d8tltanc commented on a change in pull request #9485:
URL: https://github.com/apache/kafka/pull/9485#discussion_r543174139
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File path: core/src/main/scala/kafka/security/authorizer/AclAuthorizer.scala
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@@ -130,6 +130,10 @@ class AclAuthorizer extends Authorizer with Logging {
@volatile
private var aclCache = new
scala.collection.immutable.TreeMap[ResourcePattern, VersionedAcls]()(new
ResourceOrdering)
+
+ private val resourceCache = new
scala.collection.mutable.HashMap[ResourceIndex,
+ scala.collection.mutable.HashSet[String]]()
Review comment:
I tested a bit, using 1 bg thread adding and removing elements to a
mutable.HashSet while the main thread constantly iterating the HashSet using
"foreach". The "foreach" call doesn't throw any exception.
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