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https://issues.apache.org/jira/browse/SLING-12160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17787137#comment-17787137
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Konrad Windszus commented on SLING-12160:
-----------------------------------------
I think this may happen when the {{MappingEntries}} are modified while
iterating through
https://github.com/apache/sling-org-apache-sling-resourceresolver/blob/a314ef3ce2e826bfde26493738ed94316c18bfbf/src/main/java/org/apache/sling/resourceresolver/impl/mapping/ResourceMapperImpl.java#L246
> ConcurrentModificationException in ResourceMapperImpl.readAliases()
> -------------------------------------------------------------------
>
> Key: SLING-12160
> URL: https://issues.apache.org/jira/browse/SLING-12160
> Project: Sling
> Issue Type: Bug
> Components: ResourceResolver
> Affects Versions: Resource Resolver 1.7.10
> Reporter: Konrad Windszus
> Priority: Major
>
> I have seen the following exception with Resource Resolver 1.7.10 triggered
> by calling {{ResourceResolver.map(...)}}
> {code}
> 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)
> {code}
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