C0urante commented on a change in pull request #11777: URL: https://github.com/apache/kafka/pull/11777#discussion_r817274558
########## File path: clients/src/main/java/org/apache/kafka/clients/admin/internals/FenceProducersHandler.java ########## @@ -0,0 +1,148 @@ +/* + * 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 org.apache.kafka.clients.admin.internals; + +import org.apache.kafka.common.Node; +import org.apache.kafka.common.errors.ClusterAuthorizationException; +import org.apache.kafka.common.errors.TransactionalIdAuthorizationException; +import org.apache.kafka.common.message.InitProducerIdRequestData; +import org.apache.kafka.common.protocol.Errors; +import org.apache.kafka.common.requests.AbstractResponse; +import org.apache.kafka.common.requests.FindCoordinatorRequest; +import org.apache.kafka.common.requests.InitProducerIdRequest; +import org.apache.kafka.common.requests.InitProducerIdResponse; +import org.apache.kafka.common.utils.LogContext; +import org.apache.kafka.common.utils.ProducerIdAndEpoch; +import org.slf4j.Logger; + +import java.util.Collection; +import java.util.Collections; +import java.util.Map; +import java.util.Set; +import java.util.stream.Collectors; + +public class FenceProducersHandler extends AdminApiHandler.Unbatched<CoordinatorKey, ProducerIdAndEpoch> { + private final Logger log; + private final AdminApiLookupStrategy<CoordinatorKey> lookupStrategy; + + public FenceProducersHandler( + LogContext logContext + ) { + this.log = logContext.logger(FenceProducersHandler.class); + this.lookupStrategy = new CoordinatorStrategy(FindCoordinatorRequest.CoordinatorType.TRANSACTION, logContext); + } + + public static AdminApiFuture.SimpleAdminApiFuture<CoordinatorKey, ProducerIdAndEpoch> newFuture( + Collection<String> transactionalIds + ) { + return AdminApiFuture.forKeys(buildKeySet(transactionalIds)); + } + + private static Set<CoordinatorKey> buildKeySet(Collection<String> transactionalIds) { + return transactionalIds.stream() + .map(CoordinatorKey::byTransactionalId) + .collect(Collectors.toSet()); + } + + @Override + public String apiName() { + return "fenceProducer"; + } + + @Override + public AdminApiLookupStrategy<CoordinatorKey> lookupStrategy() { + return lookupStrategy; + } + + @Override + InitProducerIdRequest.Builder buildSingleRequest(int brokerId, CoordinatorKey key) { + if (key.type != FindCoordinatorRequest.CoordinatorType.TRANSACTION) { + throw new IllegalArgumentException("Invalid group coordinator key " + key + + " when building `InitProducerId` request"); + } + InitProducerIdRequestData data = new InitProducerIdRequestData() + // Because we never include a producer epoch or ID in this request, we expect that some errors + // (such as PRODUCER_FENCED) will never be returned in the corresponding broker response. + // If we ever modify this logic to include an epoch or producer ID, we will need to update the + // error handling logic for this handler to accommodate these new errors. + .setProducerEpoch(ProducerIdAndEpoch.NONE.epoch) + .setProducerId(ProducerIdAndEpoch.NONE.producerId) + .setTransactionalId(key.idValue) + // Set transaction timeout to 1 since it's only being initialized to fence out older producers with the same transactional ID, + // and shouldn't be used for any actual record writes + .setTransactionTimeoutMs(1); + return new InitProducerIdRequest.Builder(data); + } + + @Override + public ApiResult<CoordinatorKey, ProducerIdAndEpoch> handleSingleResponse( + Node broker, + CoordinatorKey key, + AbstractResponse abstractResponse + ) { + InitProducerIdResponse response = (InitProducerIdResponse) abstractResponse; + + Errors error = Errors.forCode(response.data().errorCode()); + if (error != Errors.NONE) { + return handleError(key, error); + } + + Map<CoordinatorKey, ProducerIdAndEpoch> completed = Collections.singletonMap(key, new ProducerIdAndEpoch( + response.data().producerId(), + response.data().producerEpoch() + )); + + return new ApiResult<>(completed, Collections.emptyMap(), Collections.emptyList()); + } + + private ApiResult<CoordinatorKey, ProducerIdAndEpoch> handleError(CoordinatorKey transactionalIdKey, Errors error) { + switch (error) { + case CLUSTER_AUTHORIZATION_FAILED: + return ApiResult.failed(transactionalIdKey, new ClusterAuthorizationException( + "InitProducerId request for transactionalId `" + transactionalIdKey.idValue + "` " + + "failed due to cluster authorization failure")); + + case TRANSACTIONAL_ID_AUTHORIZATION_FAILED: + return ApiResult.failed(transactionalIdKey, new TransactionalIdAuthorizationException( + "InitProducerId request for transactionalId `" + transactionalIdKey.idValue + "` " + + "failed due to transactional ID authorization failure")); + + // We intentionally omit cases for PRODUCER_FENCED, TRANSACTIONAL_ID_NOT_FOUND, and INVALID_PRODUCER_EPOCH + // since those errors should never happen when our InitProducerIdRequest doesn't include a producer epoch or ID + // and should therefore fall under the "unexpected error" catch-all case below + + case COORDINATOR_LOAD_IN_PROGRESS: + // If the coordinator is in the middle of loading, then we just need to retry + log.debug("InitProducerId request for transactionalId `{}` failed because the " + + "coordinator is still in the process of loading state. Will retry", + transactionalIdKey.idValue); + return ApiResult.empty(); + + case NOT_COORDINATOR: + case COORDINATOR_NOT_AVAILABLE: + // If the coordinator is unavailable or there was a coordinator change, then we unmap + // the key so that we retry the `FindCoordinator` request + log.debug("InitProducerId request for transactionalId `{}` returned error {}. Will attempt " + + "to find the coordinator again and retry", transactionalIdKey.idValue, error); Review comment: I used the same language as the `DescribeTransactionsHandler`: https://github.com/apache/kafka/blob/84f8c90b132522639f13e36096b405b818d208c3/clients/src/main/java/org/apache/kafka/clients/admin/internals/DescribeTransactionsHandler.java#L184-L185 Looks like, excluding the newly-introduced `FenceProducersHandler` and the existing `DescribeTransactionsHandler` classes, there's five additional `*Handler` classes that use this same language: `DeleteConsumerGroupsHandler`, `DeleteConsumerGroupOffsetsHandler`, `DescribeConsumerGroupsHandler`, `ListConsumerGroupOffsetsHandler`, and `RemoveMembersFromConsumerGroupHandler`. Maybe we can keep this as-is for consistency's sake and, if there's user confusion as a result of language in the log messages around these parts, address that in a separate, dedicated PR? -- This is an automated message from the Apache Git Service. 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