New Delhi I (ZSN) and Mumbai VI (ZS3) Data center Issue

Zscaler has detected an issue with our New Delhi I data center on zscaler.net cloud and Mumbai VI data center on zscalerthree.net cloud and is currently investigating the matter.  Customers may encounter disconnections, periods of slowness or increased latency. If you’re currently experiencing any traffic impacting issues please failover to your secondary DC or any other alternate DC. For more information, please refer to the following support article. We will continue to provide updates here as the investigation progresses. For detailed updates, please check the Service Status section in your Zscaler customer support portal (CSP). Status changes and additional details will be posted there as they become available.Latest Update - Thu, 11 Jun 2026 20:58:57 UTCZscaler has completed the validation review of the updated software build, and the results continue to be positive. Service health and platform stability have remained consistent throughout the observation period, with no significant resource utilization concerns identified. Based on the successful validation results, Zscaler has initiated phased deployment of the software update across the remaining affected service components within the impacted data centers. Zscaler will continue to closely monitor service health and platform performance throughout the deployment process and will provide additional updates as rollout activities progress.Update - Fri, 05 Jun 2026 15:19:22 UTCZscaler is prioritizing the issue and is actively working to isolate the problem and identify the root cause. We appreciate your patience and understanding during this investigation. Additional updates will be provided as more information becomes available.Update - Fri, 05 Jun 2026 18:47:27 UTCZscaler teams are actively working to identify the cause and apply mitigation as needed. We will provide additional updates as soon as more information becomes availableUpdate - Fri, 05 Jun 2026 23:09:55 UTCZscaler has identified conditions contributing to this issue and continues to investigate to validate findings and determine any additional contributing factors. Current monitoring indicates that the behavior remains intermittent in nature. Zscaler teams continue to assess the identified conditions and evaluate corrective actions as needed. We will continue to provide updates as more information becomes available.Update - Mon, 08 Jun 2026 12:12:13 UTCZscaler is prioritizing the issue and is actively working to isolate the problem and identify the root cause. We appreciate your patience and understanding during this investigation. Additional updates will be provided as more information becomes available.Update - Mon, 08 Jun 2026 13:46:58 UTCThe incident title and the impacted data center and cloud details have been updated to include the Mumbai VI data center on zscalerthree.net as well. Zscaler is treating this issue with high priority and is actively working to isolate the problem and identify the root cause. We appreciate your patience and understanding while the investigation is ongoing. Additional updates will be provided as more information becomes available.Update - Mon, 08 Jun 2026 21:17:39 UTCZscaler has identified a software defect that may be contributing to the observed behavior and is currently validating a corrective update. As part of this validation effort, a limited deployment is being planned while teams continue to monitor service health and assess impact. We will provide additional updates as more information becomes available.Update - Tue, 09 Jun 2026 06:32:06 UTCZscaler has scheduled an initial limited deployment of the corrective software update for late Tuesday (UTC). Following successful validation of this initial rollout, we plan to extend the deployment to additional affected infrastructure starting Thursday and continuing through the weekend. Zscaler remains actively engaged in monitoring service health, and we will provide further updates as deployment activities progress.Update - Wed, 10 Jun 2026 00:02:13 UTCZscaler has successfully completed the initial limited deployment of the corrective software update intended to address the observed service instability. The update is currently undergoing validation within a targeted subset of the affected service components, and Zscaler is closely monitoring service health and system performance to assess its effectiveness. Pending successful validation, deployment of the update to the remaining affected service components will proceed in phases. We will continue to provide updates as validation and deployment activities progress.Update - Wed, 10 Jun 2026 07:23:33 UTCZscaler has concluded the validation phase for the recent software update deployment. During this period, monitoring indicated that the update did not meet our performance and stability standards. To prioritize service health, our teams are currently rolling back the update from the targeted components. In parallel, Zscaler has taken additional steps to temporarily mitigate the impact across the affected infrastructure, and we are closely monitoring the environment for stability. Zscaler is also actively analyzing diagnostic data gathered during the validation phase to refine the software fix. If you continue to experience slowness, please contact Zscaler Support. We will provide further updates as our investigation and mitigation efforts progress.Update - Wed, 10 Jun 2026 23:23:40 UTCFollowing additional analysis and refinement efforts, Zscaler has deployed an updated software build to a limited subset of the affected service components as part of a controlled validation process. Initial observations following deployment are encouraging, and Zscaler is continuing to closely monitor service health and system performance. Validation activities remain ongoing, including observation during regional business hours to ensure stability under increased traffic volumes. We will continue to provide updates as validation progresses and additional information becomes available.Update - Thu, 11 Jun 2026 03:00:20 UTCZscaler has observed promising results from the initial validation of the updated software build, with targeted components demonstrating improved stability. Based on these positive indicators, we have expanded the deployment to an additional subset of the affected infrastructure for further validation. Our teams are currently allowing the update to soak while closely monitoring service health to ensure continued stability under varied traffic conditions. Pending successful completion of this extended validation period, we will determine a timeline for deployment across the remaining impacted infrastructure. We will continue to provide updates as deployment activities progress.Update - Thu, 11 Jun 2026 06:33:07 UTCThe recently deployed software update continues to demonstrate positive results during its expanded validation phase. Service health and system memory usage remain stable compared to the previous day. Zscaler continues to closely monitor the environment under varying production traffic loads. Zscaler will continue to provide periodic updates as data center monitoring and validation activities progress, and as subsequent deployment decisions are made.Update - Thu, 11 Jun 2026 20:58:57 UTCZscaler has completed the validation review of the updated software build, and the results continue to be positive. Service health and platform stability have remained consistent throughout the observation period, with no significant resource utilization concerns identified. Based on the successful validation results, Zscaler has initiated phased deployment of the software update across the remaining affected service components within the impacted data centers. Zscaler will continue to closely monitor service health and platform performance throughout the deployment process and will provide additional updates as rollout activities progress.