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litellm - 💡(How to fix) Fix [Bug]: Vertex AI models show as "Unhealthy" in Model Health Status dashboard since v1.84.0

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What happened?

Since upgrading to LiteLLM v1.84.0, Vertex AI models are incorrectly reported as "Unhealthy" in the Model Health Status dashboard. The API response for health checks shows healthy_count: 0 and unhealthy_count: 0, despite the models being operational. Interestingly, performing a "Test Connection" from the individual model detail page succeeds without any issues, indicating that the connectivity to Vertex AI is functioning correctly.

<img width="1630" height="856" alt="Image" src="https://github.com/user-attachments/assets/ef80d012-5d28-43f4-8c4d-e7077fa97453" />

Steps to Reproduce

  1. Upgrade LiteLLM to version 1.84.0.
  2. Configure a Vertex AI model in the config.yaml.
  3. Navigate to the Model Health Status dashboard.
  4. Observe that the model is marked as "Unhealthy" with the response: {"healthy_endpoints":[],"unhealthy_endpoints":[],"healthy_count":0,"unhealthy_count":0}
  5. Go to the specific model detail page and click "Test Connection".
  6. The test succeeds (confirming the model is actually healthy).

Relevant log output

What part of LiteLLM is this about?

Proxy

What LiteLLM version are you on ?

v1.84.0/v1.85.0

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#api#autograd error#model save/load#optimization#mixed precision

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litellm - 💡(How to fix) Fix [Bug]: Vertex AI models show as "Unhealthy" in Model Health Status dashboard since v1.84.0