DocumentationAEM 6.5User Guide

Troubleshooting MSM Issues and FAQ troubleshooting-msm

Last update: Thu Sep 14 2023 00:00:00 GMT+0000 (Coordinated Universal Time)

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Troubleshooting First Steps first-steps

If you are experiencing what you think is incorrect behavior or an error in MSM, before beginning and detailed troubleshooting be sure to:

  • Check the MSM FAQ as your problems or questions may already be addressed there.
  • Check the MSM best practices article as several tips are offered there along with clarifications of some misconceptions.

Finding advanced information about your blueprint and Live Copy status advanced-info

MSM registers several servlets that can be requested with selectors on the resource URLs. These are used by the UI but can also be requested directly to see directly additional advanced computed MSM statuses for your pages:

  1. http://<host>:<port>/content/path/to/bluprint/page.blueprint.json?&maxSize=500&advancedStatus=true&returnRelationships=true&msm%3Atrigger=ROLLOUT

    • Use this on a blueprint page to retrieve the list of all Live Copies linked to it, with additional Live Copy status information.
    • for example:
      http://localhost:4502/content/wknd/language-masters/en.blueprint.json?&maxSize=500&advancedStatus=true&returnRelationships=true&msm%3Atrigger=ROLLOUT

  2. http://<host>:<port>/content/path/to/livecopy/page.msm.json

    • Use this on Live Copy pages to retrieve advanced information on their connection with their blueprint pages. If the page is not a Live Copy, nothing is returned.
    • for example:
      http://localhost:4502/content/wknd/ca/en.msm.json

Those servlets generate DEBUG Log messages through the com.day.cq.wcm.msm logger that can also be helpful.

Checking MSM-specific information in the repository checking-repo

The prior servlets returned computed information based on the MSM-specific nodes and mixins. The information is stored in the repository in the following way.

  • cq:LiveSync mixin type

    • This is set on jcr:content nodes and define root Live Copy pages.

    • Those pages have a cq:LiveSyncConfig child node of type cq:LiveCopy that contain basic and mandatory information on the Live Copy through the following properties:

      • cq:master points to the blueprint page of the Live Copy.
      • cq:rolloutConfigs indicates active rollout configurations applied to the Live Copy.
      • cq:isDeep is true if the child pages of this root Live Copy page are included in the Live Copy.

  • cq:LiveRelationship mixin type

    • Any Live Copy page has such a mixin type on its jcr:content node.
    • If it does not, the page at some point has been detached or manually created via the authoring interface outside of a Live Copy action (create or roll out).

  • cq:LiveSyncCancelled mixin type

    • Added to jcr:content nodes of Live Copy pages that were suspended.
    • If the suspension is effective for child pages as well, a cq:isCancelledForChildren property is set to true on the same node.

The information present in these properties should be reflected in the UI, however when troubleshooting it may be helpful to observe MSM behavior directly in the repository as MSM actions occur.

Knowing those properties can also be useful to query your repository and find out sets of pages that are in particular states. For example:

  • select * from cq:LiveSync returns all Live Copy root pages.

FAQ faq

Here are some frequently asked questions related to MSM and Live Copy.

Why are some properties (for example, title, annotations) are not updated during an MSM rollout? missing-properties

MSM sync actions are highly configurable. Which properties or components are modified during rollouts directly depends on the properties of those configurations.

See this article for more information on this topic.

How can I remove rollout permissions for a group of authors? remove-rollout-permissions

There is no rollout privilege that can be set or removed for AEM principals (users or groups).

As an alternative you can either:

  • Customization the product UI to hide the Rollout actions for a given principal.
  • Remove write privileges from the Live Copy tree for authors who are not allowed to roll out.

Why do I see Live Copy pages with the suffix “_msm_moved”? moved-pages

If a blueprint page is rolled out, it either updates its Live Copy page or creates a new Live Copy page if it didn’t exist yet. For example, when it is rolled out for the first time or the Live Copy page was manually deleted.

In this latter case however, if a page without a cq:LiveRelationship property exists with the same name, this page is renamed before the Live Copy page is created.

By default, the rollout expects a linked Live Copy page, to which the updates of the blueprints are rolled out. Or, it expects no page at all, when a Live Copy page is created.

If a “standalone” page is found, MSM chooses to rename this page, and create a separate, linked Live Copy page.

Such a standalone page in a Live Copy subtree is typically the result of a Detach operation, or the former Live Copy page was manually deleted by an author and then re-created with the same name.

To avoid this, use the Live Copy Suspend feature instead of Detach. More details on the Detach action can be found in this article.

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