Is Cognite down?

Status: Investigating We experienced elevated 5XX error rates affecting the Timeseries and Sequences APIs on cluster az-pnq-gp-001 between approximately 07:18 and 07:45 CEST. Services have recovered and all deployments are healthy, with no indication of data loss. The engineering team is actively monitoring the service to ensure continued stability while completing the investigation into the underlying cause.

Status: Resolved Services are fully recovered and operating normally. The elevated 5XX error rates affecting the Timeseries and Sequences APIs on cluster az-pnq-gp-001 between approximately 07:18 and 07:45 CEST on September 6, 2026 were resolved following auto-healing of the FoundationDB operator pod instability. Monitoring confirms all deployments remain healthy and stable, with no data loss incurred.

Status: Investigating The engineering team is investigating and fixing issues with the Data Modelling search and aggregate APIs in the westeurope-1 cluster. Customer impact includes increased error rates on DM APIs and in the data exploration app in Fusion, and delays before new data is available in search results. Affected components Cognite Maintain (Partial outage) Cognite Data Fusion API (Partial outage) Cognite InField (Partial outage) Cognite Data Fusion UI (Partial outage)

Status: Investigating This incident has been resolved. The issue causing HTTP 500/503 errors when searching or aggregating Data Models in westeurope-1 has been mitigated, and service performance has fully recovered. All systems are operating normally. Affected components Cognite Maintain (Partial outage) Cognite Data Fusion API (Partial outage) Cognite InField (Partial outage) Cognite Data Fusion UI (Partial outage)

Status: Resolved This incident has been resolved. The issue causing HTTP 500/503 errors when searching or aggregating Data Models in westeurope-1 has been mitigated, and service performance has fully recovered. All systems are operating normally. Affected components Cognite Data Fusion UI (Operational) Cognite Maintain (Operational) Cognite Data Fusion API (Operational) Cognite InField (Operational)

Status: Monitoring The engineering team is investigating and fixing issues with the Data Modelling search and aggregate APIs in the westeurope-1 cluster. Customer impact includes increased error rates on DM APIs and in the data exploration app in Fusion, and delays before new data is available in search results. Affected components Cognite Data Fusion API (Degraded performance)

Status: Monitoring The engineering team is investigating and fixing issues with the Data Modelling search and aggregate APIs in the westeurope-1 cluster. Customer impact includes increased error rates on DM APIs and in the data exploration app in Fusion, and delays before new data is available in search results. Affected components Cognite Data Fusion API (Degraded performance)

Status: Monitoring The engineering team is investigating and fixing issues with the Data Modelling search and aggregate APIs in the westeurope-1 cluster. Customer impact includes increased error rates on DM APIs and in the data exploration app in Fusion, and delays before new data is available in search results. Affected components Cognite Data Fusion API (Partial outage)

Status: Resolved • Problem: The production propertygraph-search Elasticsearch cluster in westeurope-1 went red for roughly 10 minutes. • Root cause: Propertygraph syncer activity and cluster topology created excessive master-coordination overhead. PVC mount failures were also observed on Elasticsearch master-data pods, but were not confirmed as the original cause. • Resolution: Engineering Team scaled down the propertygraph syncers to recover cluster health, then restored every propertygraph-sync-v3 deployment to one replica in stages. They also reduced node/master-coordination overhead and reconfigured all 15 master-data nodes with 19 GB heaps; the cluster reached zero unassigned shards and was considered stable. Affected components Cognite Data Fusion API (Operational)

Status: Monitoring Identified - We are investigating an issue affecting user logins across Cognite Data Fusion (Fusion), Infield, and Maintain. Some users may experience login failures displaying the error: "An HTTP line is larger than 4096 bytes". A recent identity service update has been identified as the likely cause, and our engineering team is actively deploying a rollback to restore full login functionality. We will provide another update soon as the rollback is completed. Affected components Cognite InField (Partial outage) Cognite Maintain (Partial outage) Cognite InField (Partial outage) Cognite Maintain (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite InField (Partial outage) Cognite InField (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite Maintain (Partial outage) Cognite Maintain (Partial outage) Cognite Maintain (Partial outage) Cognite Infield (Partial outage) Cognite Maintain (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite InField (Partial outage) Cognite Maintain (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite InField (Partial outage) Cognite Maintain (Partial outage) Cognite InField (Partial outage) Cognite Maintain (Partial outage) Cognite Maintain (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite Maintain (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite Infield (Partial outage) Cognite Maintain (Partial outage) Cognite InField (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite Infield (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite InField (Partial outage) Cognite Maintain (Partial outage) Cognite InField (Partial outage) Cognite InField (Partial outage) Cognite Maintain (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite Data Fusion API (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite Infield (Partial outage) Cognite Infield (Partial outage) Cognite Infield (Partial outage) Cognite Maintain (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite Maintain (Partial outage) Cognite Data Fusion UI (Partial outage) Cognite Maintain (Partial outage) Cognite Maintain (Partial outage) Cognite Infield (Partial outage) Cognite Data Fusion UI (Partial outage)

Status: Resolved The issue causing login failures across Cognite Data Fusion, InField, and Maintain has been resolved. The underlying deployment change was rolled back, and normal service has been fully restored across all clusters. Affected components Cognite Maintain (Operational) Cognite Infield (Operational) Cognite Data Fusion UI (Operational) Cognite Infield (Operational) Cognite Data Fusion UI (Operational) Cognite Maintain (Operational) Cognite InField (Operational) Cognite Data Fusion UI (Operational) Cognite InField (Operational) Cognite Maintain (Operational) Cognite Infield (Operational) Cognite Data Fusion UI (Operational) Cognite InField (Operational) Cognite InField (Operational) Cognite Maintain (Operational) Cognite Infield (Operational) Cognite Data Fusion UI (Operational) Cognite Infield (Operational) Cognite Infield (Operational) Cognite Maintain (Operational) Cognite Data Fusion UI (Operational) Cognite Maintain (Operational) Cognite Maintain (Operational) Cognite InField (Operational) Cognite Data Fusion UI (Operational) Cognite Maintain (Operational) Cognite Maintain (Operational) Cognite InField (Operational) Cognite Data Fusion UI (Operational) Cognite InField (Operational) Cognite InField (Operational) Cognite Data Fusion UI (Operational) Cognite InField (Operational) Cognite Data Fusion UI (Operational) Cognite Maintain (Operational) Cognite Data Fusion UI (Operational) Cognite Maintain (Operational) Cognite Maintain (Operational) Cognite Maintain (Operational) Cognite Data Fusion UI (Operational) Cognite InField (Operational) Cognite Maintain (Operational) Cognite Data Fusion UI (Operational) Cognite Data Fusion API (Operational) Cognite Data Fusion UI (Operational) Cognite Data Fusion UI (Operational) Cognite Data Fusion UI (Operational) Cognite Data Fusion UI (Operational) Cognite InField (Operational) Cognite Maintain (Operational) Cognite Infield (Operational) Cognite Maintain (Operational) Cognite Maintain (Operational) Cognite Maintain (Operational)

Status: Investigating Summary: We are currently investigating an issue impacting Data Model (DM) Search and aggregation queries in the westeurope-1 region. Customer Impact: Requests to search or aggregate data models in westeurope-1 may fail with HTTP 503 errors or return incomplete/delayed results. Core data storage and other regions are operating normally. Current Actions: Our engineering team is actively working on cluster recovery and load mitigation, including throttling background sync operations to restore search performance. Next Update: We are monitoring recovery progress and will provide another update within 60 minutes or as soon as significant updates are available. Affected components Cognite Data Fusion API (Partial outage)

Status: Monitoring We have implemented mitigation steps for the issue impacting Data Model (DM) Search and aggregation queries in the westeurope-1 region. The service has stabilized, and we are currently monitoring the system to ensure full recovery. Search and aggregation requests for data models in westeurope-1 should now complete successfully without HTTP 503 errors. Customers may still see slight delays in data freshness as background sync operations catch up, but normal functionality has been largely restored. Core data storage and other regions continue to operate normally. Our engineering team has successfully stabilized the underlying Elasticsearch cluster and carefully re-enabled background sync operations in controlled stages. We will continue to closely monitor cluster health and performance metrics to ensure the service remains stable. Affected components Cognite Data Fusion API (Operational)

Status: Resolved Summary: We experienced an issue affecting the Property Graph search service in the West Europe region. The Elasticsearch cluster became unstable after receiving unusually large synchronization requests, which caused circuit-breaker errors. Steps taken: We stabilized the Elasticsearch cluster, then re-enabled background synchronization in controlled stages while monitoring cluster health, CPU usage, and indexing rates. Resolved status: The service has stabilized and normal functionality has been restored. Background synchronization has resumed, and we will continue monitoring to ensure it remains healthy. Affected components Cognite Data Fusion API (Operational)