LangChain incident

Thread-scoped sandbox initialization timeouts on new agents

Minor Resolved View vendor source →

LangChain experienced a minor incident on September 4, 2026 affecting LangSmith Fleet, lasting —. The incident has been resolved; the full update timeline is below.

Started
Sep 04, 2026, 07:38 PM UTC
Resolved
Sep 04, 2026, 07:38 PM UTC
Duration
—
Detected by Pingoru
Sep 04, 2026, 07:38 PM UTC

Affected components

LangSmith Fleet

Update timeline

  1. 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)

  2. 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)

  3. monitoring Sep 04, 2026, 07:31 PM UTC

    Status: Monitoring The fix has been deployed. All systems are operational Affected components LangSmith Fleet (Operational)

  4. resolved Sep 04, 2026, 07:38 PM UTC

    Status: Resolved All systems are operational Affected components LangSmith Fleet (Operational)