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Outage in Crossref

Metadata indexing failure and instability on the REST API (Starting Friday 12th 20:00 UTC and continuing) affecting several other tools

Resolved Minor
September 15, 2025 - Started 5 months ago - Lasted 17 days
Official incident page

Incident Report

We have found that some records failed to be indexed by the REST API on Friday 12th September, and continuing. Our technical team is investigating.

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Latest Updates ( sorted recent to last )
RESOLVED 5 months ago - at 10/02/2025 03:31PM

We have updated the service that synchronises new and updated metadata records with the REST API; all three pools of the REST API are performing well as a result (as are the services that run on it). Thus, we are resolving this incident. -IF

IDENTIFIED 5 months ago - at 09/26/2025 01:59PM

We've identified and fixed one issue which was affecting citation counts. We're still working on two additional tasks: upgrading Elasticsearch in the REST API and updating the service that synchronises new and updated metadata records with the REST API. -GH

IDENTIFIED 5 months ago - at 09/23/2025 01:26PM

The public and polite pools are still experiencing some instability, which is affecting downstream tools such as Participation Reports, Search, and Crossmark. We're working on a fix incl. infrastructure upgrades that should help long-term.
-GH

MONITORING 5 months ago - at 09/22/2025 07:08PM

We are continuing to monitor for any further issues.

MONITORING 5 months ago - at 09/19/2025 10:15AM

The public and polite pools are still showing as unstable with long response times and timeouts occurring. We are still looking into this as a priority and will post with more information as we know it.

MONITORING 5 months ago - at 09/17/2025 12:48PM

A fix has been implemented and we are monitoring the results. Do to the heavy workload of indexing a large volume of records yesterday, we have observed longer response times in the Public and Polite pools of the REST API. We believe those response times should improve throughout the day. -IF

INVESTIGATING 5 months ago - at 09/16/2025 02:14PM

Our technical team is re-pushing all of the records that have failed to be indexed since Friday, 12 September. Those records should be indexed in the REST API in the next 24 hours. -IF

INVESTIGATING 5 months ago - at 09/15/2025 04:33PM

We are continuing to investigate this issue.

INVESTIGATING 5 months ago - at 09/15/2025 09:13AM

We have found that some records failed to be indexed by the REST API on Friday 12th September, and continuing. Our technical team is investigating.

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