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Apurva Mehta edited comment on KAFKA-5351 at 5/31/17 7:03 AM: -------------------------------------------------------------- I saw the following in the logs for two of the brokers. At 06:12:05 the first broker returns COORDINATOR_NOT_AVAILABLE, at which point the producer sends a FindCoordinator request and gets routed back to the same broker (knode09) below. The producer then keeps retrying the EndTxn request, and keeps getting CONCURRENT_TRANSACTIONS error code back. At 06:12:17, the producer gets a NOT_COORDINATOR erro. It then sends another 'FindCoordinator' request, and gets routed to knode03, at which point, it keeps getting CONCURRENT_TRANSACTIONS until the process is terminated. {noformat} root@f82eb723774d:/opt/kafka-dev/results/latest/TransactionsTest/test_transactions/failure_mode=clean_bounce.bounce_target=brokers/1/KafkaService-0-140388221024592/knode09# find . -name 'server.log' -exec grep -Hni 'my-second-transactional-id' {} \; ./info/server.log:956:[2017-05-31 06:12:05,724] INFO TransactionalId my-second-transactional-id prepare transition from Ongoing to TxnTransitMetadata(producerId=1001, producerEpoch=0, txnTimeoutMs=60000, txnState=PrepareCommit, topicPartitions=Set(output-topic-2, __consumer_offsets-47, output-topic-0, output-topic-1), txnStartTimestamp=1496211125265, txnLastUpdateTimestamp=1496211125723) (kafka.coordinator.transaction.TransactionMetadata) ./info/server.log:963:[2017-05-31 06:12:05,736] INFO [Transaction Log Manager 3]: Appending transaction message TxnTransitMetadata(producerId=1001, producerEpoch=0, txnTimeoutMs=60000, txnState=PrepareCommit, topicPartitions=Set(output-topic-2, __consumer_offsets-47, output-topic-0, output-topic-1), txnStartTimestamp=1496211125265, txnLastUpdateTimestamp=1496211125723) for my-second-transactional-id failed due to org.apache.kafka.common.errors.NotEnoughReplicasException,returning COORDINATOR_NOT_AVAILABLE to the client (kafka.coordinator.transaction.TransactionStateManager) ./info/server.log:964:[2017-05-31 06:12:05,737] INFO [Transaction Coordinator 3]: Updating my-second-transactional-id's transaction state to TxnTransitMetadata(producerId=1001, producerEpoch=0, txnTimeoutMs=60000, txnState=PrepareCommit,topicPartitions=Set(output-topic-2, __consumer_offsets-47, output-topic-0, output-topic-1), txnStartTimestamp=1496211125265, txnLastUpdateTimestamp=1496211125723) with coordinator epoch 1 for my-second-transactional-id failed since the transaction message cannot be appended to the log. Returning error code COORDINATOR_NOT_AVAILABLE to the client (kafka.coordinator.transaction.TransactionCoordinator) root@f82eb723774d:/opt/kafka-dev/results/latest/TransactionsTest/test_transactions/failure_mode=clean_bounce.bounce_target=brokers/1/KafkaService-0-140388221024592/knode09# cd .. root@f82eb723774d:/opt/kafka-dev/results/latest/TransactionsTest/test_transactions/failure_mode=clean_bounce.bounce_target=brokers/1/KafkaService-0-140388221024592# cd knode03/ root@f82eb723774d:/opt/kafka-dev/results/latest/TransactionsTest/test_transactions/failure_mode=clean_bounce.bounce_target=brokers/1/KafkaService-0-140388221024592/knode03# find . -name 'server.log' -exec grep -Hni 'my-second-transactional-id' {} \; ./info/server.log:1737:[2017-05-31 06:12:17,906] INFO TransactionalId my-second-transactional-id prepare transition from Ongoing to TxnTransitMetadata(producerId=1001, producerEpoch=0, txnTimeoutMs=60000, txnState=PrepareCommit, topicPartitions=Set(output-topic-2, __consumer_offsets-47, output-topic-0, output-topic-1), txnStartTimestamp=1496211125265, txnLastUpdateTimestamp=1496211137906) (kafka.coordinator.transaction.TransactionMetadata) ./info/server.log:1741:[2017-05-31 06:12:17,926] INFO [Transaction Log Manager 1]: Appending transaction message TxnTransitMetadata(producerId=1001, producerEpoch=0, txnTimeoutMs=60000, txnState=PrepareCommit, topicPartitions=Set(output-topic-2, __consumer_offsets-47, output-topic-0, output-topic-1), txnStartTimestamp=1496211125265, txnLastUpdateTimestamp=1496211137906) for my-second-transactional-id failed due to org.apache.kafka.common.errors.NotEnoughReplicasException, returning COORDINATOR_NOT_AVAILABLE to the client (kafka.coordinator.transaction.TransactionStateManager) ./info/server.log:1742:[2017-05-31 06:12:17,933] INFO [Transaction Coordinator 1]: Updating my-second-transactional-id's transaction state to TxnTransitMetadata(producerId=1001, producerEpoch=0, txnTimeoutMs=60000, txnState=PrepareCommit, topicPartitions=Set(output-topic-2, __consumer_offsets-47, output-topic-0, output-topic-1), txnStartTimestamp=1496211125265, txnLastUpdateTimestamp=1496211137906) with coordinator epoch 2 for my-second-transactional-id failed since the transaction message cannot be appended to the log. Returning error code COORDINATOR_NOT_AVAILABLE to the client (kafka.coordinator.transaction.TransactionCoordinator) {noformat} Relevant portions of the client log: {noformat} [2017-05-31 06:12:05,595] DEBUG TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,595] TRACE TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) to node 2 (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,597] TRACE Got transactional response for request:(transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:05,597] DEBUG TransactionalId my-second-transactional-id -- Received EndTxn response with error NOT_COORDINATOR (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:05,597] DEBUG TransactionalId: my-second-transactional-id -- Sending transactional request (type=FindCoordinatorRequest, coordinatorKey=my-second-transactional-id, coordinatorType=TRANSACTION) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,597] TRACE TransactionalId: my-second-transactional-id -- Sending transactional request (type=FindCoordinatorRequest, coordinatorKey=my-second-transactional-id, coordinatorType=TRANSACTION) to node 3 (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,598] TRACE Got transactional response for request:(type=FindCoordinatorRequest, coordinatorKey=my-second-transactional-id, coordinatorType=TRANSACTION) (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:05,598] DEBUG TransactionalId my-second-transactional-id -- Received FindCoordinator response with error NONE (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:05,598] DEBUG TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,598] TRACE TransactionalId: my-second-transactional-id -- Waiting 100ms before resending a transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,699] TRACE TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) to node 3 (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,738] TRACE Got transactional response for request:(transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:05,738] DEBUG TransactionalId my-second-transactional-id -- Received EndTxn response with error COORDINATOR_NOT_AVAILABLE (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:05,738] DEBUG TransactionalId: my-second-transactional-id -- Sending transactional request (type=FindCoordinatorRequest, coordinatorKey=my-second-transactional-id, coordinatorType=TRANSACTION) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,738] TRACE TransactionalId: my-second-transactional-id -- Sending transactional request (type=FindCoordinatorRequest, coordinatorKey=my-second-transactional-id, coordinatorType=TRANSACTION) to node 2 (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,740] TRACE Got transactional response for request:(type=FindCoordinatorRequest, coordinatorKey=my-second-transactional-id, coordinatorType=TRANSACTION) (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:05,740] DEBUG TransactionalId my-second-transactional-id -- Received FindCoordinator response with error NONE (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:05,740] DEBUG TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,740] TRACE TransactionalId: my-second-transactional-id -- Waiting 100ms before resending a transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,841] TRACE TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) to node 3 (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,842] TRACE Got transactional response for request:(transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:05,842] DEBUG TransactionalId my-second-transactional-id -- Received EndTxn response with error CONCURRENT_TRANSACTIONS (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:05,842] DEBUG TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,842] TRACE TransactionalId: my-second-transactional-id -- Waiting 100ms before resending a transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,942] TRACE TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) to node 3 (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,945] TRACE Got transactional response for request:(transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:05,945] DEBUG TransactionalId my-second-transactional-id -- Received EndTxn response with error CONCURRENT_TRANSACTIONS (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:05,945] DEBUG TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:05,945] TRACE TransactionalId: my-second-transactional-id -- Waiting 100ms before resending a transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) {noformat} and, for the second time period: {noformat} [2017-05-31 06:12:16,648] DEBUG TransactionalId my-second-transactional-id -- Received EndTxn response with error CONCURRENT_TRANSACTIONS (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:16,648] DEBUG TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:16,648] TRACE TransactionalId: my-second-transactional-id -- Waiting 100ms before resending a transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:16,749] TRACE TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) to node 3 (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:16,763] TRACE Got transactional response for request:(transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:16,763] DEBUG TransactionalId my-second-transactional-id -- Received EndTxn response with error NOT_COORDINATOR (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:16,786] DEBUG TransactionalId: my-second-transactional-id -- Sending transactional request (type=FindCoordinatorRequest, coordinatorKey=my-second-transactional-id, coordinatorType=TRANSACTION) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:16,796] TRACE TransactionalId: my-second-transactional-id -- Sending transactional request (type=FindCoordinatorRequest, coordinatorKey=my-second-transactional-id, coordinatorType=TRANSACTION) to node 3 (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:17,086] TRACE Got transactional response for request:(type=FindCoordinatorRequest, coordinatorKey=my-second-transactional-id, coordinatorType=TRANSACTION) (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:17,109] DEBUG TransactionalId my-second-transactional-id -- Received FindCoordinator response with error NONE (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:17,120] DEBUG TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:17,695] TRACE TransactionalId: my-second-transactional-id -- Waiting 100ms before resending a transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:17,795] TRACE TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) to node 1 (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:17,934] TRACE Got transactional response for request:(transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:17,934] DEBUG TransactionalId my-second-transactional-id -- Received EndTxn response with error COORDINATOR_NOT_AVAILABLE (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:17,934] DEBUG TransactionalId: my-second-transactional-id -- Sending transactional request (type=FindCoordinatorRequest, coordinatorKey=my-second-transactional-id, coordinatorType=TRANSACTION) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:17,934] TRACE TransactionalId: my-second-transactional-id -- Sending transactional request (type=FindCoordinatorRequest, coordinatorKey=my-second-transactional-id, coordinatorType=TRANSACTION) to node 1 (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:17,941] TRACE Got transactional response for request:(type=FindCoordinatorRequest, coordinatorKey=my-second-transactional-id, coordinatorType=TRANSACTION) (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:17,941] DEBUG TransactionalId my-second-transactional-id -- Received FindCoordinator response with error NONE (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:17,941] DEBUG TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:17,941] TRACE TransactionalId: my-second-transactional-id -- Waiting 100ms before resending a transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:18,041] TRACE TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) to node 1 (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:18,043] TRACE Got transactional response for request:(transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:18,043] DEBUG TransactionalId my-second-transactional-id -- Received EndTxn response with error CONCURRENT_TRANSACTIONS (org.apache.kafka.clients.producer.internals.TransactionManager) [2017-05-31 06:12:18,043] DEBUG TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:18,043] TRACE TransactionalId: my-second-transactional-id -- Waiting 100ms before resending a transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) (org.apache.kafka.clients.producer.internals.Sender) [2017-05-31 06:12:18,143] TRACE TransactionalId: my-second-transactional-id -- Sending transactional request (transactionalId=my-second-transactional-id, producerId=1001, producerEpoch=0, result=COMMIT) to node 1 (org.apache.kafka.clients.producer.internals.Sender) {noformat} was (Author: apurva): I saw the following in the logs for two of the brokers. At 06:12:05 the first broker returns COORDINATOR_NOT_AVAILABLE, at which point the producer sends a FindCoordinator request and gets routed back to the same broker (knode09) below. The producer then keeps retrying the EndTxn request, and keeps getting CONCURRENT_TRANSACTIONS error code back. At 06:12:17, the producer gets a NOT_COORDINATOR erro. It then sends another 'FindCoordinator' request, and gets routed to knode03, at which point, it keeps getting CONCURRENT_TRANSACTIONS until the process is terminated. {noformat} root@f82eb723774d:/opt/kafka-dev/results/latest/TransactionsTest/test_transactions/failure_mode=clean_bounce.bounce_target=brokers/1/KafkaService-0-140388221024592/knode09# find . -name 'server.log' -exec grep -Hni 'my-second-transactional-id' {} \; ./info/server.log:956:[2017-05-31 06:12:05,724] INFO TransactionalId my-second-transactional-id prepare transition from Ongoing to TxnTransitMetadata(producerId=1001, producerEpoch=0, txnTimeoutMs=60000, txnState=PrepareCommit, topicPartitions=Set(output-topic-2, __consumer_offsets-47, output-topic-0, output-topic-1), txnStartTimestamp=1496211125265, txnLastUpdateTimestamp=1496211125723) (kafka.coordinator.transaction.TransactionMetadata) ./info/server.log:963:[2017-05-31 06:12:05,736] INFO [Transaction Log Manager 3]: Appending transaction message TxnTransitMetadata(producerId=1001, producerEpoch=0, txnTimeoutMs=60000, txnState=PrepareCommit, topicPartitions=Set(output-topic-2, __consumer_offsets-47, output-topic-0, output-topic-1), txnStartTimestamp=1496211125265, txnLastUpdateTimestamp=1496211125723) for my-second-transactional-id failed due to org.apache.kafka.common.errors.NotEnoughReplicasException,returning COORDINATOR_NOT_AVAILABLE to the client (kafka.coordinator.transaction.TransactionStateManager) ./info/server.log:964:[2017-05-31 06:12:05,737] INFO [Transaction Coordinator 3]: Updating my-second-transactional-id's transaction state to TxnTransitMetadata(producerId=1001, producerEpoch=0, txnTimeoutMs=60000, txnState=PrepareCommit,topicPartitions=Set(output-topic-2, __consumer_offsets-47, output-topic-0, output-topic-1), txnStartTimestamp=1496211125265, txnLastUpdateTimestamp=1496211125723) with coordinator epoch 1 for my-second-transactional-id failed since the transaction message cannot be appended to the log. Returning error code COORDINATOR_NOT_AVAILABLE to the client (kafka.coordinator.transaction.TransactionCoordinator) root@f82eb723774d:/opt/kafka-dev/results/latest/TransactionsTest/test_transactions/failure_mode=clean_bounce.bounce_target=brokers/1/KafkaService-0-140388221024592/knode09# cd .. root@f82eb723774d:/opt/kafka-dev/results/latest/TransactionsTest/test_transactions/failure_mode=clean_bounce.bounce_target=brokers/1/KafkaService-0-140388221024592# cd knode03/ root@f82eb723774d:/opt/kafka-dev/results/latest/TransactionsTest/test_transactions/failure_mode=clean_bounce.bounce_target=brokers/1/KafkaService-0-140388221024592/knode03# find . -name 'server.log' -exec grep -Hni 'my-second-transactional-id' {} \; ./info/server.log:1737:[2017-05-31 06:12:17,906] INFO TransactionalId my-second-transactional-id prepare transition from Ongoing to TxnTransitMetadata(producerId=1001, producerEpoch=0, txnTimeoutMs=60000, txnState=PrepareCommit, topicPartitions=Set(output-topic-2, __consumer_offsets-47, output-topic-0, output-topic-1), txnStartTimestamp=1496211125265, txnLastUpdateTimestamp=1496211137906) (kafka.coordinator.transaction.TransactionMetadata) ./info/server.log:1741:[2017-05-31 06:12:17,926] INFO [Transaction Log Manager 1]: Appending transaction message TxnTransitMetadata(producerId=1001, producerEpoch=0, txnTimeoutMs=60000, txnState=PrepareCommit, topicPartitions=Set(output-topic-2, __consumer_offsets-47, output-topic-0, output-topic-1), txnStartTimestamp=1496211125265, txnLastUpdateTimestamp=1496211137906) for my-second-transactional-id failed due to org.apache.kafka.common.errors.NotEnoughReplicasException, returning COORDINATOR_NOT_AVAILABLE to the client (kafka.coordinator.transaction.TransactionStateManager) ./info/server.log:1742:[2017-05-31 06:12:17,933] INFO [Transaction Coordinator 1]: Updating my-second-transactional-id's transaction state to TxnTransitMetadata(producerId=1001, producerEpoch=0, txnTimeoutMs=60000, txnState=PrepareCommit, topicPartitions=Set(output-topic-2, __consumer_offsets-47, output-topic-0, output-topic-1), txnStartTimestamp=1496211125265, txnLastUpdateTimestamp=1496211137906) with coordinator epoch 2 for my-second-transactional-id failed since the transaction message cannot be appended to the log. Returning error code COORDINATOR_NOT_AVAILABLE to the client (kafka.coordinator.transaction.TransactionCoordinator) {noformat} > Broker clean bounce test puts the broker into a 'CONCURRENT_TRANSACTIONS' > state permanently > ------------------------------------------------------------------------------------------- > > Key: KAFKA-5351 > URL: https://issues.apache.org/jira/browse/KAFKA-5351 > Project: Kafka > Issue Type: Sub-task > Components: clients, core, producer > Reporter: Apurva Mehta > Assignee: Apurva Mehta > Priority: Blocker > Labels: exactly-once > Fix For: 0.11.0.0 > > > In the broker clean bounce test, sometimes the consumer just hangs on a > request to the transactional coordinator because it keeps getting a > `CONCURRENT_TRANSACTIONS` error. This continues for 30 seconds, until the > process is killed. > {noformat} > [2017-05-31 04:54:14,053] DEBUG TransactionalId my-second-transactional-id -- > Received FindCoordinator response with error NONE > (org.apache.kafka.clients.producer.internals.TransactionManager) > [2017-05-31 04:54:14,053] DEBUG TransactionalId: my-second-transactional-id > -- Sending transactional request (transactionalId=my-second-transactional-id, > producerId=2000, producerEpoch=0, result=COMMIT) > (org.apache.kafka.clients.producer.internals.Sender) > [2017-05-31 04:54:14,053] TRACE TransactionalId: my-second-transactional-id > -- Waiting 100ms before resending a transactional request > (transactionalId=my-second-transactional-id, producerId=2000, > producerEpoch=0, result=COMMIT) > (org.apache.kafka.clients.producer.internals.Sender) > [2017-05-31 04:54:14,154] TRACE TransactionalId: my-second-transactional-id > -- Sending transactional request (transactionalId=my-second-transactional-id, > producerId=2000, producerEpoch=0, result=COMMIT) to node 1 > (org.apache.kafka.clients.producer.internals.Sender) > [2017-05-31 04:54:14,191] TRACE Got transactional response for > request:(transactionalId=my-second-transactional-id, producerId=2000, > producerEpoch=0, result=COMMIT) > (org.apache.kafka.clients.producer.internals.TransactionManager) > [2017-05-31 04:54:14,191] DEBUG TransactionalId my-second-transactional-id -- > Received EndTxn response with error COORDINATOR_NOT_AVAILABLE > (org.apache.kafka.clients.producer.internals.TransactionManager) > [2017-05-31 04:54:14,192] DEBUG TransactionalId: my-second-transactional-id > -- Sending transactional request (type=FindCoordinatorRequest, > coordinatorKey=my-second-transactional-id, coordinatorType=TRANSACTION) > (org.apache.kafka.clients.producer.internals.Sender) > [2017-05-31 04:54:14,192] TRACE TransactionalId: my-second-transactional-id > -- Sending transactional request (type=FindCoordinatorRequest, > coordinatorKey=my-second-transactional-id, coordinatorType=TRANSACTION) to > node 3 (org.apache.kafka.clients.producer.internals.Sender) > [2017-05-31 04:54:14,193] TRACE Got transactional response for > request:(type=FindCoordinatorRequest, > coordinatorKey=my-second-transactional-id, coordinatorType=TRANSACTION) > (org.apache.kafka.clients.producer.internals.TransactionManager) > [2017-05-31 04:54:14,193] DEBUG TransactionalId my-second-transactional-id -- > Received FindCoordinator response with error NONE > (org.apache.kafka.clients.producer.internals.TransactionManager) > [2017-05-31 04:54:14,193] DEBUG TransactionalId: my-second-transactional-id > -- Sending transactional request (transactionalId=my-second-transactional-id, > producerId=2000, producerEpoch=0, result=COMMIT) > (org.apache.kafka.clients.producer.internals.Sender) > [2017-05-31 04:54:14,193] TRACE TransactionalId: my-second-transactional-id > -- Waiting 100ms before resending a transactional request > (transactionalId=my-second-transactional-id, producerId=2000, > producerEpoch=0, result=COMMIT) > (org.apache.kafka.clients.producer.internals.Sender) > [2017-05-31 04:54:14,294] TRACE TransactionalId: my-second-transactional-id > -- Sending transactional request (transactionalId=my-second-transactional-id, > producerId=2000, producerEpoch=0, result=COMMIT) to node 1 > (org.apache.kafka.clients.producer.internals.Sender) > [2017-05-31 04:54:14,294] TRACE Got transactional response for > request:(transactionalId=my-second-transactional-id, producerId=2000, > producerEpoch=0, result=COMMIT) > (org.apache.kafka.clients.producer.internals.TransactionManager) > [2017-05-31 04:54:14,295] DEBUG TransactionalId my-second-transactional-id -- > Received EndTxn response with error CONCURRENT_TRANSACTIONS > (org.apache.kafka.clients.producer.internals.TransactionManager) > [2017-05-31 04:54:14,295] DEBUG TransactionalId: my-second-transactional-id > -- Sending transactional request (transactionalId=my-second-transactional-id, > producerId=2000, producerEpoch=0, result=COMMIT) > (org.apache.kafka.clients.producer.internals.Sender) > [2017-05-31 04:54:14,295] TRACE TransactionalId: my-second-transactional-id > -- Waiting 100ms before resending a transactional request > (transactionalId=my-second-transactional-id, producerId=2000, > producerEpoch=0, result=COMMIT) > (org.apache.kafka.clients.producer.internals.Sender) > [2017-05-31 04:54:14,395] TRACE TransactionalId: my-second-transactional-id > -- Sending transactional request (transactionalId=my-second-transactional-id, > producerId=2000, producerEpoch=0, result=COMMIT) to node 1 > (org.apache.kafka.clients.producer.internals.Sender) > [2017-05-31 04:54:14,398] TRACE Got transactional response for > request:(transactionalId=my-second-transactional-id, producerId=2000, > producerEpoch=0, result=COMMIT) > (org.apache.kafka.clients.producer.internals.TransactionManager) > [2017-05-31 04:54:14,398] DEBUG TransactionalId my-second-transactional-id -- > Received EndTxn response with error CONCURRENT_TRANSACTIONS > (org.apache.kafka.clients.producer.internals.TransactionManager) > {noformat} -- This message was sent by Atlassian JIRA (v6.3.15#6346)