jolshan commented on code in PR #13391: URL: https://github.com/apache/kafka/pull/13391#discussion_r1160819448
########## core/src/main/scala/kafka/server/AddPartitionsToTxnManager.scala: ########## @@ -0,0 +1,170 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package kafka.server + +import kafka.common.{InterBrokerSendThread, RequestAndCompletionHandler} +import org.apache.kafka.clients.{ClientResponse, NetworkClient, RequestCompletionHandler} +import org.apache.kafka.common.{InvalidRecordException, Node, TopicPartition} +import org.apache.kafka.common.message.AddPartitionsToTxnRequestData.{AddPartitionsToTxnTransaction, AddPartitionsToTxnTransactionCollection} +import org.apache.kafka.common.protocol.Errors +import org.apache.kafka.common.requests.{AddPartitionsToTxnRequest, AddPartitionsToTxnResponse} +import org.apache.kafka.common.utils.Time + +import scala.collection.mutable + +object AddPartitionsToTxnManager { + type AppendCallback = Map[TopicPartition, Errors] => Unit +} + + +class TransactionDataAndCallbacks(val transactionData: AddPartitionsToTxnTransactionCollection, + val callbacks: mutable.Map[String, AddPartitionsToTxnManager.AppendCallback]) + + +class AddPartitionsToTxnManager(config: KafkaConfig, client: NetworkClient, time: Time) + extends InterBrokerSendThread("AddPartitionsToTxnSenderThread-" + config.brokerId, client, config.requestTimeoutMs, time) { + + private val inflightNodes = mutable.HashSet[Node]() + private val nodesToTransactions = mutable.Map[Node, TransactionDataAndCallbacks]() + + def addTxnData(node: Node, transactionData: AddPartitionsToTxnTransaction, callback: AddPartitionsToTxnManager.AppendCallback): Unit = { + nodesToTransactions.synchronized { + // Check if we have already (either node or individual transaction). Add the Node if it isn't there. + val currentNodeAndTransactionData = nodesToTransactions.getOrElseUpdate(node, + new TransactionDataAndCallbacks( + new AddPartitionsToTxnTransactionCollection(1), + mutable.Map[String, AddPartitionsToTxnManager.AppendCallback]())) + + val currentTransactionData = currentNodeAndTransactionData.transactionData.find(transactionData.transactionalId) + + // Check if we already have txn ID -- this should only happen in epoch bump case. If so, we should return error for old entry and remove from queue. + if (currentTransactionData != null) { + if (currentTransactionData.producerEpoch() < transactionData.producerEpoch()) { + val topicPartitionsToError = mutable.Map[TopicPartition, Errors]() + currentTransactionData.topics().forEach { topic => + topic.partitions().forEach { partition => + topicPartitionsToError.put(new TopicPartition(topic.name(), partition), Errors.INVALID_PRODUCER_EPOCH) + } + } + val oldCallback = currentNodeAndTransactionData.callbacks(transactionData.transactionalId()) + currentNodeAndTransactionData.transactionData.remove(transactionData) + oldCallback(topicPartitionsToError.toMap) + } else { + // We should never see a request on the same epoch since we haven't finished handling the one in queue + throw new InvalidRecordException("Received a second request from the same connection without finishing the first.") + } + } + currentNodeAndTransactionData.transactionData.add(transactionData) + currentNodeAndTransactionData.callbacks.put(transactionData.transactionalId(), callback) + wakeup() + } + } + + private class AddPartitionsToTxnHandler(node: Node, transactionDataAndCallbacks: TransactionDataAndCallbacks) extends RequestCompletionHandler { + override def onComplete(response: ClientResponse): Unit = { + inflightNodes.remove(node) + if (response.authenticationException() != null) { + error(s"AddPartitionsToTxnRequest failed for broker ${config.brokerId} with an " + + "authentication exception.", response.authenticationException) + transactionDataAndCallbacks.callbacks.foreach { case (txnId, callback) => + callback(buildErrorMap(txnId, transactionDataAndCallbacks.transactionData, Errors.forException(response.authenticationException()).code())) + } + } else if (response.versionMismatch != null) { + // We may see unsupported version exception if we try to send a verify only request to a broker that can't handle it. + // In this case, skip verification. + error(s"AddPartitionsToTxnRequest failed for broker ${config.brokerId} with invalid version exception. This suggests verification is not supported." + + s"Continuing handling the produce request.") + transactionDataAndCallbacks.callbacks.values.foreach(_(Map.empty)) + } else { + val addPartitionsToTxnResponseData = response.responseBody.asInstanceOf[AddPartitionsToTxnResponse].data + if (addPartitionsToTxnResponseData.errorCode != 0) { + error(s"AddPartitionsToTxnRequest for broker ${config.brokerId} returned with error ${Errors.forCode(addPartitionsToTxnResponseData.errorCode)}.") + // TODO: send error back correctly -- we need to verify all possible errors can be handled by the client. + // errors -- versionmismatch --> handled above + // -- clusterauth --> should handle differently + transactionDataAndCallbacks.callbacks.foreach { case (txnId, callback) => + callback(buildErrorMap(txnId, transactionDataAndCallbacks.transactionData, addPartitionsToTxnResponseData.errorCode())) + } + } else { + addPartitionsToTxnResponseData.resultsByTransaction().forEach { transactionResult => Review Comment: Let's do the check before append in a followup -- here is the JIRA -- https://issues.apache.org/jira/browse/KAFKA-14561 -- This is an automated message from the Apache Git Service. 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