What should be done first when a retriever fails to fetch data?

When a retriever fails to fetch data, the most logical first step is to check the retriever configuration and data source mappings. This step is crucial because it allows you to diagnose whether the issue stems from incorrect settings or misconfigured connections to data sources. Proper configuration ensures that the retriever is pointing to the correct data source and using appropriate parameters to fetch information.

Verifying the configuration also helps to identify any potential issues, such as misaligned data source URLs, authentication problems, or unrecognized formats. Addressing these technical aspects can often resolve the issue without the need for more drastic measures such as restarting the system or changing to unstructured responses, which may not resolve the underlying issue effectively. This methodical approach helps maintain system integrity and efficiency, ensuring that the retriever can perform its function of retrieving data accurately.