LangChain Outage History

LangChain had 33 outages in the last 2 years totaling 430h 34m of downtime — averaging 1.4 incidents per month.

There were 33 LangChain outages since June 18, 2025 totaling 430h 34m of downtime. Each is summarised below — incident details, duration, and resolution information.

Source: https://status.smith.langchain.com

Minor June 10, 2026

Performance degradation of legacy storage cluster

Detected by Pingoru: Jun 10, 2026, 01:49 PM UTC
Resolved: Jun 10, 2026, 01:49 PM UTC
Duration: —

Affected: LangSmith APILangSmith Application

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 API (Degraded performance) LangSmith Application (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 API (Degraded performance) LangSmith Application (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)

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Minor June 7, 2026

Elevated LangSmith API error rate

Detected by Pingoru: Jun 07, 2026, 10:08 AM UTC
Resolved: Jun 07, 2026, 10:08 AM UTC
Duration: —

Affected: LangSmith APILangSmith Application

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 API (Partial outage) LangSmith Application (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 API (Operational) LangSmith Application (Operational)
resolved Jun 07, 2026, 10:08 AM UTC

Status: Resolved This incident has been resolved. Affected components LangSmith API (Operational) LangSmith Application (Operational)

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Minor June 6, 2026

Billing usage ingestion delays

Detected by Pingoru: Jun 06, 2026, 02:08 AM UTC
Resolved: Jun 06, 2026, 02:08 AM UTC
Duration: —

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)

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Minor May 27, 2026

Bulk exports not being processed

Detected by Pingoru: May 27, 2026, 03:38 PM UTC
Resolved: May 27, 2026, 03:38 PM UTC
Duration: —

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)

Read the full incident report →

Minor May 22, 2026

Sandbox create failing

Detected by Pingoru: May 22, 2026, 05:29 PM UTC
Resolved: May 22, 2026, 05:29 PM UTC
Duration: —

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)

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Minor May 16, 2026

Bulk export failures

Detected by Pingoru: May 16, 2026, 12:38 AM UTC
Resolved: May 16, 2026, 12:38 AM UTC
Duration: —

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)

Read the full incident report →

Minor May 13, 2026

Increased latency in LangSmith API backend

Detected by Pingoru: May 13, 2026, 02:00 PM UTC
Resolved: May 13, 2026, 02:00 PM UTC
Duration: —

Affected: LangSmith Run IngestionLangSmith APILangSmith Application

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 API (Degraded performance) LangSmith Run Ingestion (Degraded performance) LangSmith Application (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 API (Degraded performance) LangSmith Run Ingestion (Degraded performance) LangSmith Application (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 API (Operational) LangSmith Run Ingestion (Operational) LangSmith Application (Operational)

Read the full incident report →

Minor April 30, 2026

LangSmith UI: ongoing incident — trace visualization unavailable

Detected by Pingoru: Apr 30, 2026, 06:30 PM UTC
Resolved: Apr 30, 2026, 06:30 PM UTC
Duration: —

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)

Read the full incident report →

Minor April 28, 2026

Annotation run view performance degradation

Detected by Pingoru: Apr 28, 2026, 02:25 PM UTC
Resolved: Apr 28, 2026, 02:25 PM UTC
Duration: —

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)

Read the full incident report →

Minor March 16, 2026

LangSmith Deployments outage

Detected by Pingoru: Mar 16, 2026, 02:11 PM UTC
Resolved: Mar 16, 2026, 02:11 PM UTC
Duration: —

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)

Read the full incident report →

Minor February 27, 2026

Bulk export delays

Detected by Pingoru: Feb 27, 2026, 03:14 AM UTC
Resolved: Feb 27, 2026, 03:14 AM UTC
Duration: —

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)

Read the full incident report →

Minor February 23, 2026

Increased 5XX error rates across all LangSmith endpoints

Detected by Pingoru: Feb 23, 2026, 12:28 AM UTC
Resolved: Feb 23, 2026, 12:28 AM UTC
Duration: —

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)

Read the full incident report →

Minor February 21, 2026

Issues with stats functionality

Detected by Pingoru: Feb 21, 2026, 07:33 PM UTC
Resolved: Feb 21, 2026, 07:33 PM UTC
Duration: —

Affected: LangSmith Application

Timeline · 3 updates

investigating Feb 21, 2026, 05:17 PM UTC

Status: Investigating Impact limited to stats and no impact to trace ingestion or other capabilities. Our engineers are working with our service provider to address the cause Affected components LangSmith Application (Degraded performance)
monitoring Feb 21, 2026, 05:53 PM UTC

Status: Monitoring Services are recovering. We are monitoring to ensure normal operations Affected components LangSmith Application (Degraded performance)
resolved Feb 21, 2026, 07:33 PM UTC

Status: Resolved All services are back to normal operations Affected components LangSmith Application (Operational)

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Minor February 21, 2026

Issues with stats functionality

Detected by Pingoru: Feb 21, 2026, 05:17 PM UTC
Resolved: Feb 21, 2026, 07:33 PM UTC
Duration: 2h 16m

Read the full incident report →

Minor February 19, 2026

LangSmith Deployments downtime in us-central region

Detected by Pingoru: Feb 19, 2026, 09:20 PM UTC
Resolved: Feb 19, 2026, 09:20 PM UTC
Duration: —

Affected: LangSmith Deployments Data Plane

Timeline · 4 updates

investigating Feb 17, 2026, 09:12 PM UTC

Status: Investigating All deployments in the us-central region are currently down. Affected components LangSmith Deployments Data Plane (Partial outage)
identified Feb 17, 2026, 10:22 PM UTC

Status: Identified Fix is in progress, deployments should be back up shortly. Affected components LangSmith Deployments Data Plane (Partial outage)
monitoring Feb 17, 2026, 11:04 PM UTC

Status: Monitoring All deployments in the us-central region have been restored, currently monitoring the health of the cluster to verify no degradation. Affected components LangSmith Deployments Data Plane (Partial outage)
resolved Feb 19, 2026, 09:20 PM UTC

Status: Resolved LangSmith Deployments us-central cluster is now fully operational. Affected components LangSmith Deployments Data Plane (Operational)

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Minor February 4, 2026

Investigating issues with Dataset Example visibility

Detected by Pingoru: Feb 04, 2026, 02:04 PM UTC
Resolved: Feb 04, 2026, 02:04 PM UTC
Duration: —

Affected: LangSmith APILangSmith Application

Timeline · 4 updates

investigating Feb 04, 2026, 12:17 PM UTC

Status: Investigating We are currently investigating an issue where some users are seeing 0 examples or incomplete data within their datasets. Our preliminary investigation suggests this is a display and query issue rather than a loss of underlying data. What this means for you: • You may see "0 examples" on datasets that previously contained data. • API calls for these datasets may return incomplete results, which can impact active evaluations and experiments. Current Status: We are currently working on a fix to restore full visibility to all affected datasets. No data has been deleted, and we are working to ensure all examples are visible again as soon as possible. Affected components LangSmith API (Degraded performance) LangSmith Application (Degraded performance)
identified Feb 04, 2026, 01:28 PM UTC

Status: Identified We have identified the root cause of an issue affecting dataset visibility and are working on a fix. No data loss has occurred. We will provide another update shortly. Affected components LangSmith API (Degraded performance) LangSmith Application (Degraded performance)
monitoring Feb 04, 2026, 01:50 PM UTC

Status: Monitoring A fix has been deployed to restore dataset visibility. We are currently monitoring the system to ensure all data is appearing correctly across the platform. Affected components LangSmith API (Degraded performance) LangSmith Application (Degraded performance)
resolved Feb 04, 2026, 02:04 PM UTC

Status: Resolved Issue has been identified as only having affecting EU customers. No impact on US customers. Affected components LangSmith API (Operational) LangSmith Application (Operational)