Jira-Crowd: Synchronisation failed: Incremental synchronisation is not available. Falling back to f
Asked by Nicol?s Guzm?n:

I have configured a unique Crowd directory in Jira Server with the following configuration:

![image.png](/t5/image/serverpage/image-id/174146iB1C424212007BB13/image-dimensions/503x273?v=v2 "image.png")

Since yesterday, when we try to synchronize we get the following error message:
> Synchronisation failed. See server logs for details.

We have checked the atlassian-jira.log file and found out the following trace. We don?t understand what is going on and we really appreciate it if somebody her can give us an advice:

```
2-15 15:38:38,758+0100 Caesium-1-1 INFO ServiceRunner [c.a.crowd.directory.DbCachingRemoteDirectory] INCREMENTAL synchronisation for directory [ 10500 ] starting
2021-12-15 15:38:38,758+0100 Caesium-1-1 INFO ServiceRunner [c.a.crowd.directory.DbCachingRemoteDirectory] Attempting INCREMENTAL synchronisation for directory [ 10500 ]
2021-12-15 15:38:38,758+0100 Caesium-1-1 DEBUG ServiceRunner [c.a.c.d.ldap.cache.EventTokenChangedCacheRefresher] A full synchronisation is needed to obtain the current token event
2021-12-15 15:38:38,758+0100 Caesium-1-1 INFO ServiceRunner [c.a.crowd.directory.DbCachingRemoteDirectory] Incremental synchronisation for directory [ 10500 ] was not completed, falling back to a full synchronisation
2021-12-15 15:38:38,758+0100 Caesium-1-1 INFO ServiceRunner [c.a.crowd.directory.DbCachingRemoteDirectory] INCREMENTAL synchronisation for directory [ 10500 ] was not successful, attempting FULL
2021-12-15 15:38:39,020+0100 Caesium-1-1 WARN ServiceRunner [c.a.c.d.ldap.cache.EventTokenChangedCacheRefresher] Incremental synchronisation is not available. Falling back to full synchronisation
com.atlassian.crowd.event.IncrementalSynchronisationNotAvailableException
at com.atlassian.crowd.integration.rest.service.RestCrowdClient.getCurrentEventToken(RestCrowdClient.java:1002)
at com.atlassian.crowd.directory.RemoteCrowdDirectory.getCurrentEventToken(RemoteCrowdDirectory.java:631)
at com.atlassian.crowd.directory.ldap.cache.EventTokenChangedCacheRefresher.synchroniseAll(EventTokenChangedCacheRefresher.java:47)
at com.atlassian.crowd.directory.DbCachingRemoteDirectory.synchroniseCache(DbCachingRemoteDirectory.java:978)
at com.atlassian.crowd.manager.directory.DirectorySynchroniserImpl.synchronise(DirectorySynchroniserImpl.java:67)
at com.atlassian.jira.crowd.embedded.JiraDirectorySynchroniser.synchronizeDirectory(JiraDirectorySynchroniser.java:77)
at com.atlassian.jira.crowd.embedded.JiraDirectorySynchroniser.runJob(JiraDirectorySynchroniser.java:52)
at com.atlassian.scheduler.core.JobLauncher.runJob(JobLauncher.java:134)
at com.atlassian.scheduler.core.JobLauncher.launchAndBuildResponse(JobLauncher.java:106)
at com.atlassian.scheduler.core.JobLauncher.launch(JobLauncher.java:90)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.launchJob(CaesiumSchedulerService.java:435)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJob(CaesiumSchedulerService.java:430)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJobWithRecoveryGuard(CaesiumSchedulerService.java:454)
at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeQueuedJob(CaesiumSchedulerService.java:382)
at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeJob(SchedulerQueueWorker.java:66)
at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeNextJob(SchedulerQueueWorker.java:60)
at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.run(SchedulerQueueWorker.java:35)
at java.lang.Thread.run(Thread.java:748)
```

Thanks,


Answers:
author: Craig Castle-Mead
body: Hi [@Nicol?s Guzm?n](/t5/user/viewprofilepage/user-id/3431495)

I'd start by checking the Crowd Directories that are mapped to the Crowd Application Jira is configured to talk to to see if any of the directories are Delegated Authentication or don't have caching enabled

"Incremental synchronisation from a remote Crowd directory is only supported when all the remote directories are either local or fully synchronized, which does not currently include Delegated Authentication directories"

CCM


Tags: jira