[SLING-12160] ConcurrentModificationException in ResourceMapperImpl.readAliases()

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Resource Resolver 1.7.10
• Fix Version/s: Resource Resolver 1.11.6
• Component/s: ResourceResolver
• Assignee: Konrad Windszus
• Reporter: Konrad Windszus
• Created: 17/Nov/23 11:09
• Updated: 23/Jan/24 14:19
• Resolved: 27/Nov/23 08:01

Description

I have seen the following exception with Resource Resolver 1.7.10 triggered by calling ResourceResolver.map(...)

java.util.ConcurrentModificationException
	at java.base/java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:719)
	at java.base/java.util.LinkedHashMap$LinkedEntryIterator.next(LinkedHashMap.java:751)
	at java.base/java.util.LinkedHashMap$LinkedEntryIterator.next(LinkedHashMap.java:749)
	at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133)
	at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
	at org.apache.sling.resourceresolver.impl.mapping.ResourceMapperImpl.readAliases(ResourceMapperImpl.java:249)
	at org.apache.sling.resourceresolver.impl.mapping.ResourceMapperImpl.loadAliasesIfApplicable(ResourceMapperImpl.java:209)
	at org.apache.sling.resourceresolver.impl.mapping.ResourceMapperImpl.getAllMappings(ResourceMapperImpl.java:147)
	at org.apache.sling.resourceresolver.impl.mapping.ResourceMapperImpl.getMapping(ResourceMapperImpl.java:73)
	at org.apache.sling.resourceresolver.impl.ResourceResolverImpl.map(ResourceResolverImpl.java:444)
	at org.apache.sling.resourceresolver.impl.ResourceResolverImpl.map(ResourceResolverImpl.java:431)

Issue Links

• relates to: SLING-2521 Improve performance of sling:alias lookups and/or provide the ability to disable this feature
• links to: GitHub Pull Request #107