[OAK-9117] ConcurrentModificationException in PermissionEntryProviderImpl.loadEntries

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Cannot Reproduce
• Affects Version/s: 1.8.7
• Component/s: security
• Assignee: Unassigned
• Reporter: Andrew Khoury
• Created: 16/Jun/20 21:30
• Updated: 02/Jul/20 16:44
• Resolved: 02/Jul/20 16:44

Description

It seems that ConcurrentModificationException can occur in PermissionEntryProviderImpl.loadEntries [1].

The issue was reported via Adobe product forums:
https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/concurrency-modification-exception/qaq-p/366611/comment-id/76072#M76072

Additional report of the same issue can be found here:

https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/concurrentmodificationexception/qaq-p/312815#M65848

[1]

Caused by: java.util.ConcurrentModificationException: null
        at java.util.HashMap$HashIterator.nextNode(Unknown Source)
        at java.util.HashMap$KeyIterator.next(Unknown Source)
        at org.apache.jackrabbit.oak.security.authorization.permission.PermissionEntryProviderImpl.loadEntries(PermissionEntryProviderImpl.java:163) [org.apache.jackrabbit.oak-core:1.8.7]
        at org.apache.jackrabbit.oak.security.authorization.permission.PermissionEntryProviderImpl.getEntries(PermissionEntryProviderImpl.java:142) [org.apache.jackrabbit.oak-core:1.8.7]
        at org.apache.jackrabbit.oak.security.authorization.permission.CompiledPermissionImpl$TreePermissionImpl.getGroupEntries(CompiledPermissionImpl.java:579) [org.apache.jackrabbit.oak-core:1.8.7]
        at org.apache.jackrabbit.oak.security.authorization.permission.CompiledPermissionImpl$TreePermissionImpl.access$1400(CompiledPermissionImpl.java:459) [org.apache.jackrabbit.oak-core:1.8.7]
        at org.apache.jackrabbit.oak.security.authorization.permission.CompiledPermissionImpl$LazyIterator.getNext(CompiledPermissionImpl.java:624) [org.apache.jackrabbit.oak-core:1.8.7]
        at org.apache.jackrabbit.oak.security.authorization.permission.CompiledPermissionImpl$LazyIterator.getNext(CompiledPermissionImpl.java:589) [org.apache.jackrabbit.oak-core:1.8.7]
        at org.apache.jackrabbit.commons.iterator.AbstractLazyIterator.hasNext(AbstractLazyIterator.java:39) [org.apache.jackrabbit.jackrabbit-jcr-commons:2.16.3]
        at com.google.common.collect.Iterators$5.hasNext(Iterators.java:542)
        at org.apache.jackrabbit.oak.security.authorization.permission.CompiledPermissionImpl$TreePermissionImpl.canRead(CompiledPermissionImpl.java:531) [org.apache.jackrabbit.oak-core:1.8.7]
        at org.apache.jackrabbit.oak.core.SecureNodeBuilder$ReadablePropertyPredicate.apply(SecureNodeBuilder.java:384) [org.apache.jackrabbit.oak-core:1.8.7]
        at org.apache.jackrabbit.oak.core.SecureNodeBuilder.getProperty(SecureNodeBuilder.java:180) [org.apache.jackrabbit.oak-core:1.8.7]
        at org.apache.jackrabbit.oak.plugins.tree.impl.AbstractTree.getProperty(AbstractTree.java:251) [org.apache.jackrabbit.oak-core:1.8.7]
        at org.apache.jackrabbit.oak.core.MutableTree.getProperty(MutableTree.java:128) [org.apache.jackrabbit.oak-core:1.8.7]
        at org.apache.jackrabbit.oak.plugins.tree.TreeUtil.getStringInternal(TreeUtil.java:116) [org.apache.jackrabbit.oak-security-spi:1.8.7]
        at org.apache.jackrabbit.oak.plugins.tree.TreeUtil.getPrimaryTypeName(TreeUtil.java:88) [org.apache.jackrabbit.oak-security-spi:1.8.7]
        at org.apache.jackrabbit.oak.spi.security.user.util.UserUtil.isType(UserUtil.java:63) [org.apache.jackrabbit.oak-security-spi:1.8.7]
        at org.apache.jackrabbit.oak.security.user.AuthorizableBaseProvider.getByPath(AuthorizableBaseProvider.java:72) [org.apache.jackrabbit.oak-core:1.8.7]