來自Kafka在Flume中的EOFException

Question

我正在嘗試設置從控制檯Kafka生產者到Hadoop文件系統（HDFS）的簡單數據管道。我正在開發一款64位的Ubuntu虛擬機，並按照我所遵循的指南的建議，爲Hadoop和Kafka創建了單獨的用戶。使用控制檯消費者在卡夫卡消費生產的輸入，並且HDFS似乎正在運行。

現在我想使用Flume將輸入傳送到HDFS。我使用下面的配置文件：

tier1.sources = source1 
tier1.channels = channel1 
tier1.sinks = sink1 

tier1.sources.source1.type = org.apache.flume.source.kafka.KafkaSource 
tier1.sources.source1.zookeeperConnect = 127.0.0.1:2181 
tier1.sources.source1.topic = test 
tier1.sources.source1.groupId = flume 
tier1.sources.source1.channels = channel1 
tier1.sources.source1.interceptors = i1 
tier1.sources.source1.interceptors.i1.type = timestamp 
tier1.sources.source1.kafka.consumer.timeout.ms = 2000 

tier1.channels.channel1.type = memory 
tier1.channels.channel1.capacity = 10000 
tier1.channels.channel1.transactionCapacity = 1000 

tier1.sinks.sink1.type = hdfs 
tier1.sinks.sink1.hdfs.path = hdfs://flume/kafka/%{topic}/%y-%m-%d 
tier1.sinks.sink1.hdfs.rollInterval = 5 
tier1.sinks.sink1.hdfs.rollSize = 0 
tier1.sinks.sink1.hdfs.rollCount = 0 
tier1.sinks.sink1.hdfs.fileType = DataStream 
tier1.sinks.sink1.channel = channel1 

現在，當我用下面的命令

bin/flume-ng agent --conf ./conf -f conf/flume.conf -Dflume.root.logger=DEBUG,console -n tier1 

我得到的控制檯輸出一遍又一遍相同的異常運行水槽：

2017-10-19 12:17:04,279 (lifecycleSupervisor-1-2) [DEBUG - org.apache.kafka.clients.NetworkClient.handleConnections(NetworkClient.java:467)] Completed connection to node 2147483647 
2017-10-19 12:17:04,279 (lifecycleSupervisor-1-2) [DEBUG - org.apache.kafka.common.network.Selector.poll(Selector.java:307)] Connection with Ubuntu-Sandbox/127.0.1.1 disconnected 
java.io.EOFException 
    at org.apache.kafka.common.network.NetworkReceive.readFromReadableChannel(NetworkReceive.java:83) 
    at org.apache.kafka.common.network.NetworkReceive.readFrom(NetworkReceive.java:71) 
    at org.apache.kafka.common.network.KafkaChannel.receive(KafkaChannel.java:153) 
    at org.apache.kafka.common.network.KafkaChannel.read(KafkaChannel.java:134) 
    at org.apache.kafka.common.network.Selector.poll(Selector.java:286) 
    at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:256) 
    at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.clientPoll(ConsumerNetworkClient.java:320) 
    at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:213) 
    at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:193) 
    at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:163) 
    at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:222) 
    at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.ensurePartitionAssignment(ConsumerCoordinator.java:311) 
    at org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:890) 
    at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:853) 
    at org.apache.flume.source.kafka.KafkaSource.doStart(KafkaSource.java:529) 
    at org.apache.flume.source.BasicSourceSemantics.start(BasicSourceSemantics.java:83) 
    at org.apache.flume.source.PollableSourceRunner.start(PollableSourceRunner.java:71) 
    at org.apache.flume.lifecycle.LifecycleSupervisor$MonitorRunnable.run(LifecycleSupervisor.java:249) 
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) 
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) 
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) 
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
    at java.lang.Thread.run(Thread.java:748) 

停止Flume的唯一方法是殺死Java進程。

我認爲這可能與Hadoop和Kafka的單獨用戶有關，但即使在使用Kafka用戶運行所有內容時，我也會得到相同的結果。我還沒有發現有關EOFException方法的任何內容，這很奇怪，因爲我剛剛遵循了「入門指南」，並且對所有內容都使用了相當標準的配置。

也許它與上一行（「Ubuntu-Sandbox/127.0.1.1已斷開連接」）有關係，因此我的虛擬機的配置？

任何幫助，高度讚賞！

Answer 1

您是否考慮過使用Kafka Connect（Apache Kafka的一部分）和HDFS connector而不是？這通常被認爲已經取代了Flume。它很容易使用，與Flume類似的基於文件的配置。