LangChain Outage History
LangChain is up right nowPingoru has recorded 55 incidents for LangChain: 55 in the last 12 months and 14 in the last 90 days.
Show as a table
| Month | Incidents | Hours with an open incident |
|---|---|---|
| April 2026 | 4 | 9 of 720 (1%) |
| May 2026 | 8 | 37 of 744 (5%) |
| June 2026 | 6 | 9 of 720 (1%) |
| July 2026 | 5 | 1 of 744 (0%) |
| August 2026 | 5 | 29 of 744 (4%) |
| September 2026 | 3 | 7 of 720 (1%) |
| October 2026 | 6 | 272 of 565 (48%) |
Incidents, newest first
Minor October 14, 2026 Sandbox Performance Degraded 8d 15h LangSmith Sandboxes
Started Oct 14, 2026, 07:47 PM UTC· resolved Oct 23, 2026, 11:18 AM UTC
- investigating Oct 14, 2026, 07:47 PM UTC
Following a caching change sandbox performance is experiencing some degradation. We are investigating.
- monitoring Oct 14, 2026, 08:08 PM UTC
We've identified the issue as a bad host and resolved. Monitoring for any abnormalities.
- resolved Oct 23, 2026, 11:18 AM UTC
The bad host has been removed from the fleet and we aren’t seeing any issues.
Minor October 12, 2026 Seeing some issues logging into the application 2d 10h LangSmith Application
Started Oct 12, 2026, 05:42 AM UTC· resolved Oct 14, 2026, 04:02 PM UTC
- investigating Oct 12, 2026, 05:42 AM UTC
Some users can't log in to or sign up for LangSmith right now. Login attempts may time out or fail. Users who are already logged in should not be affected. We are actively investigating and will post another update as we learn more.
- monitoring Oct 12, 2026, 06:10 AM UTC
We were having an issue with our captcha provider. For now we have disabled captcha which has resolved the issue
- resolved Oct 14, 2026, 04:02 PM UTC
Underlying captcha issue has been resolved.
Minor October 8, 2026 LLM Gateway service interruption –
Started Oct 08, 2026, 07:42 AM UTC· resolved Oct 08, 2026, 07:42 AM UTC
- resolved Oct 08, 2026, 07:42 AM UTC
LLM Gateway is not servicing incoming requests due to internal misconfiguration.
- resolved Oct 08, 2026, 09:31 AM UTC
Incident resolved.
- resolved Oct 08, 2026, 09:34 AM UTC
Update
Minor October 3, 2026 LangSmith Deployment Database Provisioning Error 5h 3m LangSmith Deployments Control Plane
Started Oct 03, 2026, 05:10 AM UTC· resolved Oct 03, 2026, 10:13 AM UTC
- investigating Oct 03, 2026, 05:10 AM UTC
Creation of new LangSmith deployment dedicated instances are failing during database provisioning because of an issue with an upstream cloud provider. Only GCP regions are affected.
- investigating Oct 03, 2026, 05:55 AM UTC
Creating new deployments and new revisions for dedicated instances is failing for LangSmith Deployment in all GCP regions due to an issue with an upstream cloud provider. Existing deployments continue to run and serve traffic.
- identified Oct 03, 2026, 06:46 AM UTC
Issue has been identified, attempted mitigation is being deployed.
- resolved Oct 03, 2026, 10:13 AM UTC
This is now resolved.
Minor September 4, 2026 Thread-scoped sandbox initialization timeouts on new agents 2h 18m LangSmith Fleet
Started Sep 04, 2026, 05:19 PM UTC· resolved Sep 04, 2026, 07:38 PM UTC
- investigating Sep 04, 2026, 05:19 PM UTC
This is impacting the creation of new agents with a computer per thread configuration
- identified Sep 04, 2026, 06:12 PM UTC
We have identified the cause and are working on resolving the issue.
- monitoring Sep 04, 2026, 07:31 PM UTC
The fix has been deployed. All systems are operational
- resolved Sep 04, 2026, 07:38 PM UTC
All systems are operational
Minor September 2, 2026 Agent-scoped sandbox fails to initialize on new agents 3h 42m LangSmith Fleet
Started Sep 02, 2026, 05:04 PM UTC· resolved Sep 02, 2026, 08:47 PM UTC
- investigating Sep 02, 2026, 05:04 PM UTC
This affects only newly created agents with a shared computer.
- identified Sep 02, 2026, 05:59 PM UTC
We have identified the root cause of this incident and are actively working on a fix. The issue originates from a recent change to how sandbox slugs are generated in our backend systems, which now derive slugs directly rather than referencing sandbox IDs. This has introduced a mismatch between the values returned by the backend and those the frontend expects. We will share a further update as remediation progresses.
- monitoring Sep 02, 2026, 08:32 PM UTC
The fix has been deployed. All systems are operational
- resolved Sep 02, 2026, 08:47 PM UTC
All systems are operational
Minor September 1, 2026 Elevated error rate for bulk exports 34m LangSmith Bulk Exports
Started Sep 01, 2026, 07:43 PM UTC· resolved Sep 01, 2026, 08:17 PM UTC
- investigating Sep 01, 2026, 07:43 PM UTC
We are investigating an elevated error rate for bulk exports executions. Bulk exports are currently delayed. New bulk exports can still be created.
- monitoring Sep 01, 2026, 07:53 PM UTC
We have mitigated the issue and have seen recovery. We're continuing to monitor.
- resolved Sep 01, 2026, 08:17 PM UTC
This incident has been resolved.
Minor August 26, 2026 Fetching traces timing out 36m
Started Aug 26, 2026, 04:16 PM UTC· resolved Aug 26, 2026, 04:53 PM UTC
- investigating Aug 26, 2026, 04:16 PM UTC
We are currently investigating an issue where some trace loads are timing out
- investigating Aug 26, 2026, 04:26 PM UTC
Currently dealing with some heavy queries causing issues fetching traces. We are scaling out our system which should remediate.
- investigating Aug 26, 2026, 04:27 PM UTC
This is primarily affecting run querying
- monitoring Aug 26, 2026, 04:42 PM UTC
We've identified the query causing problems to our systems and have pushed a mitigation. All systems look recovered but we are monitoring for any other problems.
- resolved Aug 26, 2026, 04:53 PM UTC
A pathological query was impacting other query services. We've added protections against the pathological case and scaled up our query services. All services are now functioning as normal
Minor August 20, 2026 [GCP US only] LangSmith Deployments Builds Outage 2h 37m LangSmith Deployments Control Plane
Started Aug 20, 2026, 03:54 PM UTC· resolved Aug 20, 2026, 06:32 PM UTC
- investigating Aug 20, 2026, 03:54 PM UTC
Builds for new revisions of LangSmith Deployments are not being processed.
- monitoring Aug 20, 2026, 04:30 PM UTC
Builds are being processed. Validating recovery.
- identified Aug 20, 2026, 05:05 PM UTC
GCP is having an incident in us-west-1. Deployments may experience issues deploying new revisions.
- monitoring Aug 20, 2026, 05:54 PM UTC
New revisions are being processed normally. Validating recovery.
- resolved Aug 20, 2026, 06:32 PM UTC
New revisions are deploying correctly.
Minor August 6, 2026 Partial ingestion failures for traces with large payloads 16h 37m
Started Aug 06, 2026, 03:03 PM UTC· resolved Aug 07, 2026, 07:40 AM UTC
- identified Aug 06, 2026, 03:03 PM UTC
Traces including large payloads might currently fail to be ingested or can be delayed. We are working on a fix.
- identified Aug 06, 2026, 03:33 PM UTC
Updated affected regions
- monitoring Aug 06, 2026, 04:43 PM UTC
The service is temporarily patched. Large payloads are now ingested normally.
- resolved Aug 07, 2026, 07:40 AM UTC
The full fix took an extraordinarily long time to release due to an outage at our CI provider. In the meantime, the mitigation we had deployed mitigated the problem.
Minor August 5, 2026 Agent tool calls failing on Anthropic Claude models 6h 25m LangSmith Fleet
Started Aug 05, 2026, 03:27 PM UTC· resolved Aug 05, 2026, 09:52 PM UTC
- investigating Aug 05, 2026, 03:27 PM UTC
We're investigating an issue where agents and workflows using Anthropic Claude models with custom tools may fail to complete runs. Affected requests return a tool input validation error. We'll share more information as we have it.
- identified Aug 05, 2026, 06:36 PM UTC
We're seeing elevated error rates when using Fleet with Claude models and certain MCP tools
- monitoring Aug 05, 2026, 08:21 PM UTC
We're seeing elevated error rates when using Fleet with Claude models and certain MCP tools.
- resolved Aug 05, 2026, 09:52 PM UTC
Resolved. Fix is now deployed that skips an unsupported tool schema and logs a warning instead of failing the request.
Minor August 3, 2026 High latencies and increased rate of 500s for analytical queries (stats and dashboards) 2h 57m
Started Aug 03, 2026, 06:15 PM UTC· resolved Aug 03, 2026, 09:13 PM UTC
- investigating Aug 03, 2026, 06:15 PM UTC
We are aware of an issue causing high latency and intermittent HTTP 500 errors for analytical queries (Stats and Dashboards) in LangSmith. Our team is actively investigating and working on a resolution.
- investigating Aug 03, 2026, 06:20 PM UTC
We are aware of an issue causing high latency and intermittent HTTP 500 errors for analytical queries (Stats and Dashboards) in LangSmith. Our team is actively investigating and working on a resolution.
- monitoring Aug 03, 2026, 07:49 PM UTC
We have identified the root cause, mitigated the issue, and are actively monitoring the service to ensure continued stability.
- resolved Aug 03, 2026, 09:13 PM UTC
The issue has been resolved, and service has returned to normal. We identified the root cause, implemented a mitigation, and have observed stable system performance following the change. We will continue to monitor the service closely to ensure ongoing stability. Thank you for your patience while we worked to resolve this issue.
Minor July 17, 2026 Build failure on new revisions – LangSmith Deployments Control Plane
Started Jul 17, 2026, 12:09 AM UTC· resolved Jul 17, 2026, 12:09 AM UTC
- identified Jul 16, 2026, 11:22 PM UTC
New revisions for Github backed projects are failing. This is due to an ongoing Github incident.
- resolved Jul 17, 2026, 12:09 AM UTC
The Github incident has resolved. New revisions are being processed correctly.
Minor July 12, 2026 Ingestion is delayed – LangSmith Run Ingestion
Started Jul 12, 2026, 09:59 PM UTC· resolved Jul 12, 2026, 09:59 PM UTC
- investigating Jul 12, 2026, 09:28 PM UTC
We are seeing some failures in trace ingestion. Ingestion is currently delayed.
- resolved Jul 12, 2026, 09:59 PM UTC
All systems seem fully recovered. Ingestion was down for approximately 30 minutes from 5pm EST to 530 EST. Traces from that period are still being being processed but there was no data loss.
Minor July 9, 2026 Elevated Errors in Fleet – LangSmith Fleet
Started Jul 09, 2026, 12:22 AM UTC· resolved Jul 09, 2026, 12:22 AM UTC
- investigating Jul 09, 2026, 12:09 AM UTC
We're investigating an issue affecting Fleet where users are unable to interact with their agents. Our team is actively working on a fix and will provide updates as we learn more.
- monitoring Jul 09, 2026, 12:21 AM UTC
We've deployed a fix and are seeing error rates return to normal. We're monitoring Fleet closely to confirm full recovery.
- resolved Jul 09, 2026, 12:22 AM UTC
The issue affecting Fleet has been resolved, and users can interact with their agents normally again. Thanks for your patience.
Minor June 10, 2026 Performance degradation of legacy storage cluster – LangSmith API, LangSmith Application
Started Jun 10, 2026, 01:49 PM UTC· resolved Jun 10, 2026, 01:49 PM UTC
- investigating Jun 10, 2026, 12:41 PM UTC
We are experiencing a performance degradation in one of our legacy storage clusters after a recent version update. This could lead to timeouts when querying trace information. Work is underway to revert the update. Ingestion of trace data is not impacted.
- monitoring Jun 10, 2026, 01:39 PM UTC
The rollback of the legacy storage cluster is mostly complete, and request latencies have largely normalized.
- resolved Jun 10, 2026, 01:49 PM UTC
The rollback is complete, and our latency readings are back to nominal levels.
Minor June 7, 2026 Elevated LangSmith API error rate – LangSmith API, LangSmith Application
Started Jun 07, 2026, 10:08 AM UTC· resolved Jun 07, 2026, 10:08 AM UTC
- investigating Jun 07, 2026, 09:50 AM UTC
We are investigating elevated error rates in the LangSmith API.
- monitoring Jun 07, 2026, 09:54 AM UTC
We've mitigated the issue and are seeing initial recovery and are continuing to monitor.
- resolved Jun 07, 2026, 10:08 AM UTC
This incident has been resolved.
Minor June 6, 2026 Billing usage ingestion delays – LangSmith Billing
Started Jun 06, 2026, 02:08 AM UTC· resolved Jun 06, 2026, 02:08 AM UTC
- identified Jun 05, 2026, 06:38 PM UTC
We have identified an issue causing delays in billable usage tracking for LangSmith Deployments.
- monitoring Jun 06, 2026, 12:23 AM UTC
We have a fix in place and are processing the backlog of usage.
- resolved Jun 06, 2026, 02:08 AM UTC
The backlog has completed processing. This incident is resolved.
Minor May 27, 2026 Bulk exports not being processed – LangSmith API
Started May 27, 2026, 03:38 PM UTC· resolved May 27, 2026, 03:38 PM UTC
- investigating May 27, 2026, 12:09 PM UTC
We're currently investigating an issue causing a number of bulk exports to become stuck.
- monitoring May 27, 2026, 01:32 PM UTC
A fix has been successfully deployed and bulk exports are succeeding again. The team continue to monitor for any further issues.
- resolved May 27, 2026, 03:38 PM UTC
No further issues have been observed and this incident is now considered resolved.
Minor May 22, 2026 Sandbox create failing – LangSmith Sandboxes
Started May 22, 2026, 05:29 PM UTC· resolved May 22, 2026, 05:29 PM UTC
- investigating May 22, 2026, 04:35 PM UTC
All sandbox create calls error
- identified May 22, 2026, 05:15 PM UTC
Fix is rolling out
- monitoring May 22, 2026, 05:16 PM UTC
Creates succeeding again
- resolved May 22, 2026, 05:29 PM UTC
Resolved
Minor May 16, 2026 Bulk export failures – LangSmith API
Started May 16, 2026, 12:38 AM UTC· resolved May 16, 2026, 12:38 AM UTC
- investigating May 14, 2026, 04:53 PM UTC
We're currently investigating an issue causing some bulk exports to fail or become stuck.
- identified May 15, 2026, 01:27 AM UTC
The team have identified the issue and a fix is being deployed.
- monitoring May 15, 2026, 02:51 AM UTC
The fix has been successfully deployed and bulk exports are succeeding again. The team continue to monitor for any further issues.
- investigating May 15, 2026, 01:55 PM UTC
Unfortunately we continue to see a number of bulk export jobs failing. The team are investigating the cause.
- resolved May 16, 2026, 12:38 AM UTC
This incident has been resolved.
Minor May 13, 2026 Increased latency in LangSmith API backend – LangSmith Run Ingestion, LangSmith API, LangSmith Application
Started May 13, 2026, 02:00 PM UTC· resolved May 13, 2026, 02:00 PM UTC
- investigating May 13, 2026, 12:58 PM UTC
We are investigating an increase in backend latency in the LangSmith service.
- identified May 13, 2026, 01:44 PM UTC
We identified a database modification that came through our regular release pipeline and caused backend contention, resulting in overall slowness in our API and WebUI.
- resolved May 13, 2026, 02:00 PM UTC
The issue is now fully resolved. All services are restored and fully operational.
Minor April 30, 2026 LangSmith UI: ongoing incident — trace visualization unavailable – LangSmith Application
Started Apr 30, 2026, 06:30 PM UTC· resolved Apr 30, 2026, 06:30 PM UTC
- investigating Apr 30, 2026, 02:59 PM UTC
We're currently investigating an incident affecting trace visualization in the LangSmith UI. Traces may not render correctly or may fail to load.
- identified Apr 30, 2026, 03:33 PM UTC
We have identified the root cause and are working on a fix.
- monitoring Apr 30, 2026, 04:19 PM UTC
We have deployed a fix and are continuing to monitor the situation closely. Trace ingestion was not impacted. We apologize for the inconvenience.
- resolved Apr 30, 2026, 06:30 PM UTC
The fix has been properly released. Thank you for your patience and sorry for the inconvenience.
Minor April 28, 2026 Annotation run view performance degradation – LangSmith Application
Started Apr 28, 2026, 02:25 PM UTC· resolved Apr 28, 2026, 02:25 PM UTC
- investigating Apr 28, 2026, 08:44 AM UTC
We're investigating an issue where the annotation queue page may load very slowly or even freeze the UI after clicking the View Run button.
- identified Apr 28, 2026, 11:25 AM UTC
The cause of the issue has been identified and the team is currently working on a fix.
- resolved Apr 28, 2026, 02:25 PM UTC
This incident has been resolved. Annotation queues are once again fully accessible in the US LangSmith UI. Please let us know at [email protected] if you're still experiencing issues.
Minor March 16, 2026 LangSmith Deployments outage – LangSmith Deployments Data Plane, LangSmith Deployments Control Plane
Started Mar 16, 2026, 02:11 PM UTC· resolved Mar 16, 2026, 02:11 PM UTC
- investigating Mar 16, 2026, 10:02 AM UTC
We're currently investigating an issue causing deployment failures.
- identified Mar 16, 2026, 10:41 AM UTC
The issue is impacting the LangSmith Deployments Control Plane. A fix is being deployed now.
- monitoring Mar 16, 2026, 10:47 AM UTC
A fix for this issue has been deployed. The team continue to monitor system health.
- resolved Mar 16, 2026, 02:11 PM UTC
The fix was successful and this issue is now considered resolved.