LLM Gateway service interruption
Timeline · 1 update
- resolved Oct 08, 2026, 07:42 AM UTC
Status: Resolved LLM Gateway is not servicing incoming requests due to internal misconfiguration.
LangChain Outage History
LangChain is up right nowLangChain had 35 outages in the last 2 years totaling 5h 3m of downtime — averaging 1.4 incidents per month.
There were 35 LangChain outages since November 14, 2025 totaling 5h 3m of downtime. Each is summarised below — incident details, duration, and resolution information.
LangSmith Deployment Database Provisioning Error
Affected: LangSmith Deployments Control Plane
Timeline · 4 updates
- investigating Oct 03, 2026, 05:10 AM UTC
Status: Investigating 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. Affected components LangSmith Deployments Control Plane (Partial outage)
- investigating Oct 03, 2026, 05:55 AM UTC
Status: Investigating 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. Affected components LangSmith Deployments Control Plane (Partial outage)
- identified Oct 03, 2026, 06:46 AM UTC
Status: Identified Issue has been identified, attempted mitigation is being deployed. Affected components LangSmith Deployments Control Plane (Partial outage)
- resolved Oct 03, 2026, 10:13 AM UTC
Status: Resolved This is now resolved. Affected components LangSmith Deployments Control Plane (Operational)
Thread-scoped sandbox initialization timeouts on new agents
Affected: LangSmith Fleet
Timeline · 4 updates
- investigating Sep 04, 2026, 05:19 PM UTC
Status: Investigating This is impacting the creation of new agents with a computer per thread configuration Affected components LangSmith Fleet (Degraded performance)
- identified Sep 04, 2026, 06:12 PM UTC
Status: Identified We have identified the cause and are working on resolving the issue. Affected components LangSmith Fleet (Degraded performance)
- monitoring Sep 04, 2026, 07:31 PM UTC
Status: Monitoring The fix has been deployed. All systems are operational Affected components LangSmith Fleet (Operational)
- resolved Sep 04, 2026, 07:38 PM UTC
Status: Resolved All systems are operational Affected components LangSmith Fleet (Operational)
Agent-scoped sandbox fails to initialize on new agents
Affected: LangSmith Fleet
Timeline · 4 updates
- investigating Sep 02, 2026, 05:04 PM UTC
Status: Investigating This affects only newly created agents with a shared computer. Affected components LangSmith Fleet (Partial outage)
- identified Sep 02, 2026, 05:59 PM UTC
Status: Identified 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. Affected components LangSmith Fleet (Partial outage)
- monitoring Sep 02, 2026, 08:32 PM UTC
Status: Monitoring The fix has been deployed. All systems are operational Affected components LangSmith Fleet (Operational)
- resolved Sep 02, 2026, 08:47 PM UTC
Status: Resolved All systems are operational Affected components LangSmith Fleet (Operational)
Elevated error rate for bulk exports
Affected: LangSmith Bulk Exports
Timeline · 3 updates
- investigating Sep 01, 2026, 07:43 PM UTC
Status: Investigating We are investigating an elevated error rate for bulk exports executions. Bulk exports are currently delayed. New bulk exports can still be created. Affected components LangSmith Bulk Exports (Partial outage)
- monitoring Sep 01, 2026, 07:53 PM UTC
Status: Monitoring We have mitigated the issue and have seen recovery. We're continuing to monitor. Affected components LangSmith Bulk Exports (Operational)
- resolved Sep 01, 2026, 08:17 PM UTC
Status: Resolved This incident has been resolved. Affected components LangSmith Bulk Exports (Operational)
Fetching traces timing out
Timeline · 5 updates
- investigating Aug 26, 2026, 04:16 PM UTC
Status: Investigating We are currently investigating an issue where some trace loads are timing out
- investigating Aug 26, 2026, 04:26 PM UTC
Status: Investigating 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
Status: Investigating This is primarily affecting run querying
- monitoring Aug 26, 2026, 04:42 PM UTC
Status: Monitoring 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
Status: Resolved 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
[GCP US only] LangSmith Deployments Builds Outage
Affected: LangSmith Deployments Control Plane
Timeline · 5 updates
- investigating Aug 20, 2026, 03:54 PM UTC
Status: Investigating Builds for new revisions of LangSmith Deployments are not being processed. Affected components LangSmith Deployments Control Plane (Partial outage)
- monitoring Aug 20, 2026, 04:30 PM UTC
Status: Monitoring Builds are being processed. Validating recovery. Affected components LangSmith Deployments Control Plane (Partial outage)
- identified Aug 20, 2026, 05:05 PM UTC
Status: Identified GCP is having an incident in us-west-1. Deployments may experience issues deploying new revisions. Affected components LangSmith Deployments Control Plane (Degraded performance)
- monitoring Aug 20, 2026, 05:54 PM UTC
Status: Monitoring New revisions are being processed normally. Validating recovery. Affected components LangSmith Deployments Control Plane (Degraded performance)
- resolved Aug 20, 2026, 06:32 PM UTC
Status: Resolved New revisions are deploying correctly. Affected components LangSmith Deployments Control Plane (Operational)
Partial ingestion failures for traces with large payloads
Timeline · 4 updates
- identified Aug 06, 2026, 03:03 PM UTC
Status: Identified 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
Status: Identified Updated affected regions
- monitoring Aug 06, 2026, 04:43 PM UTC
Status: Monitoring The service is temporarily patched. Large payloads are now ingested normally.
- resolved Aug 07, 2026, 07:40 AM UTC
Status: Resolved 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.
Agent tool calls failing on Anthropic Claude models
Affected: LangSmith Fleet
Timeline · 4 updates
- investigating Aug 05, 2026, 03:27 PM UTC
Status: Investigating 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. Affected components LangSmith Fleet (Degraded performance)
- identified Aug 05, 2026, 06:36 PM UTC
Status: Identified We're seeing elevated error rates when using Fleet with Claude models and certain MCP tools Affected components LangSmith Fleet (Degraded performance)
- monitoring Aug 05, 2026, 08:21 PM UTC
Status: Monitoring We're seeing elevated error rates when using Fleet with Claude models and certain MCP tools. Affected components LangSmith Fleet (Degraded performance)
- resolved Aug 05, 2026, 09:52 PM UTC
Status: Resolved Resolved. Fix is now deployed that skips an unsupported tool schema and logs a warning instead of failing the request. Affected components LangSmith Fleet (Operational)
High latencies and increased rate of 500s for analytical queries (stats and dashboards)
Timeline · 4 updates
- investigating Aug 03, 2026, 06:15 PM UTC
Status: Investigating 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
Status: Investigating 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
Status: Monitoring 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
Status: Resolved 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.
Build failure on new revisions
Affected: LangSmith Deployments Control Plane
Timeline · 2 updates
- identified Jul 16, 2026, 11:22 PM UTC
Status: Identified New revisions for Github backed projects are failing. This is due to an ongoing Github incident. Affected components LangSmith Deployments Control Plane (Degraded performance)
- resolved Jul 17, 2026, 12:09 AM UTC
Status: Resolved The Github incident has resolved. New revisions are being processed correctly. Affected components LangSmith Deployments Control Plane (Operational)
Ingestion is delayed
Affected: LangSmith Run Ingestion
Timeline · 2 updates
- investigating Jul 12, 2026, 09:28 PM UTC
Status: Investigating We are seeing some failures in trace ingestion. Ingestion is currently delayed. Affected components LangSmith Run Ingestion (Partial outage)
- resolved Jul 12, 2026, 09:59 PM UTC
Status: Resolved 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. Affected components LangSmith Run Ingestion (Operational)
Elevated Errors in Fleet
Affected: LangSmith Fleet
Timeline · 3 updates
- investigating Jul 09, 2026, 12:09 AM UTC
Status: Investigating 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. Affected components LangSmith Fleet (Partial outage)
- monitoring Jul 09, 2026, 12:21 AM UTC
Status: Monitoring We've deployed a fix and are seeing error rates return to normal. We're monitoring Fleet closely to confirm full recovery. Affected components LangSmith Fleet (Degraded performance)
- resolved Jul 09, 2026, 12:22 AM UTC
Status: Resolved The issue affecting Fleet has been resolved, and users can interact with their agents normally again. Thanks for your patience. Affected components LangSmith Fleet (Operational)
Performance degradation of legacy storage cluster
Affected: LangSmith ApplicationLangSmith API
Timeline · 3 updates
- investigating Jun 10, 2026, 12:41 PM UTC
Status: Investigating 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. Affected components LangSmith Application (Degraded performance) LangSmith API (Degraded performance)
- monitoring Jun 10, 2026, 01:39 PM UTC
Status: Monitoring The rollback of the legacy storage cluster is mostly complete, and request latencies have largely normalized. Affected components LangSmith Application (Degraded performance) LangSmith API (Degraded performance)
- resolved Jun 10, 2026, 01:49 PM UTC
Status: Resolved The rollback is complete, and our latency readings are back to nominal levels. Affected components LangSmith API (Operational) LangSmith Application (Operational)
Elevated LangSmith API error rate
Affected: LangSmith ApplicationLangSmith API
Timeline · 3 updates
- investigating Jun 07, 2026, 09:50 AM UTC
Status: Investigating We are investigating elevated error rates in the LangSmith API. Affected components LangSmith Application (Partial outage) LangSmith API (Partial outage)
- monitoring Jun 07, 2026, 09:54 AM UTC
Status: Monitoring We've mitigated the issue and are seeing initial recovery and are continuing to monitor. Affected components LangSmith Application (Operational) LangSmith API (Operational)
- resolved Jun 07, 2026, 10:08 AM UTC
Status: Resolved This incident has been resolved. Affected components LangSmith Application (Operational) LangSmith API (Operational)
Billing usage ingestion delays
Affected: LangSmith Billing
Timeline · 3 updates
- identified Jun 05, 2026, 06:38 PM UTC
Status: Identified We have identified an issue causing delays in billable usage tracking for LangSmith Deployments. Affected components LangSmith Billing (Degraded performance)
- monitoring Jun 06, 2026, 12:23 AM UTC
Status: Monitoring We have a fix in place and are processing the backlog of usage. Affected components LangSmith Billing (Degraded performance)
- resolved Jun 06, 2026, 02:08 AM UTC
Status: Resolved The backlog has completed processing. This incident is resolved. Affected components LangSmith Billing (Operational)
Bulk exports not being processed
Affected: LangSmith API
Timeline · 3 updates
- investigating May 27, 2026, 12:09 PM UTC
Status: Investigating We're currently investigating an issue causing a number of bulk exports to become stuck. Affected components LangSmith API (Partial outage)
- monitoring May 27, 2026, 01:32 PM UTC
Status: Monitoring A fix has been successfully deployed and bulk exports are succeeding again. The team continue to monitor for any further issues. Affected components LangSmith API (Operational)
- resolved May 27, 2026, 03:38 PM UTC
Status: Resolved No further issues have been observed and this incident is now considered resolved. Affected components LangSmith API (Operational)
Sandbox create failing
Affected: LangSmith Sandboxes
Timeline · 4 updates
- investigating May 22, 2026, 04:35 PM UTC
Status: Investigating All sandbox create calls error Affected components LangSmith Sandboxes (Partial outage)
- identified May 22, 2026, 05:15 PM UTC
Status: Identified Fix is rolling out Affected components LangSmith Sandboxes (Partial outage)
- monitoring May 22, 2026, 05:16 PM UTC
Status: Monitoring Creates succeeding again Affected components LangSmith Sandboxes (Operational)
- resolved May 22, 2026, 05:29 PM UTC
Status: Resolved Resolved Affected components LangSmith Sandboxes (Operational)
Bulk export failures
Affected: LangSmith API
Timeline · 5 updates
- investigating May 14, 2026, 04:53 PM UTC
Status: Investigating We're currently investigating an issue causing some bulk exports to fail or become stuck. Affected components LangSmith API (Partial outage)
- identified May 15, 2026, 01:27 AM UTC
Status: Identified The team have identified the issue and a fix is being deployed. Affected components LangSmith API (Partial outage)
- monitoring May 15, 2026, 02:51 AM UTC
Status: Monitoring The fix has been successfully deployed and bulk exports are succeeding again. The team continue to monitor for any further issues. Affected components LangSmith API (Operational)
- investigating May 15, 2026, 01:55 PM UTC
Status: Investigating Unfortunately we continue to see a number of bulk export jobs failing. The team are investigating the cause. Affected components LangSmith API (Partial outage)
- resolved May 16, 2026, 12:38 AM UTC
Status: Resolved This incident has been resolved. Affected components LangSmith API (Operational)
Increased latency in LangSmith API backend
Affected: LangSmith ApplicationLangSmith APILangSmith Run Ingestion
Timeline · 3 updates
- investigating May 13, 2026, 12:58 PM UTC
Status: Investigating We are investigating an increase in backend latency in the LangSmith service. Affected components LangSmith Run Ingestion (Degraded performance) LangSmith Application (Degraded performance) LangSmith API (Degraded performance)
- identified May 13, 2026, 01:44 PM UTC
Status: Identified 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. Affected components LangSmith Application (Degraded performance) LangSmith API (Degraded performance) LangSmith Run Ingestion (Degraded performance)
- resolved May 13, 2026, 02:00 PM UTC
Status: Resolved The issue is now fully resolved. All services are restored and fully operational. Affected components LangSmith Run Ingestion (Operational) LangSmith Application (Operational) LangSmith API (Operational)
LangSmith UI: ongoing incident — trace visualization unavailable
Affected: LangSmith Application
Timeline · 4 updates
- investigating Apr 30, 2026, 02:59 PM UTC
Status: Investigating We're currently investigating an incident affecting trace visualization in the LangSmith UI. Traces may not render correctly or may fail to load. Affected components LangSmith Application (Partial outage)
- identified Apr 30, 2026, 03:33 PM UTC
Status: Identified We have identified the root cause and are working on a fix. Affected components LangSmith Application (Partial outage)
- monitoring Apr 30, 2026, 04:19 PM UTC
Status: Monitoring We have deployed a fix and are continuing to monitor the situation closely. Trace ingestion was not impacted. We apologize for the inconvenience. Affected components LangSmith Application (Partial outage)
- resolved Apr 30, 2026, 06:30 PM UTC
Status: Resolved The fix has been properly released. Thank you for your patience and sorry for the inconvenience. Affected components LangSmith Application (Operational)
Annotation run view performance degradation
Affected: LangSmith Application
Timeline · 3 updates
- investigating Apr 28, 2026, 08:44 AM UTC
Status: Investigating 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. Affected components LangSmith Application (Degraded performance)
- identified Apr 28, 2026, 11:25 AM UTC
Status: Identified The cause of the issue has been identified and the team is currently working on a fix. Affected components LangSmith Application (Degraded performance)
- resolved Apr 28, 2026, 02:25 PM UTC
Status: Resolved 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. Affected components LangSmith Application (Operational)
LangSmith Deployments outage
Affected: LangSmith Deployments Data PlaneLangSmith Deployments Control Plane
Timeline · 4 updates
- investigating Mar 16, 2026, 10:02 AM UTC
Status: Investigating We're currently investigating an issue causing deployment failures. Affected components LangSmith Deployments Data Plane (Partial outage)
- identified Mar 16, 2026, 10:41 AM UTC
Status: Identified The issue is impacting the LangSmith Deployments Control Plane. A fix is being deployed now. Affected components LangSmith Deployments Control Plane (Partial outage) LangSmith Deployments Data Plane (Operational)
- monitoring Mar 16, 2026, 10:47 AM UTC
Status: Monitoring A fix for this issue has been deployed. The team continue to monitor system health. Affected components LangSmith Deployments Control Plane (Operational) LangSmith Deployments Data Plane (Operational)
- resolved Mar 16, 2026, 02:11 PM UTC
Status: Resolved The fix was successful and this issue is now considered resolved. Affected components LangSmith Deployments Control Plane (Operational) LangSmith Deployments Data Plane (Operational)
Bulk export delays
Affected: LangSmith API
Timeline · 4 updates
- identified Feb 26, 2026, 06:12 PM UTC
Status: Identified We've identified a capacity issue causing stuck and delayed bulk exports. We're working on increasing capacity to mitigate. Affected components LangSmith API (Degraded performance)
- identified Feb 26, 2026, 08:24 PM UTC
Status: Identified We've scaled up the relevant systems and are observing recovery as the queue drains. Affected components LangSmith API (Degraded performance)
- monitoring Feb 26, 2026, 10:58 PM UTC
Status: Monitoring The backlog is continuing to process, and we are continuing to monitor. Affected components LangSmith API (Degraded performance)
- resolved Feb 27, 2026, 03:14 AM UTC
Status: Resolved This incident has been resolved. Affected components LangSmith API (Operational)
Increased 5XX error rates across all LangSmith endpoints
Affected: LangSmith Run IngestionLangSmith BillingLangSmith PromptHubLangSmith APILangSmith ApplicationLangSmith Deployments Control Plane
Timeline · 3 updates
- monitoring Feb 22, 2026, 12:05 AM UTC
Status: Monitoring We have just experienced a ~18 minute period between 3:24-3:42PM PDT of elevated 5XX error rates impacting all endpoints including trace ingestion. Our systems have recovered and we are monitoring closely. Affected components LangSmith Application (Partial outage) LangSmith Deployments Control Plane (Partial outage) LangSmith Billing (Partial outage) LangSmith PromptHub (Partial outage) LangSmith API (Partial outage) LangSmith Run Ingestion (Partial outage)
- monitoring Feb 22, 2026, 12:06 AM UTC
Status: Monitoring Systems are operational, and we are monitoring closely. Affected components LangSmith Deployments Control Plane (Operational) LangSmith Billing (Operational) LangSmith PromptHub (Operational) LangSmith API (Operational) LangSmith Run Ingestion (Operational) LangSmith Application (Operational)
- resolved Feb 23, 2026, 12:28 AM UTC
Status: Resolved All services were restored and fully operational on February 21, 2026, at 23:42 UTC. Affected components LangSmith Deployments Control Plane (Operational) LangSmith Billing (Operational) LangSmith PromptHub (Operational) LangSmith API (Operational) LangSmith Run Ingestion (Operational) LangSmith Application (Operational)