http://site_2:11434/api/tags` or use a Python HTTP client to confirm the endpoint is reachable.

import httpx
try:
    resp = httpx.get('http://localhost:11434/api/tags')
    resp.raise_for_status()
    print('Ollama is running')
except Exception as e:
    print(f'Ollama not reachable: {e}')

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