artemlivshits commented on code in PR #20039:
URL: https://github.com/apache/kafka/pull/20039#discussion_r2220575422


##########
clients/src/main/java/org/apache/kafka/clients/producer/internals/TransactionManager.java:
##########
@@ -1965,6 +1977,9 @@ private PendingStateTransition(
      * @return a PreparedTxnState with the current producer ID and epoch
      */
     public PreparedTxnState preparedTransactionState() {
-        return this.preparedTxnState;
+        if (this.preparedTxnState == ProducerIdAndEpoch.NONE) {

Review Comment:
   The point to use `ProducerIdAndEpoch` in `TransactionManager` is so that we 
can return it to producer and use the package private constructor to create the 
object, so that the string representation is encapsulated in the 
`PreparedTxnState`.



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