ijuma commented on code in PR #13267: URL: https://github.com/apache/kafka/pull/13267#discussion_r1257288831
########## core/src/main/scala/kafka/coordinator/transaction/ProducerIdManager.scala: ########## @@ -123,73 +131,103 @@ class ZkProducerIdManager(brokerId: Int, } } - def generateProducerId(): Long = { + def generateProducerId(): Try[Long] = { this synchronized { // grab a new block of producerIds if this block has been exhausted if (nextProducerId > currentProducerIdBlock.lastProducerId) { - allocateNewProducerIdBlock() + try { + allocateNewProducerIdBlock() + } catch { + case t: Throwable => + return Failure(t) + } nextProducerId = currentProducerIdBlock.firstProducerId } nextProducerId += 1 - nextProducerId - 1 + Success(nextProducerId - 1) + } + } + + override def hasValidBlock: Boolean = { + this synchronized { + !currentProducerIdBlock.equals(ProducerIdsBlock.EMPTY) } } } +/** + * RPCProducerIdManager allocates producer id blocks asynchronously and will immediately fail requests + * for producers to retry if it does not have an available producer id and is waiting on a new block. + */ class RPCProducerIdManager(brokerId: Int, + time: Time, brokerEpochSupplier: () => Long, - controllerChannel: BrokerToControllerChannelManager, - maxWaitMs: Int) extends ProducerIdManager with Logging { + controllerChannel: BrokerToControllerChannelManager) extends ProducerIdManager with Logging { this.logIdent = "[RPC ProducerId Manager " + brokerId + "]: " - private val nextProducerIdBlock = new ArrayBlockingQueue[Try[ProducerIdsBlock]](1) + // Visible for testing + private[transaction] var nextProducerIdBlock = new AtomicReference[ProducerIdsBlock](null) + private val currentProducerIdBlock: AtomicReference[ProducerIdsBlock] = new AtomicReference(ProducerIdsBlock.EMPTY) private val requestInFlight = new AtomicBoolean(false) - private var currentProducerIdBlock: ProducerIdsBlock = ProducerIdsBlock.EMPTY - private var nextProducerId: Long = -1L + private val backoffDeadlineMs = new AtomicLong(NoRetry) - override def generateProducerId(): Long = { - this synchronized { - if (nextProducerId == -1L) { - // Send an initial request to get the first block - maybeRequestNextBlock() - nextProducerId = 0L - } else { - nextProducerId += 1 - - // Check if we need to fetch the next block - if (nextProducerId >= (currentProducerIdBlock.firstProducerId + currentProducerIdBlock.size * ProducerIdManager.PidPrefetchThreshold)) { - maybeRequestNextBlock() - } - } + override def hasValidBlock: Boolean = { + nextProducerIdBlock.get != null + } - // If we've exhausted the current block, grab the next block (waiting if necessary) - if (nextProducerId > currentProducerIdBlock.lastProducerId) { - val block = nextProducerIdBlock.poll(maxWaitMs, TimeUnit.MILLISECONDS) - if (block == null) { - // Return COORDINATOR_LOAD_IN_PROGRESS rather than REQUEST_TIMED_OUT since older clients treat the error as fatal - // when it should be retriable like COORDINATOR_LOAD_IN_PROGRESS. - throw Errors.COORDINATOR_LOAD_IN_PROGRESS.exception("Timed out waiting for next producer ID block") - } else { - block match { - case Success(nextBlock) => - currentProducerIdBlock = nextBlock - nextProducerId = currentProducerIdBlock.firstProducerId - case Failure(t) => throw t + override def generateProducerId(): Try[Long] = { + var result: Try[Long] = null + var iteration = 0 + while (result == null) { + currentProducerIdBlock.get.claimNextId().asScala match { + case None => + // Check the next block if current block is full + val block = nextProducerIdBlock.getAndSet(null) + if (block == null) { + // Return COORDINATOR_LOAD_IN_PROGRESS rather than REQUEST_TIMED_OUT since older clients treat the error as fatal + // when it should be retriable like COORDINATOR_LOAD_IN_PROGRESS. + maybeRequestNextBlock() + result = Failure(Errors.COORDINATOR_LOAD_IN_PROGRESS.exception("Producer ID block is full. Waiting for next block")) Review Comment: I thought we would only do this for older clients and introduce a more descriptive error code for newer clients. What happened to that? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org