--- sourceDocument: yokohama Combined Product Files sourceDocumentLink: https://www.servicenow.com/docs/r/yokohama/delta-xanadu-yokohama Release : - yokohama ft:locale : - en-US ft:publication_title : - yokohama Combined Product Files ft:clusterId : - delta3yx bundleId : - delta3yx --- # Combined Hermes Messaging Service release notes for upgrades from Xanadu to Yokohama # Combined Hermes Messaging Service release notes for upgrades from Xanadu to Yokohama {#ariaid-title1} Release version: Yokohama Updated October 8, 2026 ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 3 minutes to read Summarize ![AI sparkle icon](https://servicenow.com/docs/portal-asset/ai-sparkle-icon) Summarized using AI This content was generated using new OpenAI-powered functionality. Results are provided on an as is basis and are not guaranteed to be accurate or complete. ## Summary of Combined Hermes Messaging Service release notes for upgrades from Xanadu to Yokohama This consolidated release notes document provides ServiceNow customers with all the key updates, features, changes, and activation details for the Hermes Messaging Service from the Xanadu to the Yokohama release. It is designed to help you prepare for and smoothly execute your upgrade by summarizing relevant enhancements and instructions across these versions. Show full answer Show less ## Key Features * **From Xanadu Release:** * Monitor Hermes data usage at the application and topic level through the Hermes Usage Dashboard. * Publish and consume high volumes of Apache Kafka events with low latency, managing message spikes to protect instance performance. * Manage message delivery health and performance using Hermes diagnostic tools. * **From Yokohama Release:** * Track and view audit history for all Hermes topic operations to enhance traceability. * Search and filter messages within topics using keywords or regular expressions via the topic inspector. * Monitor the health of Hermes components over time for proactive diagnostics. ## Key Changes * **Xanadu:** * Enhanced support for monitoring topics and testing connectivity across multiple cluster sets by selecting service groups in Hermes Topic Inspector and Diagnostics modules. * **Yokohama:** * No changes or updates recorded in this release. ## Activation and Requirements Hermes Messaging Service activation is consistent across Xanadu and Yokohama releases. It requires enabling the ServiceNow Stream Connect Installer plugin (com.glide.hub.streamconnect.installer) or installing the Log Export Service application. No additional browser requirements, localization, accessibility changes, or new prerequisites were introduced between these releases. ## Practical Implications for ServiceNow Customers * Upgrading to Yokohama enables improved auditing and message inspection capabilities for Hermes topics, supporting better compliance and troubleshooting. * You can leverage enhanced diagnostics to monitor Hermes health trends over time, helping maintain reliable messaging infrastructure. * The existing features from Xanadu, including multi-cluster monitoring and Kafka integration, remain available, ensuring continuity and scalability. * Since no features were deprecated or removed, your current configurations and workflows should remain compatible post-upgrade. Consolidated page of all release notes for Hermes Messaging Service from Xanadu to Yokohama. ## How to use this page To help you prepare for your upgrade, we have combined the cross-family Hermes Messaging Service release notes onto one page. Read this summary of the new features, changes, and updated information for your product from Xanadu to Yokohama. Tip: If there were no updates for a release notes section in a certain family release, we included a short note for your reference. For example, if a product did not have any updates in Tokyo, the row says "No updates for this release." ## Important information for upgrading Hermes Messaging Service to Yokohama Before you upgrade to Yokohama, review these pre- and post-upgrade tasks and complete the tasks as needed. {#dfrn3-hermesmessagingservice-summary__entry__2} | Release | Release notes | |-|-| | Xanadu | No updates for this release. | | Yokohama | No updates for this release. | [ ] ## New features Between your current release family and Yokohama, new features were introduced for Hermes Messaging Service. {#dfrn3-hermesmessagingservice-summary__entry__8} | Release | Release notes | |-|-| | Xanadu | [Monitor Hermes data usage](https://www.servicenow.com/docs/access?context=monitoring-data-usage-hermes&family=xanadu&ft:locale=en-US) : Monitor data usage by application and track data usage by topic using the Hermes Usage Dashboard. | | Yokohama | [Topic audit history](https://www.servicenow.com/docs/access?context=view-messages-hermes-topic&family=yokohama&ft:locale=en-US) : Track changes made to a Hermes topic by viewing the topic's audit information. [Search for messages in a topic](https://www.servicenow.com/docs/access?context=view-messages-hermes-topic&family=yokohama&ft:locale=en-US) : Filter messages in a topic using keywords or regular expressions in the Hermes Messaging Service topic inspector. [Improved diagnostics](https://www.servicenow.com/docs/access?context=run-hermes-messaging-service-diagnostics&family=yokohama&ft:locale=en-US) : Monitor the health of Hermes components over time. | [ ] ## Changes Between your current release family and Yokohama, some changes were made to existing Hermes Messaging Service features. {#dfrn3-hermesmessagingservice-summary__entry__14} | Release | Release notes | |-|-| | Xanadu | [Monitor topics in multiple cluster sets](https://www.servicenow.com/docs/access?context=view-messages-hermes-topic&family=xanadu&ft:locale=en-US) : View messages from multiple cluster sets by selecting a service group in the Hermes Topic Inspector module. [Test connectivity to multiple cluster sets](https://www.servicenow.com/docs/access?context=run-hermes-messaging-service-diagnostics&family=xanadu&ft:locale=en-US) : Verify that your instance can send messages to and receive messages from multiple cluster sets by selecting a service group in the Hermes Diagnostics module. | | Yokohama | No updates for this release. | [ ] ## Removed Between your current release family and Yokohama, some Hermes Messaging Service features or functionality were removed. {#dfrn3-hermesmessagingservice-summary__entry__20} | Release | Release notes | |-|-| | Xanadu | No updates for this release. | | Yokohama | No updates for this release. | [ ] ## Deprecations Between your current release family and Yokohama, some Hermes Messaging Service features or functionality were deprecated. {#dfrn3-hermesmessagingservice-summary__entry__26} | Release | Release notes | |-|-| | Xanadu | No updates for this release. | | Yokohama | No updates for this release. | [ ] ## Activation information Review information on how to activate Hermes Messaging Service. {#dfrn3-hermesmessagingservice-summary__entry__32} | Release | Release notes | |-|-| | Xanadu | Hermes Messaging Service is a ServiceNow AI Platform feature that is available with activation of the ServiceNow Stream Connect Installer (com.glide.hub.stream_connect.installer) plugin or installation of the Log Export Service application. For details, see [Hermes Messaging Service activation](https://www.servicenow.com/docs/access?context=hermes-messaging-service-activation&family=xanadu&ft:locale=en-US). | | Yokohama | Activation information : Hermes Messaging Service is a ServiceNow AI Platform feature that is available with activation of the ServiceNow Stream Connect Installer (com.glide.hub.stream_connect.installer) plugin or installation of the Log Export Service application. For details, see [Hermes Messaging Service activation](https://www.servicenow.com/docs/access?context=hermes-messaging-service-activation&family=yokohama&ft:locale=en-US). | [ ] ## Additional requirements If any additional requirements were introduced or changed for Hermes Messaging Service we have noted them here. {#dfrn3-hermesmessagingservice-summary__entry__38} | Release | Release notes | |-|-| | Xanadu | No updates for this release. | | Yokohama | No updates for this release. | [ ] ## Browser requirements If any specific browser requirements were introduced or changed for Hermes Messaging Service we have noted them here. {#dfrn3-hermesmessagingservice-summary__entry__44} | Release | Release notes | |-|-| | Xanadu | No updates for this release. | | Yokohama | No updates for this release. | [ ] ## Accessibility information Review details on accessibility information for Hermes Messaging Service, such as specific requirements or compliance levels. {#dfrn3-hermesmessagingservice-summary__entry__50} | Release | Release notes | |-|-| | Xanadu | No updates for this release. | | Yokohama | No updates for this release. | [ ] ## Localization information If there are specific localization considerations for Hermes Messaging Service we have noted them here. {#dfrn3-hermesmessagingservice-summary__entry__56} | Release | Release notes | |-|-| | Xanadu | No updates for this release. | | Yokohama | No updates for this release. | [ ] ## Highlight information If there are specific highlight considerations for Hermes Messaging Service we have noted them here. {#dfrn3-hermesmessagingservice-summary__entry__62} | Release | Release notes | |-|-| | Xanadu | * Publish events from your ServiceNow instance to your Apache Kafka environment and consume high volumes of Apache Kafka events from your external systems with low latency. * Effectively process spikes and bursts in message volume from external systems to minimize performance impacts on your instance. * Manage the health and performance of message delivery using Hermes diagnostic tools. See [Hermes Messaging Service](https://www.servicenow.com/docs/access?context=hermes-messaging-service&family=xanadu&ft:locale=en-US) for more information. | | Yokohama | * View the audit history for all topic operations. * Scan and inspect topic messages using keywords or regular expressions. * Monitor the health of Hermes components over time. See [Hermes Messaging Service](https://www.servicenow.com/docs/access?context=hermes-messaging-service&family=yokohama&ft:locale=en-US) for more information. | [ ]