Cornerstone Outage History

126 incidents recorded over the last 365 days, 93 of them resolved. Durations are measured from when PulsAPI first saw the problem to when it cleared, which is usually longer than the vendor's own figure.

Live Cornerstone status100.00% uptime history

Every Recorded Cornerstone Incident

Cornerstone incidents, newest first, with date, duration and status.
DateIncidentDurationStatus
Oct 30, 2026Latency on JP SL1 PRDThe CSOD Technology Team observed a performance degradation affecting this swimlane. The problem began at 18:05 and was resolved at 18:55, 29 Oct PDT. During this time, clients with portals on this swimlane may have…48 minResolved
Oct 29, 2026Queue processing issue on US SL1This issue is resolved. The queues are continuing to process successfully.4h 52mResolved
Oct 27, 2026Learning Assignments for US SL1 Swimlane Stuck in a Queued StatusWe have finished processing the LAT queue at 5 PM PT. There is currently no ongoing backup for asynchronous processing in US SL1.11h 16mResolved
Oct 21, 2026Intermittent Latency & Issues Launching Training - US SL3 and US SL5The CSOD Technology Team observed an issue with users launching training. The problem was intermittent between 11 AM Pacific Time and was resolved at 2 PM Pacific Time. During this time, users may have experienced…4h 21mResolved
Oct 20, 2026FTP inaccessible across UK ProductionOur Engineering team has confirmed that FTP access across the UK Production environment has been restored. We have also performed checks on our side, and no further issues have been observed so far.5h 51mResolved
Oct 20, 2026Minor Issue - DLW Feeds not processing US SL1 and USL5After a full day of monitoring we are considering this issue resolved. A formal Root Cause Analysis will be published within 7-10 business days including preventive measures.27h 48mResolved
Oct 19, 2026Major Issue - System availability issues on EU (FRA) Production**Root Cause Analysis**   **Incident Overview:** On October 19th, 2026, at approximately 2:16 AM PT, a service disruption impacted the EU region \(FRA SL1\) preventing customers from accessing the application login…3h 29mResolved
Oct 16, 2026Learner Home Latency – EU SL1 (FRA)**Issue Summary:** On October 16, 2026, users in the EU SL1 Production environment experienced increased latency when accessing Learner Home. Affected users experienced slower response times and delays in loading…-611 minResolved
Oct 16, 2026Latency on JP PRD SL Portal**Issue Summary:** On October 15, 2026, users in the JP Production environment experienced latency and intermittent request timeouts, resulting in degraded application performance.nAffected users experienced slow…16 minResolved
Oct 15, 2026Minor Issue - DLW Feeds not processing US SL1 and USL5The CSOD Technology Team observed issues with Data Load Wizard processing on US SL1 and US SL5. The problem began at 12:47 PM Pacific Time and was resolved at 1:10 PM Pacific Time. During this time, Feeds for Data…1h 0mResolved
Oct 14, 2026EU (FRA) SL1 and FR (CDG) - Career Site not working**Root Cause Analysis**   **Incident Summary:** On October 14th, 2026, an incident impacted Career Site availability across the FRA SL1 & CDG SL1 Production environments, preventing users from accessing the Career…3h 12mResolved
Oct 12, 2026Reporting 2.0 – FRA (EU) SL1 - Unable to Create or Edit Reports Due to Unresponsive Report Builder**Incident Summary** On October 12, 2026, an issue was identified in the FRA Production environment affecting Reporting functionality. Users experienced performance degradation, with some Reporting pages taking longer…1h 29mResolved
Oct 10, 2026Patch 26.02.06 - CSOD Data Centers at USThe scheduled maintenance has been completed.2h 0mScheduled
Oct 10, 2026Patch 26.02.06 - CSOD Data Centers at EU/FR/UKThe scheduled maintenance has been completed.2h 0mScheduled
Oct 9, 2026Patch 26.02.06 - CSOD Data Centers at AU/JPThe scheduled maintenance has been completed.2h 0mScheduled
Oct 8, 2026Resolved: Issue while editing User records on US SL4 swim lane**Issue Summary:** On October 8, 2026, customers in the US SL4 Production environment experienced issues accessing user records. Affected users were temporarily unable to access user records, resulting in a disruption…-130 minResolved
Oct 7, 2026Latency on CDG SL Portals**Issue Summary:** On October 7, 2026, users in the CDG SL1 and CDG SL4 Production environments experienced increased latency when accessing Learner Home. Affected users experienced delays in loading and navigating…4h 58mResolved
Oct 6, 2026Latency on Reporting 2.0 - UK SL2 swimlane**Root Cause Analysis**   **Incident Summary:** On October 6th, 2026, High CPU utilization was observed in the UK SL2 Production environment, resulting in significant performance degradation in Reporting 2.0 and…5h 35mResolved
Oct 2, 2026EU FRA SL1 Swimlane – System Latency**Root Cause Analysis** **Incident Summary:** On Oct. 1st and again on Oct. 2nd, 2026, users across the FRA SL1 Production environment experienced issues accessing Learner Home. **Impact:** Affected users…8h 33mResolved
Oct 1, 2026EU (FRA) Swimlane – Learner Home Latency**Root Cause Analysis** **Incident Summary:** On Oct. 1st and again on Oct. 2nd, 2026, users across the FRA SL1 Production environment experienced issues accessing Learner Home. **Impact:** Affected users…4h 29mResolved
Sep 30, 2026High Event queue count in US SL3**Issue Summary:** On September 30, 2026, the US SL3 Production environment experienced delays in processing queued operations, resulting in an unusually high volume of events. Affected operations were unable to…31 minResolved
Sep 29, 2026Development Plans – Functional Issues and Errors in Production (All Swimlanes)**Issue Summary:** On September 29, 2026, users across all Production regions experienced errors when accessing the Development Plan functionality within Guide. Affected users were temporarily unable to access or use…55 minResolved
Sep 27, 2026Schedule Infra Maintenance - EMEAThe scheduled maintenance has been completed.6h 0mScheduled
Sep 24, 2026Issue with Core User Management functionality in US SL4 accounts**Issue Summary:** On September 24, 2026, users in the US SL4 Production environment experienced an issue accessing the User Record page. Affected users were temporarily unable to access the page, resulting in…0 minResolved
Sep 24, 2026Content Studio Service Disruption in EU and FR EXT Production Swimlanes# Root Cause Analysis \(RCA\) **Issue Summary:** On September 24, 2026, users across the EU Production regions experienced HTTP 503 errors when accessing Content Studio. As a result, affected users were temporarily…24 minResolved
Sep 22, 2026504 timeout gateway error on Reporting 2.0 (US Swimlanes 1,2 and 5)**Issue Summary:** On September 22, 2026, users in the US Production environment experienced issues generating and accessing reports through Report Architect. Affected users were temporarily unable to generate or view…1h 20mResolved
Sep 21, 2026Minor Issue - Queue Latency - UK SL1Our Engineering Team has confirmed that the issue has been resolved. All background tasks in the queue have been completed, and processing is now operating as expected. Thank you for your patience and understanding!16h 41mResolved
Sep 19, 2026Patch 26.02.05 - CSOD Data Centers at USThe scheduled maintenance has been completed.2h 0mScheduled
Sep 19, 2026Patch 26.02.05 - CSOD Data Centers at EU/FR/UKThe scheduled maintenance has been completed.2h 0mScheduled
Sep 18, 2026Patch 26.02.05 - CSOD Data Centers at AU/JPThe scheduled maintenance has been completed.2h 0mScheduled
Sep 18, 2026Edge Import and Feed Issue for UK/Met**Incident Summary** On September 18th users in the UK , MetPol Production and Pilot environments experienced issues accessing the **Imports and Feeds** functionality. **Impact** Affected users were unable to access…57 minResolved
Sep 14, 2026Emails not processed on FRA SL1This incident has been resolved.3h 56mResolved
Sep 8, 2026Career Site is not unavailable for FRA SL1**Root Cause Analysis** ‌ **Incident Summary:** Between Sep. 3rd and Sep. 8th, 2026, there were three Production incidents that affected Career Site functionality. This issue was intermittent across the FRA SL1…27h 31mResolved
Sep 5, 2026Patch 26.02.04 - CSOD Data Centers at USThe scheduled maintenance has been completed.2h 0mScheduled
Sep 5, 2026Patch 26.02.04 - CSOD Data Centers at EU/FR/UKThe scheduled maintenance has been completed.2h 0mScheduled
Sep 4, 2026Minor Issue - Functionality - Error accessing xAPI Statement Viewer across FRA, UK, and US Swimlanes**Root Cause Analysis**   **Issue:** On September 4th, 2026, the xAPI service started returning errors during authentication of incoming requests. **Impact:** The issue prevented affected users from successfully…7h 50mResolved
Sep 4, 2026Patch 26.02.04 - CSOD Data Centers at AU/JPThe scheduled maintenance has been completed.2h 0mScheduled
Sep 3, 2026Major Issue: Career Site is not unavailable for FRA SL1**Root Cause Analysis** ‌ **Incident Summary:** Between Sep. 3rd and Sep. 8th, 2026, there were three Production incidents that affected Career Site functionality. This issue was intermittent across the FRA SL1…4h 19mResolved
Sep 3, 2026Minor Issue - Edge Import issues on CDG SL4**Root Cause Analysis**   **Incident Summary:** On September 2nd, 2026 at 10:05 PM PT, an issue was identified in the CDG SL4 Production environment impacting Edge Import functionality. **Impact:** Users…-141 minResolved
Sep 2, 2026Minor Issue - Latency - US Swimlanes**Issue Summary:** Across two separate incidents on September 1 and 2, 2026, customers in the US West region experienced application performance degradation, including increased response times and intermittent Gateway…20h 40mResolved
Sep 1, 2026Unable to login to the portal : US SL 5**Root Cause Analysis** **Incident Summary:** On September 1st, 2026, a Service Disruption across US SL5 Production environments prevented users from being able to log in. **Impact:** Users in the US SL5…41 minResolved
Aug 28, 2026Major Issue: Career Site is not unavailable for FRA SL1**Root Cause Analysis** ‌ **Incident Summary:** On August 28th, 2026, users in the FRA SL1 Production environment experienced intermittent issues accessing Career Site functionalities. **Impact:**…3h 2mResolved
Aug 27, 2026Career Site not accessible for CDG SL1**Root Cause Analysis**   **Incident Summary:** On August 27th, 2026, users in the CDG SL1 Production environment experienced intermittent issues accessing Career Site functionalities. **Impact:** Intermittent…-221 minResolved
Aug 26, 2026Resolved - Service Disruption**Root Cause Analysis**   **Incident Summary:** On August 25th, 2026, an issue was identified affecting select customers using the China Content Delivery Network \(CDN\). The issue impacted requests for specific web…0 minResolved
Aug 24, 2026Latency on US SL5**Issue Summary:** On August 24, 2026, users in the US SL5 Production environment experienced significant latency across multiple portals. The issue resulted in elevated response times and degraded portal…1h 15mResolved
Aug 22, 2026Patch 26.02.03 - CSOD Data Centers at USThe scheduled maintenance has been completed.2h 0mScheduled
Aug 22, 2026Patch 26.02.03 - CSOD Data Centers at EU/FR/UKThe scheduled maintenance has been completed.2h 0mScheduled
Aug 21, 2026Patch 26.02.03 - CSOD Data Centers at AU/JPThe scheduled maintenance has been completed.2h 0mScheduled
Aug 20, 2026Minor Issue - Edge Import failures (US SL)**Root Cause Analysis**   **Incident Summary:** Starting August 19th, 2026, customers across the US Production and Pilot environments experienced intermittent issues while accessing Employee Load functionality…-1753 minResolved
Aug 20, 2026Edge Import issues in UK swimlane**Issue Summary:** Starting August 20, 2026, users in the UK Production, Pilot, and Stage environments, including Metpol Production and Pilot, experienced disruption affecting Edge Import functionality. **Root…1h 3mResolved
Aug 20, 2026vILT Integrations Error in UK PRD & PIL**Root Cause Analysis** ‌ **Incident Summary:** On August 20th, 2026, users in the UK Production and Pilot environments, across all swimlanes, experienced issues creating VILT sessions. **Impact:** Users were…45 minResolved
Aug 19, 2026Major Issue - Career Site is not accessible for FRA SL1 swimlane**Root Cause Analysis**   **Incident Summary:** On August 19th, 2026, users in the EU Production environment experienced intermittent issues accessing Career Site functionalities. **Impact:** Users experienced…1h 3mResolved
Aug 17, 2026Unable to login to the portal via Multi Factor Authentication (MFA)Root Cause Analysis ‌ **Incident Summary:** On August 17th, 2026, customers across US Production environments experienced issues logging in due to Multi-Factor Authentication \(MFA\) failures. Affected users were…58 minResolved
Aug 10, 2026Issue with Core User Management functionality in US SL4 accounts**Incident Summary** Starting August 10th, 2026, users in the US RES PRD environment experienced intermittent issues with user management functionality and other portal functions dependent on core user…23h 48mResolved
Aug 10, 2026RESURFACED: Career site not accessible for All Swimlanes**Incident Summary** Starting August 10th, 2026, users experienced intermittent issues accessing the Career Site in the Frankfurt \(EU\), FR EXT\(CDG\) , FR RES\(CDG\) and UK \(all swimlanes\) Production…22h 2mResolved
Aug 10, 2026Major Issue - Career Site is not accessible for FRA SL1 swimlane**Incident Summary** Starting August 10th, 2026, users experienced intermittent issues accessing the Career Site in the Frankfurt \(EU\), FR EXT\(CDG\) , FR RES\(CDG\) and UK \(all swimlanes\) Production…1h 40mResolved
Aug 8, 2026Patch 26.02.02 - CSOD Data Centers at USThe scheduled maintenance has been completed.2h 0mScheduled
Aug 8, 2026Patch 26.02.02 - CSOD Data Centers at EU/FR/UKThe scheduled maintenance has been completed.2h 0mScheduled
Aug 7, 2026Patch 26.02.02 - CSOD Data Centers at AU/JPThe scheduled maintenance has been completed.2h 0mScheduled
Jul 27, 2026Minor Issue - Edge Import is not loading - US SL4**Issue Summary:** On July 27, 2026, beginning at approximately 7:58 a.m. Pacific Time, customers in the US SL4 environment experienced issues accessing Edge Import. Affected customers encountered prolonged page load…1h 28mResolved
Jul 25, 2026Release 26.02.01 - CSOD Data Centers at USThe scheduled maintenance has been completed.3h 0mScheduled
Jul 25, 2026Release 26.02.01 - CSOD Data Centers at EU/FR/UKThe scheduled maintenance has been completed.3h 0mScheduled
Jul 24, 2026Patch 26.02.01 - CSOD Data Centers at AU/JPThe scheduled maintenance has been completed.2h 0mScheduled
Jul 24, 2026Service Disruption**Root Cause Analysis \(RCA\)** ‌ **Incident Summary:** On July 23rd, 2026, users across the UK, JP, and EU Production environments experienced intermittent login failures. The issue primarily affected users…6h 37mResolved
Jul 21, 2026All Queued Events Stuck and Delayed across all Production Swimlanes**Root Cause Analysis** ‌ **Issue Summary:** There are backend processes in place that are designed to handle course and subscription updates reliably, without causing delays in downstream processing. During the…4h 55mResolved
Jul 19, 2026Schedule Infra Maintenance - USThe scheduled maintenance has been completed.6h 0mScheduled
Jul 15, 2026RESURFACED: No Jobs Displayed on Career Site for US Swimlanes (Production)**Issue Summary:** On July 13 and July 15, 2026, a production issue intermittently affected the Career Site experience across the US production swimlanes \(SL1, SL2, SL3, and SL5\). During the affected periods, some…118h 56mResolved
Jul 13, 2026No Jobs Displayed on Career Site for US Swimlanes (Production)**Issue Summary:** On July 13 and July 15, 2026, a production issue intermittently affected the Career Site experience across the US production swimlanes \(SL1, SL2, SL3, and SL5\). During the affected periods…18h 10mResolved
Jul 11, 2026Release 26.02.00 - CSOD Data Centers at USThe scheduled maintenance has been completed.3h 0mScheduled
Jul 11, 2026Release 26.02.00 - CSOD Data Centers at EMEAThe scheduled maintenance has been completed.3h 0mScheduled
Jul 10, 2026Release 26.02.00 - CSOD Data Centers at APACThe scheduled maintenance has been completed.1h 0mScheduled
Jul 7, 2026All Queued Events Stuck and Delayed**Issue Summary:** On July 7, 2026, users across all Production regions experienced intermittent service degradation due to elevated background processing activity. The increased workload temporarily affected platform…4h 31mResolved
Jul 5, 2026Schedule Infra Maintenance - APACThe scheduled maintenance has been completed.4h 0mScheduled
Jul 5, 2026Schedule Infra Maintenance - EMEAThe scheduled maintenance has been completed.6h 0mScheduled
Jun 29, 2026Intermittent Service Disruption on UK SL production**Incident Summary:** On June 28th, 2026, at 11:24 AM PT, users in the UK Production environment experienced intermittent service degradation impacting session management functionality. The issue resulted in reduced…3h 37mResolved
Jun 28, 2026Server Refresh Maintenance - EMEA/APAC/USThe scheduled maintenance has been completed.6h 0mScheduled
Jun 28, 2026Schedule Infra Maintenance - US GLX-US RES US PRDThe scheduled maintenance has been completed.6h 0mScheduled
Jun 22, 2026Minor Issue - LXP EU Prod 504 Gateway Timeout Error**Incident Summary:** On 22nd June 2026, users in the EU region experienced intermittent service degradation caused by DNS resolution failures. Our LXP applications were unable to reliably resolve internal service…-174 minResolved
Jun 17, 2026Minor Issue - Latency - UK Swimlanes**Incident Summary:** On June 17th, 2026, users in the UK \(SL1,SL2,SL3\) Production environment experienced brief latency. The issue primarily impacted platform responsiveness and request processing, resulting in…1h 53mResolved
Jun 17, 2026Minor Issue - Latency - US Swimlanes**Incident Summary:** Beginning in mid-April 2026, users in the US Production environment \(SL1, SL2, SL3, and SL5\) experienced intermittent 502 and 504 Gateway Timeout errors while accessing the platform. The issue…2h 13mResolved
Jun 16, 2026System latency observed in US Swimlanes Production Environment**Incident Summary:** On June 16th, 2026, users in the US \(SL1,SL2,SL3,SL5\) Production environment experienced intermittent latency and service degradation. The issue primarily impacted request processing and…-274 minResolved
Jun 14, 2026Schedule Infra Maintenance - USThe scheduled maintenance has been completed.6h 0mScheduled
Jun 12, 2026Minor Issue - Functionality - Edge Imports service unavailable | US SL4**Incident Summary:** On June 12th, 2026, users in the US RES Production environment experienced intermittent errors while accessing Edge Import services. The issue resulted in temporary service degradation and…40 minResolved
Jun 11, 2026The reporting 2.0 is returning zero results**Incident Summary:** On June 11th, 2026, clients in the US Production environment \(SL1, SL2, SL3, and SL5\) experienced intermittent reporting errors for a brief duration. During the incident window, users…59 minResolved
Jun 8, 2026Minor Issue - Latency CDG PRD SL1**Incident Summary:** On June 8th, 2026, clients in the FR EXT PRD environment experienced intermittent latency between 01:35 AM and 01:50 AM PT. During this period, users observed delayed responses and reduced…-31 minResolved
Jun 7, 2026Schedule Infra Maintenance - APACThe scheduled maintenance has been completed.4h 0mScheduled
Jun 7, 2026Schedule Infra Maintenance - EMEAThe scheduled maintenance has been completed.6h 0mScheduled
Jun 6, 2026Patch 26.01.06 - CSOD Data Centers at USThe scheduled maintenance has been completed.2h 0mScheduled
Jun 6, 2026Patch 26.01.06 - CSOD Data Centers at EU/FR/UKThe scheduled maintenance has been completed.2h 0mScheduled
Jun 5, 2026Patch 26.01.06 - CSOD Data Centers at AU/JPThe scheduled maintenance has been completed.2h 0mScheduled
Jun 3, 2026Intermittent Errors and Timeouts Observed on US Swimlanes**Incident Summary:** Beginning on June 1, 2026, some customers in the US Production environment, including SL1, SL2, SL3, and SL5, experienced periods of intermittent latency. The issue primarily affected platform…187h 41mResolved
Jun 2, 2026Minor Issue - Functionality - 504 errors when accessing Edge Import - US SL4**Incident Summary:** Between June 1st and June 2nd, 2026, users in the US RES Production environment experienced intermittent 504 Gateway Timeout errors while accessing Edge Import services. The issue resulted in…29h 59mResolved
Jun 2, 2026RESURFACED: Intermittent Timeouts Observed on US Production Environment**Incident Summary:** Beginning on June 1, 2026, some customers in the US Production environment, including SL1, SL2, SL3, and SL5, experienced periods of intermittent latency. The issue primarily affected platform…14h 45mResolved
Jun 1, 2026Minor Issue - Functionality - 504 errors when accessing Edge Import - US SL4**Incident Summary:** Between June 1st and June 2nd, 2026, users in the US RES Production environment experienced intermittent 504 Gateway Timeout errors while accessing Edge Import services. The issue resulted in…1h 57mResolved
Jun 1, 2026Intermittent timeouts observed on US Production Environment**Incident Summary:** Beginning on June 1, 2026, some customers in the US Production environment, including SL1, SL2, SL3, and SL5, experienced periods of intermittent latency. The issue primarily affected platform…8h 6mResolved
May 28, 2026Intermittent Reporting 2.0 Issues on US PROD Across Swimlanes**Incident Summary:** On May 28th, 2026, clients in the US Production environment \(SL1, SL2, SL3, and SL5\) experienced intermittent reporting errors for a brief duration. During the incident window, users…-127 minResolved
May 21, 2026Service Disruption: US SL4 – Login & 404 Error Issues**Incident Summary:** On May 21st, 2026, users in the US RES PRD environment experienced intermittent latency and portal login issues. The issue temporarily impacted portal responsiveness and user…2h 2mResolved
May 7, 2026UK SL2 - Error 500 on reporting 2.0**Issue Summary:** On May 6, 2026, users in the UK Production environment, including UK SL1, SL2, and SL3, experienced intermittent errors within Reporting 2.0. The issue occurred for a brief duration and resulted in…-391 minResolved
May 5, 2026Users Unable to Access Career Site (US Swimlanes)**Incident Summary:** Between May 4th and May 5th, 2026, the Career Site Service functionality in the US Production environment experienced intermittent errors across multiple swimlanes \(SL1, SL2, SL3, and SL5\). The…6h 59mResolved
May 4, 2026Users Unable to Access Career Site (US Swimlanes)**Incident Summary:** Between May 4th and May 5th, 2026, the Career Site Service functionality in the US Production environment experienced intermittent errors across multiple swimlanes \(SL1, SL2, SL3, and SL5\). The…24h 21mResolved
Apr 30, 2026Resurfaced: Unable to access reports in Reporting 2.0 (US Swimlanes Production Environment)**Incident Summary:** Starting April 13th, 2026, intermittent errors were observed in reporting functionality across US Production swimlanes \(SL1, SL2, SL3, and SL5\). **Root Cause Analysis \(RCA\):** The issue…34 minResolved
Apr 27, 2026Latency/intermittent timeouts observed on CDG SL1 Production Environment**Incident Summary:** On April 27th, 2026, clients in the FR EXT SL1 environment experienced intermittent service degradation for a brief duration. The issue resulted in intermittent request failures and impacted…0 minResolved
Apr 23, 2026Intermittent Timeouts on US SL4**Incident Summary:** On April 23rd, 2026, clients in the US RES Production environment experienced intermittent service degradation. During this period, users encountered intermittent request failures and partial…-521 minResolved
Apr 14, 2026Resurfaced: Unable to access reports in Reporting 2.0 (US Swimlanes Production Environment)**Incident Summary:** Starting April 13th, 2026, intermittent errors were observed in reporting functionality across US Production swimlanes \(SL1, SL2, SL3, and SL5\). **Root Cause Analysis \(RCA\):** The issue…235h 38mResolved
Apr 13, 2026Unable to access reports in Reporting 2.0 (US Swimlanes Production Environment)**Incident Summary:** Starting April 13th, 2026, intermittent errors were observed in reporting functionality across US Production swimlanes \(SL1, SL2, SL3, and SL5\). **Root Cause Analysis \(RCA\):** The issue…4h 6mResolved
Mar 30, 2026Intermittent Errors on Manage Candidates Page - US Swimlanes**Incident Summary:** On March 30th, 2026, the US PRD environment experienced intermittent issues impacting the Manage Candidate module. During this time, users were intermittently unable to access or use the…3h 39mResolved
Mar 26, 2026Emergency Maintenance - Edge Import & Bulk API - US Swimlanes**Issue Summary:** On March 22, 2026, Edge import–related errors were observed across the US Production swimlanes \(US SL1, US SL2, US SL3, US SL5\). **Root Cause:** The issue was caused by instability within the…3h 25mResolved
Mar 19, 2026System latency observed in US Swimlanes Production Environment**Incident Summary:** Since March 11th, 2026, clients have been experiencing intermittent timeouts while accessing portals across US Swimlanes \(US SL1/2/3/5\). **Root Cause Analysis \(RCA\):** The issue was…24h 0mResolved
Mar 16, 2026Minor Issue - Latency for all Galaxy Clients across UK and EU Region**Incident Summary:** On March 16th, 2026, clients in the Europe PRD \(FRA SL1, CDG SL1, UK SL1, SL2, SL3\) region experienced a service disruption impacting Cornerstone, resulting in login failures and access…2h 58mResolved
Mar 4, 2026Minor Issue - Latency - FRA SL1**Issue Summary:** On March 4, 2026, users experienced intermittent latency while accessing the platform hosted in the FRA PRD SL1 environment. During this period, some requests took longer than expected to process…0 minResolved
Mar 4, 2026Intermittent Latency and Errors Across Application - US Swimlanes**Issue Summary:** Between February 26 and March 12, 2026, users experienced intermittent latency while accessing the platform hosted in the US SL1, SL2, SL3, and SL5 environments. During this period, some requests…75h 30mResolved
Mar 3, 2026Latency on FRA SL1 Production**Issue Summary:** On March 3, 2026, users experienced intermittent latency while navigating the portal hosted in the FRA SL1 environment. During the incident window, some users encountered slow responses and…-191 minResolved
Mar 2, 2026Minor Issue - Careers Site Down - US SL2**Issue Summary:** On March 2, 2026, clients hosted in the US SL2 Production environment experienced a temporary service disruption affecting the Career Site. During the incident window, users encountered intermittent…-11 minResolved
Feb 28, 2026Service Disruption: US SL1 PRD - Service Unavailable Getting SSL Error**Issue Summary:** On February 28, 2026, users experienced intermittent service availability while accessing the portal hosted in the US SL1 Production environment. During the incident window, some users encountered…7h 15mResolved
Feb 26, 2026Latency observed in CSX for US Swimlanes Production Environment**Issue Summary:** Between February 26 and March 12, 2026, users experienced intermittent latency while accessing the platform hosted in the US SL1, SL2, SL3, and SL5 environments. During this period, some requests…-51 minResolved
Feb 24, 2026Latency Observed on LMS Pages Across EU Production (Galaxy Customers)**Issue Summary:** On February 24, 2026, elevated latency was observed in the EU region, resulting in degraded platform performance. During the affected period, users experienced slower response times while accessing…5h 55mResolved
Feb 23, 2026Latency Observed on LMS Pages Across All US Swimlanes (Galaxy Customers Only)**Issue Summary:** On February 23, 2026, increased latency was observed across all U.S. swimlane environments due to an issue with an internal service that depends on a third-party database service \(ArangoDB\). The…5h 59mResolved
Feb 17, 2026Service Disruption: CDG SL1 : 'Service Unavailable' Error while accessing/working on the platform**Incident Summary:** On February 17th, 2026, users were unable to log in to the portal hosted in the CDG SL1 \(AWS\) environment. During the impact window users encountered Service Unavailable errors. **Impact:**…3h 22mResolved
Feb 9, 2026Career Site Returning an Error (February 9th) - US SLs**Incident Summary:** On February 9th, 2026, clients hosted in the US Production environments \(SL1, SL2, SL3, and SL5\) experienced a temporary service disruption affecting the Career Site. **Impact:** During the…57 minResolved
Jan 30, 2026Service Disruption: US SL4 – Login & 404 Error Issues**Issue Summary:** On January 30, 2026, clients hosted in the US SL4 Production environment experienced a temporary service disruption following scheduled maintenance activities. During the affected window, some users…3h 9mResolved
Jan 29, 2026Latency on US PRD SL2**Issue Summary:** On January 29, 2026, clients hosted in the US SL2 Production environment experienced service degradation that impacted overall platform responsiveness. During the affected period, users encountered…1h 28mResolved
Jan 28, 2026Intermittent Timeouts on US SL2**Issue Summary:** On January 28, 2026, clients hosted in the US SL2 Production environment experienced periods of degraded portal performance. During the affected window, users encountered intermittent latency and…4h 24mResolved
Jan 27, 2026Intermittent Galaxy Latency**Incident Summary:** Between January 14 and January 27, 2026, some users accessing LXP EU PRD 02 experienced intermittent latency while navigating the application. During this time, users experienced slower page…65h 14mResolved
Jan 26, 2026Minor Issue - Intermittent Service Disruption on US SL3 environments**Incident Summary:** On January 25th, 2026, clients hosted in the US SL3 Production environment experienced temporary portal access issues. **Impact:** During the incident window, users encountered timeout errors…-1959 minResolved
Jan 22, 2026Global Search Not Working - UK swimlane**Incident Summary:** On January 22nd, 2026, clients hosted in UK PRD SL1, SL2, and SL3 experienced an issue affecting Global Search and Reporting services. **Impact:** During the incident window, users were unable…6h 23mResolved
Jan 20, 2026Issues Loading Application and Training - US SL5**Incident Summary:** Between January 20th and January 21st, 2026, clients hosted in US PRD SL5 experienced an issue where training content was unable to load within the portal. **Impact:** Affected users were…49h 31mResolved

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How to Read This Cornerstone Incident Log

Each row is an incident PulsAPI observed, not a summary written afterwards. The duration is wall-clock time between the first failing check and the first clean one, so it includes the window before Cornerstone acknowledged anything. Vendor post-mortems typically measure from acknowledgement, which is why their numbers are usually shorter.

Incidents still open have no duration yet and are listed as ongoing rather than being given a running total. The archive covers the last 365 days; anything older has aged out of the window rather than never having happened.

The longest single Cornerstone outage in this window ran 9d 19h, against a mean recovery of 11h 28m. If you depend on Cornerstone in a customer-facing path, the longest figure is the one to design around. The mean is what happens on a normal bad day; the maximum is what happens on the worst one.