omkreddy commented on code in PR #14083:
URL: https://github.com/apache/kafka/pull/14083#discussion_r1289107179


##########
core/src/main/scala/kafka/server/DelegationTokenManager.scala:
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@@ -165,10 +112,11 @@ object DelegationTokenManager {
 
 class DelegationTokenManager(val config: KafkaConfig,
                              val tokenCache: DelegationTokenCache,
-                             val time: Time,
-                             val zkClient: KafkaZkClient) extends Logging {
+                             val time: Time) extends Logging {
   this.logIdent = s"[Token Manager on Broker ${config.brokerId}]: "
 
+  protected val lock = new Object()
+

Review Comment:
   Cab we remove unused DescribeResponseCallback type variable at line no:125



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