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https://issues.apache.org/jira/browse/KAFKA-7185?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rajini Sivaram resolved KAFKA-7185.
-----------------------------------
Resolution: Fixed
Reviewer: Ismael Juma
Fix Version/s: 2.0.0
> getMatchingAcls throws StringIndexOutOfBoundsException for empty resource name
> ------------------------------------------------------------------------------
>
> Key: KAFKA-7185
> URL: https://issues.apache.org/jira/browse/KAFKA-7185
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 2.0.0
> Reporter: Dhruvil Shah
> Assignee: Dhruvil Shah
> Priority: Blocker
> Fix For: 2.0.0
>
>
> KIP-290 introduced a way to match ACLs based on prefix. Certain resource
> names like that for group id can be empty strings. When an empty string is
> passed into `getMatchingAcls`, it would throw a
> `StringIndexOutOfBoundsException` because of the following logic:
> {noformat}
> val prefixed = aclCache.range(
> Resource(resourceType, resourceName, PatternType.PREFIXED),
> Resource(resourceType, resourceName.substring(0, Math.min(1,
> resourceName.length)), PatternType.PREFIXED)
> )
> .filterKeys(resource => resourceName.startsWith(resource.name))
> .flatMap { case (resource, versionedAcls) => versionedAcls.acls }
> .toSet{noformat}
> This is a regression introduced in 2.0.
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