KAFKA-19499: Corrected the logger name in PersisterStateManagerHandler (#20175)

This PR corrects the name of logger in the inner class
PersisterStateManagerHandler. After this change it will be possible to
change the log level dynamically in the kafka brokers. This PR also
includes a small change in a log line in GroupCoordinatorService, making
it clearer.

Reviewers: Apoorv Mittal <apoorvmittal10@gmail.com>, Sushant Mahajan
<smahajan@confluent.io>, Lan Ding <isDing_L@163.com>, TengYao Chi
<frankvicky@apache.org>

Author: chirag-wadhwa5

group-coordinator/src/main/java/org/apache/kafka/coordinator/group/GroupCoordinatorService.java

@@ -796,7 +796,7 @@ private CompletableFuture<ShareGroupHeartbeatResponseData> handlePersisterInitia
             }
             return performShareGroupStateMetadataInitialize(groupId, topicPartitionMap, defaultResponse);
         }
-        log.error("Received error while calling initialize state for {} on persister {}.", groupId, persisterError.code());
+        log.error("Received error while calling initialize state for {} on persister, errorCode: {}.", groupId, persisterError.code());
         return uninitializeShareGroupState(persisterError, groupId, topicPartitionMap);
     }
 

server-common/src/main/java/org/apache/kafka/server/share/persister/PersisterStateManager.java

@@ -221,7 +221,7 @@ public void setGenerateCallback(Runnable generateCallback) {
     public abstract class PersisterStateManagerHandler implements RequestCompletionHandler {
         protected Node coordinatorNode;
         private final BackoffManager findCoordBackoff;
-        protected final Logger log = LoggerFactory.getLogger(getClass());
+        protected final Logger log;
         private Consumer<ClientResponse> onCompleteCallback;
         protected final SharePartitionKey partitionKey;
 
@@ -237,6 +237,11 @@ public PersisterStateManagerHandler(
             this.onCompleteCallback = response -> {
             }; // noop
             partitionKey = SharePartitionKey.getInstance(groupId, topicId, partition);
+            String canonicalName = getClass().getCanonicalName();
+            if (canonicalName == null) {
+                canonicalName = getClass().getName();
+            }
+            log = LoggerFactory.getLogger(canonicalName);
         }
 
         /**