Update - We are continuing to investigate this issue.
Oct 21, 13:00 UTC
Update - We are continuing to investigate this issue which also includes the Polite REST API pool which participation reports and other tools use
Oct 21, 12:59 UTC
Investigating - Participation reports are currently down and we're investigating as soon as we can.
Oct 21, 12:56 UTC
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 from Turnitin - status found at https://turnitin.statuspage.io/ ? Operational
AWS cloudfront Operational
Meta Operational
deliberately-unreliable server ? Operational
Demo Auth ? Operational
Beta Operational
Metadata Manager ? Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance
Public REST API Response Time
Fetching
Public REST API Uptime
Fetching
Polite REST API Response Time
Fetching
Polite REST API Uptime
Fetching
Plus REST API Response Time
Fetching
Plus REST API Uptime
Fetching
Plus OAI-PMH Response Time
Fetching
Plus OAI-PMH Uptime
Fetching
OpenURL Response Time
Fetching
OpenURL Uptime
Fetching
Content Negotiation Response Time
Fetching
Content Negotiation Uptime
Fetching
Crossmark Response Time
Fetching
Crossmark Uptime
Fetching
Event Data Query API Response Time
Fetching
Event Data Query API Uptime
Fetching
Crossref Metadata Search
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Past Incidents
Oct 24, 2021

No incidents reported today.

Oct 23, 2021

No incidents reported.

Oct 22, 2021

No incidents reported.

Oct 21, 2021
Completed - Hardware testing is complete. There were 3 brief outages during the testing where Crossref services were not available.
Oct 21, 20:58 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Oct 21, 19:00 UTC
Scheduled - We will be performing hardware testing at our data center on Thursday, 21 October from 1900 to 2100 UTC. While we're hopeful there will be no downtime, users may experience intermittent outages during this window of time.
Oct 19, 15:14 UTC
Completed - The scheduled maintenance has been completed.
Oct 21, 17:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Oct 21, 15:01 UTC
Scheduled - Unfortunately we discovered a few problems with release v0.100.0 and had to roll it back. We will therefore be undergoing unscheduled maintenance today (Thursday 21 October) from 1500 to 1700 UTC for release v0.100.1

Our members may experience delays in deposit system admin tool (doi.crossref.org) processing. Deposits submitted during this time will be stored and processed after the maintenance has been completed
Oct 21, 13:57 UTC
Resolved - The issue has been resolved and the queue looks back to normal once more.
Oct 21, 08:05 UTC
Identified - The issue has been identified and a fix is being implemented.
Oct 20, 19:34 UTC
Investigating - We are still investigating the root cause of these submission processing delays.
Oct 20, 17:43 UTC
Monitoring - A fix has been implemented, and submission processing has resumed at doi.crossref.org. We continue to monitor.
Oct 18, 17:44 UTC
Update - We have suspended the queue and are restarting the database and all processing threads. We continue to accept submissions during this time, but processing will be delayed.
Oct 18, 15:36 UTC
Update - We're suspending the queue shortly to address the issue of stalling threads. We'll continue to accept your submissions during this time, but there will be a processing lag as a result.
Oct 18, 14:51 UTC
Investigating - Over the course of the last week, we've had a few instances of submission processing threads stalling. We have another example of this today. We're investigating the underlying issue. We continue to accept and process submissions during this time, but this recurring issue continues to result in slower processing times.
Oct 18, 14:30 UTC
Monitoring - A fix has been implemented and we are monitoring the results.
Oct 15, 17:09 UTC
Investigating - We look to have stalled processing threads in the admin tool (doi.crossref.org) causing additional delays at the moment. We're investigating.
Oct 15, 14:20 UTC
Update - We have re-enabled the queue. Submissions are now processing. Yay! We continue to monitor the queue and your submissions.
Oct 13, 17:03 UTC
Update - We will be pausing the submission queue (doi.crossref.org) shortly to remove ~10,000 submissions that one of our members flagged as containing metadata errors. All submissions sent to us during this time will be stored and processed as soon as the erroneous submissions have been removed and the queue reactivated.
Oct 13, 16:32 UTC
Monitoring - A fixed has been implemented. Submissions are now processing in our admin tool (doi.crossref.org). We continue to monitor the results.
Oct 12, 20:43 UTC
Identified - The issue has been identified and a fix is being implemented.
Oct 12, 19:49 UTC
Investigating - We look to have stalled processing threads in the admin tool (doi.crossref.org) causing additional delays. We're investigating.
Oct 12, 19:16 UTC
Monitoring - Submission processing in the queue is in much better shape today than last week. We have ~27,000 pending submissions in the queue - as of this writing - compared to 75,000+ at several points last week. The current issue is that several users have very large file sizes for book registrations and reference list updates working their way through the queue (these larger submissions require more time for us to match references against and process). Given the logic in submission processing in the queue, those larger submissions are largely affecting other larger submissions. Instead of a general backlog, like we had last week, we currently have a backlog in submissions of very large file sizes. Thankfully, for members submitting smaller file sizes, you will likely not notice any significant lags in submission processing.
Oct 11, 19:35 UTC
Identified - Due to yesterday's outage - https://www.crossref.org/blog/outage-of-october-6-2021/ - we will need to reprocess all submissions that were processed between 1400 and 1900 UTC yesterday, 6 October. This will result in additional submissions into the queue, which is already delayed. We will be begin reprocessing these submissions imminently.
Oct 7, 17:14 UTC
Monitoring - A fix has been implemented and we are monitoring the results.
Oct 4, 18:16 UTC
Identified - The issue has been identified and a fix is being implemented.
Oct 4, 14:49 UTC
Investigating - Processing of submissions in the admin tool (doi.crossref.org) is slower than we would like today. We are storing all submissions sent to us and are processing them as fast as we can, but there is a noticeable backlog at the moment. We're investigating.
Oct 4, 14:29 UTC
Oct 20, 2021
Oct 19, 2021

No incidents reported.

Oct 18, 2021
Resolved - This incident has been resolved.
Oct 18, 14:00 UTC
Monitoring - Our REST API Polite pool and Participation Reports were down for an hour from around 1020 UTC today, but are operational again now.

Those using the REST API Public or Plus pools were unaffected.

The team are investigating the cause and we'll update with more information as soon as we have it.
Oct 18, 11:28 UTC
Oct 17, 2021

No incidents reported.

Oct 16, 2021

No incidents reported.

Oct 15, 2021
Oct 14, 2021

No incidents reported.

Oct 13, 2021
Completed - The scheduled maintenance has been completed.
Oct 13, 17:00 UTC
Verifying - Verification is currently underway for the maintenance items.
Oct 13, 16:16 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Oct 13, 16:00 UTC
Scheduled - On 13 October, we will be making backend changes to our content negotiation service, effectively folding it into our REST API. While behavior should be unchanged for requests made according to the specification, there are a few functional changes to note.
1) The resolver URL will change from http://data.crossref.org to https://api.crossref.org
2) Content negotiation responses will be returned by one of our three API pools depending on whether you include mailto identification in your user agent header for the polite pool, or include a token for Metadata Plus subscribers accessing the Plus pool. All other requests will be serviced by the public pool.
Oct 12, 18:26 UTC
Oct 12, 2021
Completed - The scheduled maintenance has been completed.
Oct 12, 15:11 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Oct 12, 14:00 UTC
Scheduled - We will be undergoing scheduled maintenance - release v0.100.0 - on Tuesday, 12 October from 1400 to 1600 UTC. Our members may experience delays in deposit system admin tool (doi.crossref.org) processing. Deposits submitted during this time will be stored and processed after the maintenance has been completed.
Oct 11, 15:41 UTC
Oct 11, 2021
Resolved - Missing events from yesterday are now back in Event Data, so we're resolving the incident.
Oct 11, 11:53 UTC
Monitoring - Event Data is now adding new events again. We'll continue monitoring to make sure any missed events have been successfully added.
Oct 10, 17:44 UTC
Investigating - The Event Data service has been having problems adding new events to the API since 0115 UTC today. The API itself is stable, but new events are not being added. Our team are investigating and we’ll update as soon as we know more.
Oct 10, 16:16 UTC
Oct 10, 2021