KAFKA-10340: Improve trace logging under connector based topic creation (#9149)

Reviewers: Konstantine Karantasis <k.karantasis@gmail.com>

connect/runtime/src/main/java/org/apache/kafka/connect/runtime/WorkerSourceTask.java

@@ -344,7 +344,7 @@ class WorkerSourceTask extends WorkerTask {
                 continue;
             }
 
-            log.trace("{} Appending record with key {}, value {}", this, record.key(), record.value());
+            log.trace("{} Appending record to the topic {} with key {}, value {}", this, record.topic(), record.key(), record.value());
             // We need this queued first since the callback could happen immediately (even synchronously in some cases).
             // Because of this we need to be careful about handling retries -- we always save the previously attempted
             // record as part of toSend and need to use a flag to track whether we should actually add it to the outstanding
@@ -409,6 +409,9 @@ class WorkerSourceTask extends WorkerTask {
     // RegexRouter) topic creation can not be batched for multiple topics
     private void maybeCreateTopic(String topic) {
         if (!topicCreation.isTopicCreationRequired(topic)) {
+            log.trace("Topic creation by the connector is disabled or the topic {} was previously created." +
+                "If auto.create.topics.enable is enabled on the broker, " +
+                "the topic will be created with default settings", topic);
             return;
         }
         log.info("The task will send records to topic '{}' for the first time. Checking "
@@ -430,7 +433,7 @@ class WorkerSourceTask extends WorkerTask {
             log.info("Created topic '{}' using creation group {}", newTopic, topicGroup);
         } else {
             log.warn("Request to create new topic '{}' failed", topic);
-            throw new ConnectException("Task failed to create new topic " + topic + ". Ensure "
+            throw new ConnectException("Task failed to create new topic " + newTopic + ". Ensure "
                     + "that the task is authorized to create topics or that the topic exists and "
                     + "restart the task");
         }