Hello
I experienced a fatal Oak error on my Sling version 12 instance
(oak-core 1.42.0):
14.01.2026 09:55:29.142 *ERROR* [Apache Sling Repository Startup Thread
#1] org.apache.jackrabbit.oak.segment.SegmentNotFoundExceptionListener
Segment not found: 28c937e7-4125-4afc-a2c4-c12a7401edc1. SegmentId age=52ms
org.apache.jackrabbit.oak.segment.SegmentNotFoundException: Segment
28c937e7-4125-4afc-a2c4-c12a7401edc1 not found
at
org.apache.jackrabbit.oak.segment.file.AbstractFileStore.readSegmentUncached(AbstractFileStore.java:295)
[org.apache.jackrabbit.oak-segment-tar:1.42.0]
...
This happened after months of uptime...
I fixed this by removing the nodes concerned from the segmentstore with
oak-run 1.42.0, according to this document:
https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/org-apache-jackrabbit-oak-segment-segmentnotfoundexception-in-my/m-p/665758
Now, the instance still does not come up, now with an oak security
provider error:
14.01.2026 15:12:17.857 *INFO* [FelixStartLevel]
org.apache.jackrabbit.oak.security.internal.SecurityProviderRegistration
Trying to register a SecurityProvider...
14.01.2026 15:12:17.857 *INFO* [FelixStartLevel]
org.apache.jackrabbit.oak.security.internal.SecurityProviderRegistration
Aborting: preconditions are not satisfied: Preconditions(preconditions =
[org.apache.jackrabbit.oak.security.authentication.token.TokenConfigurationImpl,
org.apache.jackrabbit.oak.spi.security.user.action.DefaultAuthorizableActionProvider,
org.apache.jackrabbit.oak.security.user.UserAuthenticationFactoryImpl,
org.apache.jackrabbit.oak.security.authorization.AuthorizationConfigurationImpl,
org.apache.jackrabbit.oak.spi.security.authorization.principalbased.impl.PrincipalBasedAuthorizationConfiguration,
org.apache.jackrabbit.oak.security.principal.PrincipalConfigurationImpl,
org.apache.jackrabbit.oak.security.authorization.restriction.RestrictionProviderImpl],
candidates =
[org.apache.jackrabbit.oak.security.authentication.token.TokenConfigurationImpl,
org.apache.jackrabbit.oak.security.user.UserAuthenticationFactoryImpl,
org.apache.jackrabbit.oak.security.principal.PrincipalConfigurationImpl,
org.apache.jackrabbit.oak.security.user.RandomAuthorizableNodeName,
org.apache.jackrabbit.oak.security.authorization.restriction.RestrictionProviderImpl])
... repeating 3 times, then ...
14.01.2026 15:12:18.020 *INFO* [FelixStartLevel]
org.apache.jackrabbit.oak.segment.file.FileStore Creating file store
FileStoreBuilder{version=1.42.0,
directory=/opt/sling/launcher/repository/segmentstore, blobStore=null,
binariesInlineThreshold=16512, maxFileSize=256, segmentCacheSize=256,
stringCacheSize=256, templateCacheSize=64,
stringDeduplicationCacheSize=15000, templateDeduplicationCacheSize=3000,
nodeDeduplicationCacheSize=1048576, memoryMapping=true,
offHeapAccess=false, gcOptions=SegmentGCOptions{paused=false,
estimationDisabled=false, gcSizeDeltaEstimation=1073741824,
retryCount=5, forceTimeout=60, retainedGenerations=2, gcType=FULL,
compactorType=CHECKPOINT_COMPACTOR}}
[ERROR] Error while running launcher: null
What is the problem here and how can it be resolved?
Thanks for any pointer!
Best,
Juerg
