Dagster Outage History
Dagster is up right nowDagster had 14 outages in the last 2 years totaling 26h 24m of downtime — averaging 0.6 incidents per month.
There were 14 Dagster outages since October 24, 2024 totaling 26h 24m of downtime. Each is summarised below — incident details, duration, and resolution information.
Serverless tasks failing to start
Affected: API
Timeline · 2 updates
- monitoring Apr 29, 2026, 06:16 PM UTC
We observed an increase in Dagster+ serverless runs failing to start between 10:50AM and 11:00AM PST. Our cloud provider indicated an incident on their end which we have linked to these issues. Failure rate has since gone back down, we will post more information as we learn more.
- resolved Apr 29, 2026, 07:28 PM UTC
The underlying issue has been resolved.
Scheduling runs and sensors delay
Timeline · 1 update
- resolved Feb 24, 2026, 12:33 AM UTC
A configuration change caused an delay in scheduling runs and sensors. We identified and fixed the issue. The issue was identified at 12:15pm PST and was resolved at 1:30pm PST.
Some users seeing an older version of the Dagster+ UI
Affected: Dagster Cloud UI
Timeline · 2 updates
- investigating Nov 18, 2025, 02:04 PM UTC
We're investigating an issue where some users are seeing a version of the old Dagster+ UI. We've identified the root cause of the problem and are investigating a fix.
- resolved Nov 18, 2025, 02:53 PM UTC
This issue has now been resolved - all users should now be seeing the new Dagster+ UI again.
Elevated API latency
Timeline · 1 update
- resolved Jul 02, 2025, 07:01 PM UTC
We observed some DNS resolution related API latency and errors from 10:10pm-10:35pm EST. We've identified the issue and have released a fix.
The intermittant issues have been fixed.
Timeline · 2 updates
- monitoring Jun 27, 2025, 06:56 PM UTC
We observed some API latency and errors from 2:15pm-2:45pm EST. We've identified the issue and have released a fix.
- resolved Jun 27, 2025, 06:58 PM UTC
This issue has now been resolved.
Impact of GCP incident
Timeline · 2 updates
- monitoring Jun 12, 2025, 06:59 PM UTC
GCP is reporting degraded status for a number of services: https://status.cloud.google.com Dagster+ is largely unaffected. Users using Google to authenticate to Dagster+ may see issues with sign in and authentication. We'll continue to monitor and update with any other Dagster+ related impact.
- resolved Jun 13, 2025, 01:08 AM UTC
This incident has been resolved.
Dagster+ UI errors
Affected: Dagster Cloud UI
Timeline · 3 updates
- investigating Apr 24, 2025, 06:11 PM UTC
We're investigating an uptick in Dagster+ UI errors beginning at 10:40PT.
- monitoring Apr 24, 2025, 06:19 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Apr 24, 2025, 06:31 PM UTC
This incident has been resolved.
Some users cannot access catalog UI
Affected: Dagster Cloud UI
Timeline · 4 updates
- investigating Mar 27, 2025, 10:51 AM UTC
We detected errors for some users when accessing the catalog Dagster+ UI. Using incognito mode in the browser solves it. We are currently investigating the problem to provide fast mitigation.
- identified Mar 27, 2025, 11:53 AM UTC
Issue was identified and a fix is currently being worked on.
- monitoring Mar 27, 2025, 12:24 PM UTC
A fix was deployed and we are monitoring the situation.
- resolved Mar 27, 2025, 02:21 PM UTC
This incident has been resolved.
Some Dagster+ Serverless Runs Failing to Start
Timeline · 1 update
- resolved Mar 23, 2025, 10:50 PM UTC
Between 11:30 AM PST and 12:15 PM PST on Sunday, March 23rd, some Dagster+ Serverless runs failed to start with a “run worker failed” error. We are working with our cloud provider to investigate the root cause.
Dagster UI down for multiple users
Affected: Dagster Cloud UI
Timeline · 6 updates
- investigating Feb 27, 2025, 09:27 AM UTC
We've received reports from multiple users having trouble accessing the Dagster Cloud UI. Our engineering team is currently investigating.
- investigating Feb 27, 2025, 10:25 AM UTC
We are continuing to investigate this issue.
- investigating Feb 27, 2025, 10:51 AM UTC
We have rolled out a fix and are monitoring service restoration. The Dagster+ UI is available again. STDERR and STDOUT tabs on runs are temporarily disabled.
- monitoring Feb 27, 2025, 10:52 AM UTC
We have rolled out a fix and are monitoring service restoration. The Dagster+ UI is available again. STDERR and STDOUT tabs on runs are temporarily disabled.
- resolved Feb 27, 2025, 11:29 AM UTC
The Dagster+ UI is restored. Agents, runs, and automations are not affected. We will continue to work to restore STDOUT and STDERR in the UI during US business hours. In the meantime, compute logs will continue to upload but will not be accessible via the UI. [UPDATE 1:10 pm EST] STDERR and STDOUT are available again in the UI for all users.
- postmortem Mar 07, 2025, 09:12 PM UTC
In addition to [structured event logs](https://docs.dagster.io/guides/monitor/logging/#structured-event-logs) that appear in the Dagster UI, Dagster supports [raw compute logs](https://docs.dagster.io/guides/monitor/logging/#raw-compute-logs) to capture STDERR and STDOUT. During the affected window, a fault in our compute log download process resulted in timeouts and diminished responsiveness of our web servers. We mitigated the issue by temporarily disabling compute log downloads before adjusting compute log behavior so that the conditions that led to the failure are no longer possible. Log functionality has since been fully restored. We've also adjusted our incident process to ensure status pages are posted more quickly in the future. Please reach out if you have additional questions. Thank you for your patience.
Elevated errors in the Dagster+ UI
Timeline · 1 update
- resolved Feb 14, 2025, 03:38 PM UTC
"Between 7:05AM PST and 7:25AM PST there were elevated errors while accessing the Dagster+ UI. The cause of the errors has been identified and fixed and the problem should now be resolved"
Issues with global op concurrency keys
Affected: APIDagster Cloud UI
Timeline · 3 updates
- identified Feb 07, 2025, 03:37 PM UTC
Some runs containing ops tagged with concurrency keys that have not been configured explicitly or with a default limit are getting blocked. Separately, there are some UI issues affecting the concurrency key settings page. We have identified fixes for these and are in the process of rolling them out.
- monitoring Feb 07, 2025, 03:56 PM UTC
The fixes has been rolled out and previously blocked runs appear to be progressing. We are continuing to monitor for any issues. The previous blocked runs should progress with their step execution, but may not reach a terminal state and may need to be manually terminated.
- resolved Feb 07, 2025, 04:11 PM UTC
This incident has been resolved.
Degraded Dagster+ UI performance
Affected: Dagster Cloud UI
Timeline · 4 updates
- investigating Oct 24, 2024, 07:55 PM UTC
Some users are seeing degradations loading the Dagster+ UI. We are investigating and working on a fix.
- identified Oct 24, 2024, 08:12 PM UTC
We've identified the issue and are working on a fix.
- monitoring Oct 24, 2024, 08:58 PM UTC
We have rolled out a fix.
- resolved Oct 24, 2024, 09:05 PM UTC
This incident has been resolved.