LangChain Outage History

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LangChain had 33 outages in the last 2 years totaling 344h 30m of downtime — averaging 1.4 incidents per month.

There were 33 LangChain outages since September 8, 2025 totaling 344h 30m of downtime. Each is summarised below — incident details, duration, and resolution information.

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

Minor August 20, 2026

[GCP US only] LangSmith Deployments Builds Outage

Detected by Pingoru
Aug 20, 2026, 06:32 PM UTC
Resolved
Aug 20, 2026, 06:32 PM UTC
Duration
Affected: LangSmith Deployments Control Plane
Timeline · 5 updates
  1. 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)

  2. monitoring Aug 20, 2026, 04:30 PM UTC

    Status: Monitoring Builds are being processed. Validating recovery. Affected components LangSmith Deployments Control Plane (Partial outage)

  3. 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)

  4. 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)

  5. resolved Aug 20, 2026, 06:32 PM UTC

    Status: Resolved New revisions are deploying correctly. Affected components LangSmith Deployments Control Plane (Operational)

Read the full incident report →

Minor August 7, 2026

Partial ingestion failures for traces with large payloads

Detected by Pingoru
Aug 07, 2026, 07:40 AM UTC
Resolved
Aug 07, 2026, 07:40 AM UTC
Duration
Timeline · 4 updates
  1. 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.

  2. identified Aug 06, 2026, 03:33 PM UTC

    Status: Identified Updated affected regions

  3. monitoring Aug 06, 2026, 04:43 PM UTC

    Status: Monitoring The service is temporarily patched. Large payloads are now ingested normally.

  4. 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.

Read the full incident report →

Minor August 5, 2026

Agent tool calls failing on Anthropic Claude models

Detected by Pingoru
Aug 05, 2026, 09:52 PM UTC
Resolved
Aug 05, 2026, 09:52 PM UTC
Duration
Affected: LangSmith Fleet
Timeline · 4 updates
  1. 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)

  2. 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)

  3. 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)

  4. 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)

Read the full incident report →

Minor August 3, 2026

High latencies and increased rate of 500s for analytical queries (stats and dashboards)

Detected by Pingoru
Aug 03, 2026, 09:13 PM UTC
Resolved
Aug 03, 2026, 09:13 PM UTC
Duration
Timeline · 4 updates
  1. 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.

  2. 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.

  3. 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.

  4. 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.

Read the full incident report →

Minor July 17, 2026

Build failure on new revisions

Detected by Pingoru
Jul 17, 2026, 12:09 AM UTC
Resolved
Jul 17, 2026, 12:09 AM UTC
Duration
Affected: LangSmith Deployments Control Plane
Timeline · 2 updates
  1. 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)

  2. 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)

Read the full incident report →

Minor July 12, 2026

Ingestion is delayed

Detected by Pingoru
Jul 12, 2026, 09:59 PM UTC
Resolved
Jul 12, 2026, 09:59 PM UTC
Duration
Affected: LangSmith Run Ingestion
Timeline · 2 updates
  1. 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)

  2. 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)

Read the full incident report →

Minor July 9, 2026

Elevated Errors in Fleet

Detected by Pingoru
Jul 09, 2026, 12:22 AM UTC
Resolved
Jul 09, 2026, 12:22 AM UTC
Duration
Affected: LangSmith Fleet
Timeline · 3 updates
  1. 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)

  2. 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)

  3. 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)

Read the full incident report →

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 ApplicationLangSmith API
Timeline · 3 updates
  1. 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)

  2. 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)

  3. 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)

Read the full incident report →

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 ApplicationLangSmith API
Timeline · 3 updates
  1. 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)

  2. 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)

  3. resolved Jun 07, 2026, 10:08 AM UTC

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

Read the full incident report →

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
  1. 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)

  2. 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)

  3. resolved Jun 06, 2026, 02:08 AM UTC

    Status: Resolved The backlog has completed processing. This incident is resolved. Affected components LangSmith Billing (Operational)

Read the full incident report →

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
  1. 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)

  2. 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)

  3. 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
  1. investigating May 22, 2026, 04:35 PM UTC

    Status: Investigating All sandbox create calls error Affected components LangSmith Sandboxes (Partial outage)

  2. identified May 22, 2026, 05:15 PM UTC

    Status: Identified Fix is rolling out Affected components LangSmith Sandboxes (Partial outage)

  3. monitoring May 22, 2026, 05:16 PM UTC

    Status: Monitoring Creates succeeding again Affected components LangSmith Sandboxes (Operational)

  4. resolved May 22, 2026, 05:29 PM UTC

    Status: Resolved Resolved Affected components LangSmith Sandboxes (Operational)

Read the full incident report →

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
  1. 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)

  2. 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)

  3. 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)

  4. 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)

  5. 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 ApplicationLangSmith APILangSmith Run Ingestion
Timeline · 3 updates
  1. 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)

  2. 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)

  3. 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)

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
  1. 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)

  2. 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)

  3. 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)

  4. 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
  1. 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)

  2. 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)

  3. 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
  1. 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)

  2. 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)

  3. 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)

  4. 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
  1. 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)

  2. 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)

  3. 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)

  4. 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
  1. 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)

  2. 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)

  3. 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
  1. 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)

  2. 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)

  3. resolved Feb 21, 2026, 07:33 PM UTC

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

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
  1. 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)

  2. 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)

  3. 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)

  4. 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)

Read the full incident report →

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
  1. 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)

  2. 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)

  3. 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)

  4. 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)

Read the full incident report →