Bulk update handles "document_missing_in_index_exception"

[jonavellecuerdo]

Purpose and background context

This required update was identified in the process of investigating missing TIMDEX embeddings for gismit and aspace. This fix addresses the missing embeddings for gismit. Please read the details in TIMX-642 for a summary of the issue.

One might wonder--as I did 🤓 --the difference between the document_missing_exception vs document_missing_in_index exception. The screenshot in TIMX-642 showing the document_missing_in_index exception was reindexing to AOSS (Serverless) and the screenshot below is reindexing to Cluster (Traditional):

This suggests that the document_missing_in_index is specific to AOSS and it is an artifact of differing OpenSearch versions used by AOSS (Serverless) vs. Cluster (Traditional). While we are supporting two OpenSearch instances, we will need to handle both error types.

How can a reviewer manually see the effects of these changes?

Screenshots in TIMX-642 and above for the gismit explain the issue.

Includes new or updated dependencies?

NO

Changes expectations for external applications?

YES-ish: The TIMDEX dataset in Prod was synced to Dev on 2026-07-14 (yesterday). The TIMDEX dataset in Prod will still be missing embeddings for gismit and aspace until we regenerate embeddings as was done in Dev.

What are the relevant tickets?

• https://mitlibraries.atlassian.net/browse/TIMX-642

Code review

• Code review best practices are documented here and you are encouraged to have a constructive dialogue with your reviewers about their preferences and expectations.