Principle:SeldonIO Seldon core Explainer Readiness Verification
| Field | Value |
|---|---|
| Overview | Verifying that an explainer model is loaded and ready to generate explanations. |
| Domains | MLOps, Explainability |
| Workflow | Model_Explainability |
| Related Implementation | SeldonIO_Seldon_core_Seldon_Model_Status_Explainer |
| Last Updated | 2026-02-13 00:00 GMT |
Description
Explainer readiness verification uses the same seldon model status command as regular models. The explainer model must show ModelAvailable condition before explanation requests can be sent. Both the explainer and its referenced base model must be ready.
The readiness check serves multiple purposes:
- Deployment validation: Confirms that the explainer artifact was successfully loaded by the Alibi-Explain runtime on MLServer.
- Dependency verification: Implicitly ensures the base model referenced by
modelRefis accessible, since the explainer's initialization may query the base model. - Operational gating: Prevents sending explanation requests to an explainer that is still loading or has failed to initialize.
In automated deployment scripts and CI/CD pipelines, the -w ModelAvailable flag provides a blocking wait that only returns when the explainer is fully operational.
Theoretical Basis
Explainer readiness is a prerequisite check that ensures the explanation pipeline is fully operational. Since explainers depend on base models, readiness implicitly requires the base model's availability.
The readiness model follows a dependency chain:
- Base model must be ModelAvailable
- Explainer model must be ModelAvailable
- Only then can explanation requests be served
This sequential readiness pattern prevents race conditions where an explainer attempts to query a base model that has not yet completed loading.
Usage
After deploying an explainer model and before requesting explanations. This step is essential in deployment automation to ensure the explainer is fully initialized before traffic is routed to it.
Knowledge Sources
- Repo: SeldonIO/seldon-core
- Doc: Seldon Core 2 Documentation
Related Pages
- SeldonIO_Seldon_core_Seldon_Model_Status_Explainer - implements this principle - Concrete CLI tool for verifying explainer model readiness.
- SeldonIO_Seldon_core_Explainer_Model_Deployment - prerequisite - The explainer must be deployed before checking readiness.
- SeldonIO_Seldon_core_Explanation_Generation - next step - Generating explanations once the explainer is confirmed ready.
Implementation:SeldonIO_Seldon_core_Seldon_Model_Status_Explainer