artemlivshits commented on code in PR #20039:
URL: https://github.com/apache/kafka/pull/20039#discussion_r2178558356
##########
clients/src/main/java/org/apache/kafka/clients/producer/internals/TransactionManager.java:
##########
@@ -1500,8 +1500,20 @@ public void handleResponse(AbstractResponse response) {
ProducerIdAndEpoch producerIdAndEpoch = new
ProducerIdAndEpoch(initProducerIdResponse.data().producerId(),
initProducerIdResponse.data().producerEpoch());
setProducerIdAndEpoch(producerIdAndEpoch);
- // TO_DO Add code to handle transition to prepared_txn when
keepPrepared = true
- transitionTo(State.READY);
+ // If this is a transaction with keepPreparedTxn=true,
transition directly
+ // to PREPARED_TRANSACTION state IFF there is an ongoing
transaction.
+ if (builder.data.keepPreparedTxn() &&
+ initProducerIdResponse.data().ongoingTxnProducerId() !=
RecordBatch.NO_PRODUCER_ID
+ ) {
+ transitionTo(State.PREPARED_TRANSACTION);
+ // Update the preparedTxnState with the ongoing pid and
epoch from the response.
+ // This will be used to complete the transaction later.
+ String serializedState =
initProducerIdResponse.data().ongoingTxnProducerId() +
+ ":" +
initProducerIdResponse.data().ongoingTxnProducerEpoch();
+ TransactionManager.this.preparedTxnState = new
PreparedTxnState(serializedState);
Review Comment:
Why do we need to serialize (especially custom one-off code) just to get the
id / epoch pair again in the state?
##########
clients/src/main/java/org/apache/kafka/clients/producer/internals/TransactionManager.java:
##########
@@ -1500,8 +1500,21 @@ public void handleResponse(AbstractResponse response) {
ProducerIdAndEpoch producerIdAndEpoch = new
ProducerIdAndEpoch(initProducerIdResponse.data().producerId(),
initProducerIdResponse.data().producerEpoch());
setProducerIdAndEpoch(producerIdAndEpoch);
- // TO_DO Add code to handle transition to prepared_txn when
keepPrepared = true
- transitionTo(State.READY);
+ // If this is a 2PC-enabled transaction with
keepPreparedTxn=true, transition directly
+ // to PREPARED_TRANSACTION state IFF there is an ongoing
transaction.
+ if (enable2PC &&
Review Comment:
That's what KIP says:
https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=255071659#KIP939:SupportParticipationin2PC-RPCChanges
Could you also check other places in the code that handle `keepPreparedTxn`
to make sure we don't accidentally disable if if enable2PC is false?
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