Facing user and group sync issue in Confluence Data Center

[Gnana Siva Sai Jalluri]

Hi All,

Seeeing the below logs in atlassian-confluence-security.log

2025-04-30 02:52:48,405 INFO [Caesium-1-2] [atlassian.crowd.directory.DirectoryCacheImplUsingChangeOperations] shouldSkipSyncingGroupMembers Skipping update of group 'cug-wiki-ReuseDecisionEngine-edit' due to the group being removed from the cache in the mean time.

Help me how we can resolve this?

Confluence Data Center Version  8.5.12

[Piyush Annadate _ACE Pune_]

Hello @Gnana Siva Sai Jalluri ,
Welcome to the Community !
Based on error message, below is possibilities and your actions !!

Possibilities:

• Group being deleted or renamed during sync.

• Race condition during large or overlapping directory syncs.

• Crowd/LDAP directory performance issues, e.g., slow sync causing stale cache entries.

• Incorrect directory configuration, where groups are unstable (added/removed frequently). 
  

You may perform the below actions:

1. Confirm Group Presence

Check if the group cug-wiki-ReuseDecisionEngine-edit actually exists in your user directory (LDAP, Crowd, etc.).

2. Review Directory Sync Settings

Go to:

• Confluence Admin → User Directories

• Review the sync frequency, caching settings, and the specific directory the group comes from.

If you have multiple directories or large user base, reduce sync concurrency issues by adjusting:

 atlassian.user.crowd.sync.group.threads = 1

in confluence.cfg.xml (or via system properties) to serialize group sync.

3. Enable Debug Logging for Sync

To see more about group sync:

Go to Logging and Profiling → Add logger:

Class: com.atlassian.crowd.directory
Level: DEBUG