All Systems Operational
APIs Operational
Public REST API ? Operational
Polite REST API ? Operational
OAI-PMH ? Operational
XML API ? Operational
Event Data Query API ? Operational
OpenURL ? Operational
Crossmark dialog server ? Operational
Content negotiation ? Operational
Metadata Plus Operational
Plus REST API ? Operational
Plus OAI-PMH ? Operational
XML Snapshots ? Operational
JSON Snapshots ? Operational
Sites Operational
Crossref website ? Operational
Crossref support ? Operational
Metadata search ? Operational
Participation Reports ? Operational
Content Registration Operational
Admin tool ? Operational
Test admin tool ? Operational
External dependencies Operational
Handle servers ? Operational
Similarity Check via iThenticate (Turnitin) status found at turnitin.status.io ? Operational
AWS cloudfront Operational
Meta Operational
deliberately-unreliable server ? Operational
Beta Operational
Metadata Manager ? Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance
Scheduled Maintenance
26 January - weekly maintenance, release v0.73.0 Jan 26, 16:00-18:00 UTC
We will be undergoing scheduled maintenance - release v0.73.0 - on Tuesday, 26 January from 1600 to 1800 UTC. Our members may experience delays in deposit system admin (doi.crossref.org) and Metadata Manager (crossref.org/metadatamanager) processing. Deposits submitted during this time will be stored and processed after the maintenance has been completed.
Posted on Jan 25, 17:24 UTC
System Metrics Month Week Day
Public REST API Response Time
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Public REST API Uptime
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Polite REST API Response Time
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Polite REST API Uptime
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Plus REST API Response Time
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Plus REST API Uptime
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Plus OAI-PMH Response Time
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Plus OAI-PMH Uptime
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OpenURL Response Time
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OpenURL Uptime
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Content Negotiation Response Time
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Content Negotiation Uptime
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Crossmark Response Time
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Crossmark Uptime
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Event Data Query API Response Time
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Event Data Query API Uptime
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Past Incidents
Jan 26, 2021

No incidents reported today.

Jan 25, 2021
25 January - scheduled maintenance - updating to haproxy 2.2 and TLS 1.2
Completed - The scheduled maintenance has been completed.
Jan 25, 16:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 25, 14:00 UTC
Scheduled - We will be undergoing scheduled maintenance on Monday, 25 January, from 1400 to 1600 UTC. Users may experience intermittent outages during this time. To strengthen the security of our web servers, we will be updating to haproxy version 2.2 and TLS version 1.2, and disabling TLS versions 1.0 and 1.1.
Jan 20, 18:23 UTC
Jan 24, 2021

No incidents reported.

Jan 23, 2021

No incidents reported.

Jan 22, 2021

No incidents reported.

Jan 21, 2021

No incidents reported.

Jan 20, 2021
Unplanned maintenance release v0.72.0
Completed - The scheduled maintenance has been completed.
Jan 20, 19:28 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 20, 18:16 UTC
Scheduled - Yesterday's scheduled maintenance - release v0.72.0 - failed so we are releasing it today. Our members may experience delays in deposit system admin (doi.crossref.org) and Metadata Manager (crossref.org/metadatamanager) processing now (1800 to 2000 UTC). Deposits submitted during this time will be stored and processed after the maintenance has been completed.
Jan 20, 18:13 UTC
Infrastructure update: Crossref is temporarily downgrading our haproxy version from 2.2 to 1.6
Resolved - We will be upgrading to haproxy version 2.2 on Monday, 25 January. For more information, please follow our maintenance notification specific to that release: https://status.crossref.org/incidents/ftwpm7ztg9n3
Jan 20, 18:29 UTC
Identified - We recently upgraded the version of haproxy we use from 1.6 to 2.2. Unfortunately this has caused a small number of tools to stop working, so we'll be moving back to version 1.6 while we investigate further.

We'll be on haproxy version 1.6 until at least early January. Most users of our tools and services won't notice any difference. However, if you've recently upgraded to TLS1.3 to secure your communications between your servers and web browsers you will need to downgrade back to TLS version 1.2 in the meantime.
Dec 21, 16:23 UTC
Jan 19, 2021
19 January - weekly maintenance, release v0.72.0
Completed - We were unable to complete today's maintenance due to an internal error.
Jan 19, 17:55 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 19, 16:00 UTC
Scheduled - We will be undergoing scheduled maintenance - release v0.72.0 - on Tuesday, 19 January from 1600 to 1800 UTC. Our members may experience delays in deposit system admin (doi.crossref.org) and Metadata Manager (crossref.org/metadatamanager) processing. Deposits submitted during this time will be stored and processed after the maintenance has been completed.
Jan 19, 16:00 UTC
Jan 18, 2021

No incidents reported.

Jan 17, 2021

No incidents reported.

Jan 16, 2021

No incidents reported.

Jan 15, 2021
Processing of deposit submissions (content registration) delayed
Resolved - We've fixed the problem, and made significant progress in reducing the number of pending submissions in the admin tool deposit queue. This incident has been resolved.
Jan 15, 19:09 UTC
Monitoring - A fix has been implemented and we're monitoring it. We're processing your deposit submissions as fast as we can - running additional threads to catch up - but there is still a consider backlog of submissions to work through.
Jan 12, 19:52 UTC
Identified - The issue has been identified and a fix is being implemented.
Jan 12, 18:44 UTC
Update - We'll use the regularly scheduled maintenance window tomorrow, Tuesday, 12 January, at 1600 UTC, to further investigate the underlying issues with query timeout errors and sluggish deposit processing.
As a reminder, deposit processing capacity using all of our submission methods (admin tool: doi.crossref.org; HTTPS POST, OJS, web deposit form, Metadata Manager) is at 75 to 80% of what it normally is. Deposit submission processing remains delayed.
Jan 11, 18:44 UTC
Update - We have found that the problems with deposit processing in our admin tool are related to query timeout errors, which will take more time for us to fix. In order to reduce potential problems over the weekend, we have reduced processing capacity by 20%. Thus, members will likely experience delays in submission processing through Monday, 11 January. We'll provide updates on Monday, 11 January.
Jan 8, 21:05 UTC
Investigating - Processing of deposit submissions using all of our submission methods (admin tool: doi.crossref.org; HTTPS POST, OJS, web deposit form, Metadata Manager) are currently delayed. We're investigating and hope to get back to registering your content ASAP.
Jan 8, 20:38 UTC
Jan 14, 2021

No incidents reported.

Jan 13, 2021
Regenerating January's XML and JSON Metadata Plus Snapshots
Resolved - The JSON and XML Metadata Plus Snapshots have been regenerated and are now available for download for our Metadata Plus users.
Jan 13, 16:16 UTC
Update - We began regenerating both the JSON and XML snaphots on Friday, 8 January. Barring any unforeseen problems, the most recent Metadata Plus snapshots should be available later this week.
Jan 11, 18:47 UTC
Update - We are continuing to work on a fix for this issue.
Jan 8, 00:55 UTC
Identified - The most recent XML Metadata Plus snapshots are a bit delayed this month. As a result, we are going to regenerate both Plus snapshots (JSON and XML). We expect to have them available sometime next week and will update this message when the files are posted.
Jan 7, 21:46 UTC
Jan 12, 2021
12 January - weekly maintenance, release v0.71.0
Completed - The scheduled maintenance has been completed.
Jan 12, 18:43 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 12, 16:00 UTC
Scheduled - We will be undergoing scheduled maintenance - release v0.71.0 - during this time (12 January, 1600 to 1900 UTC). Our members may experience delays in deposit system admin (doi.crossref.org) and Metadata Manager (crossref.org/metadatamanager) processing. Deposits submitted during this time will be stored and processed after the maintenance has been completed.
Jan 11, 18:30 UTC
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