Issue Summary

In Confluence 10, apps and modules enabled status are persisted in PLUGIN_SETTING.

Updating apps in Confluence Administration » Manage Apps in a multi-node Cluster can revert apps and modules back to their default state.

Example:

• Without an entry in PLUGIN_SETTING for namespace=plugin.manager.state.Map:
  • Apps revert to Enabled
  • Some internal modules such as confluence.macros.html:html-include revert to disabled

Steps to Reproduce

1. Install Confluence Data Center with at least 3 nodes (the more nodes, the more likely the issue will occur)
2. Install several Apps that are older than the latest (so that the Update button appears). e.g.
   • https://marketplace.atlassian.com/download/app/com.gliffy.integration.confluence/9003001007761/DATACENTER/artifact
   • https://marketplace.atlassian.com/download/app/nl.avisi.confluence.plugins.numberedheadings/300002270/DATACENTER/artifact
   • https://marketplace.atlassian.com/download/app/de.scandio.confluence.plugins.hideelements-macro/500100100/DATACENTER/artifact
   • https://marketplace.atlassian.com/download/app/com.onresolve.confluence.groovy.groovyrunner/400300108460/DATACENTER/artifact
   • https://marketplace.atlassian.com/download/app/com.mxgraph.confluence.plugins.diagramly/1600000100/DATACENTER/artifact
   • https://marketplace.atlassian.com/download/app/biz.artemissoftware.confluence.multiexcerpt.MultiExcerptMacro/5002003210/DATACENTER/artifact
   • https://marketplace.atlassian.com/download/app/com.adaptavist.confluence.contentFormattingMacros/900002301/DATACENTER/artifact
   • https://marketplace.atlassian.com/download/app/com.simplenia.confluence.plugins.polls/400000080/DATACENTER/artifact
   • https://marketplace.atlassian.com/download/app/de.scandio.confluence.plugins.task-reminder/400000000/DATACENTER/artifact
   • https://marketplace.atlassian.com/download/app/tableau-plugin/734/DATACENTER/artifact
   • https://marketplace.atlassian.com/download/app/de.griffel.confluence.plugins.plant-uml/90202601011/DATACENTER/artifact
3. Once installed, disable all the Apps in Manage Apps screen
   
4. Once all the apps are disabled, pick any outdated app (such as Confluence Cloud Migration Assistant) and press Update
5. Perform a rolling restart of Confluence
6. Check the app status in Confluence Administration » Manage Apps

Expected Results

All the installed third party apps (that were disabled) should remain as disabled

Actual Results

1. Once an app is updated, it will broadcast for other nodes to update the app on their local nodes.
   
   • This occurs simultaneously across the cluster, leading to conflicts when nodes read from or write to PLUGIN_SETTING with random rows inadvertently removed
2. Random apps are inadvertently re-enabled
   • If the issue does not occur, attempt another App update (the more nodes, the more likely the issue will occur)
     
3. Checking atlassian-confluence.log will show either of these errors:

   2026-09-04 06:55:23,766 WARN [nc.confluence.event-1] [confluence.impl.hibernate.ConfluenceHibernateTransactionManager] doCommit Commit failed. Rolling back. Error: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1; statement executed: delete from PLUGIN_SETTING where NAMESPACE=? and SETTING_KEY=?
   2026-09-04 06:55:23,772 WARN [nc.confluence.event-1] [confluence.impl.hibernate.ConfluenceHibernateTransactionManager] doRollback Performing rollback. Transactions:\n  ->[org.springframework.data.jpa.repository.support.SimpleJpaRepository.deleteById]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (Session #2140378009)
   2026-09-04 06:55:23,796 ERROR [nc.confluence.event-1] [confluence.impl.plugin.PluginSettingsPluginStateStore] save Exception when saving plugins state to the database. Saving to in memory state.
   org.springframework.orm.hibernate5.HibernateOptimisticLockingFailureException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1; statement executed: delete from PLUGIN_SETTING where NAMESPACE=? and SETTING_KEY=?
   	at org.springframework.orm.hibernate5.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:247)
   	at org.springframework.orm.hibernate5.HibernateTransactionManager.convertHibernateAccessException(HibernateTransactionManager.java:788)
   	at org.springframework.orm.hibernate5.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:658)
   ..
   	at jdk.proxy4/jdk.proxy4.$Proxy239.deleteById(Unknown Source)
   	at com.atlassian.confluence.impl.settings.ConfluencePluginSettings.removeActual(ConfluencePluginSettings.java:202)
   	at com.atlassian.sal.core.pluginsettings.AbstractStringPluginSettings.remove(AbstractStringPluginSettings.java:166)
   	at com.atlassian.confluence.impl.settings.ConfluencePluginSettings.remove(ConfluencePluginSettings.java:192)
   ..
   	at com.atlassian.plugin.manager.store.DelegatingPluginPersistentStateStore.save(DelegatingPluginPersistentStateStore.java:21)
   	at com.atlassian.confluence.impl.plugin.CachingPluginPersistentStateStore.save(CachingPluginPersistentStateStore.java:32)
   ..
   	at com.atlassian.confluence.impl.plugin.ConfluencePluginManager.processClusteredInstallEvent(ConfluencePluginManager.java:225)
   	at com.atlassian.confluence.impl.plugin.ConfluencePluginManager.processPluginEvent(ConfluencePluginManager.java:187)
   	at com.atlassian.confluence.impl.plugin.ConfluencePluginManager.onClusterEvent(ConfluencePluginManager.java:152)
   

   2026-09-04 08:27:59,366 WARN [nc.confluence.event-1] [confluence.impl.plugin.PluginSettingsPluginStateStore] lambda$load$1 Unable to deserialize plugin state entry for key hash d18349d2ec626b530312c5ee7a3039ca. Skipping entry. Error: Cannot invoke \"com.atlassian.confluence.impl.plugin.PluginSettingsPluginStateStore$PluginStateStoreEntry.getKey()\" because \"stateEntry\" is null
   

Workaround

1. Scale the Cluster down to one node before updating Apps.
2. Once all the required apps are updated, scale Confluence back to the required number of nodes