报错背景：
CDH集群中，将kafka和Flume整合，将kafka的数据发送给Flume消费。
启动kafka的时候正常，但是启动Flume的时候出现了报错现象。
报错现象：
DH-5.15.1-1.cdh5.15.1.p0.4/lib/hadoop/lib/native:/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/lib/hbase/bin/../lib/native/Linux-amd64-64 19/05/15 14:58:09 INFO zookeeper.ZooKeeper: Client environment:java.io.tmpdir=/tmp 19/05/15 14:58:09 INFO zookeeper.ZooKeeper: Client environment:java.compiler=<NA> 19/05/15 14:58:09 INFO zookeeper.ZooKeeper: Client environment:os.name=Linux 19/05/15 14:58:09 INFO zookeeper.ZooKeeper: Client environment:os.arch=amd64 19/05/15 14:58:09 INFO zookeeper.ZooKeeper: Client environment:os.version=3.10.0-862.el7.x86_64 19/05/15 14:58:09 INFO zookeeper.ZooKeeper: Client environment:user.name=root 19/05/15 14:58:09 INFO zookeeper.ZooKeeper: Client environment:user.home=/root 19/05/15 14:58:09 INFO zookeeper.ZooKeeper: Client environment:user.dir=/opt/cloudera/parcels/CDH-5.15.1-1.cdh5.15.1.p0.4/etc/flume-ng/conf.empty 19/05/15 14:58:09 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=192.168.52.26:2181 sessionTimeout=30000 watcher=org.I0Itec.zkclient.ZkClient@2ad96f71 19/05/15 14:58:09 INFO zkclient.ZkClient: Waiting for keeper state SyncConnected 19/05/15 14:58:09 INFO zookeeper.ClientCnxn: Opening socket connection to server master/192.168.52.26:2181. Will not attempt to authenticate using SASL (unknown error) 19/05/15 14:58:09 INFO zookeeper.ClientCnxn: Socket connection established, initiating session, client: /192.168.52.26:60816, server: master/192.168.52.26:2181 19/05/15 14:58:09 INFO zookeeper.ClientCnxn: Session establishment complete on server master/192.168.52.26:2181, sessionid = 0x36ab52d38c20b13, negotiated timeout = 30000 19/05/15 14:58:09 INFO zkclient.ZkClient: zookeeper state changed (SyncConnected) 19/05/15 14:58:10 INFO zkclient.ZkEventThread: Terminate ZkClient event thread. 19/05/15 14:58:10 INFO zookeeper.ZooKeeper: Session: 0x36ab52d38c20b13 closed 19/05/15 14:58:10 INFO kafka.KafkaSource: Group ID was not specified. Using flume as the group id. 19/05/15 14:58:10 INFO zookeeper.ClientCnxn: EventThread shut down 19/05/15 14:58:10 INFO sink.DefaultSinkFactory: Creating instance of sink: hdfsSink, type: hdfs 19/05/15 14:58:10 INFO node.AbstractConfigurationProvider: Channel memoryChannel connected to [kafkaSource, hdfsSink] 19/05/15 14:58:10 INFO node.Application: Starting new configuration:{ sourceRunners:{kafkaSource=PollableSourceRunner: { source:org.apache.flume.source.kafka.KafkaSource{name:kafkaSource,state:IDLE} counterGroup:{ name:null counters:{} } }} sinkRunners:{hdfsSink=SinkRunner: { policy:org.apache.flume.sink.DefaultSinkProcessor@414aa552 counterGroup:{ name:null counters:{} } }} channels:{memoryChannel=org.apache.flume.channel.MemoryChannel{name: memoryChannel}} } 19/05/15 14:58:10 INFO node.Application: Starting Channel memoryChannel 19/05/15 14:58:10 INFO node.Application: Waiting for channel: memoryChannel to start. Sleeping for 500 ms 19/05/15 14:58:10 INFO instrumentation.MonitoredCounterGroup: Monitored counter group for type: CHANNEL, name: memoryChannel: Successfully registered new MBean. 19/05/15 14:58:10 INFO instrumentation.MonitoredCounterGroup: Component type: CHANNEL, name: memoryChannel started 19/05/15 14:58:10 INFO node.Application: Starting Sink hdfsSink 19/05/15 14:58:10 INFO node.Application: Starting Source kafkaSource 19/05/15 14:58:10 INFO kafka.KafkaSource: Starting org.apache.flume.source.kafka.KafkaSource{name:kafkaSource,state:IDLE}... 19/05/15 14:58:10 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=192.168.52.26:2181 sessionTimeout=30000 watcher=org.I0Itec.zkclient.ZkClient@6bbdc6fd 19/05/15 14:58:10 INFO zkclient.ZkEventThread: Starting ZkClient event thread. 19/05/15 14:58:10 INFO zkclient.ZkClient: Waiting for keeper state SyncConnected 19/05/15 14:58:10 INFO zookeeper.ClientCnxn: Opening socket connection to server master/192.168.52.26:2181. Will not attempt to authenticate using SASL (unknown error) 19/05/15 14:58:10 INFO zookeeper.ClientCnxn: Socket connection established, initiating session, client: /192.168.52.26:60890, server: master/192.168.52.26:2181 19/05/15 14:58:10 INFO instrumentation.MonitoredCounterGroup: Monitored counter group for type: SINK, name: hdfsSink: Successfully registered new MBean. 19/05/15 14:58:10 INFO instrumentation.MonitoredCounterGroup: Component type: SINK, name: hdfsSink started 19/05/15 14:58:10 INFO zookeeper.ClientCnxn: Session establishment complete on server master/192.168.52.26:2181, sessionid = 0x36ab52d38c20b14, negotiated timeout = 30000 19/05/15 14:58:10 INFO zkclient.ZkClient: zookeeper state changed (SyncConnected) 19/05/15 14:58:10 INFO consumer.ConsumerConfig: ConsumerConfig values: auto.commit.interval.ms = 5000 auto.offset.reset = latest bootstrap.servers = [master:9092, worker1:9092, worker2:9092] check.crcs = true client.id = connections.max.idle.ms = 540000 enable.auto.commit = false exclude.internal.topics = true fetch.max.bytes = 52428800 fetch.max.wait.ms = 500 fetch.min.bytes = 1 group.id = flume heartbeat.interval.ms = 3000 interceptor.classes = null internal.leave.group.on.close = true key.deserializer = class org.apache.kafka.common.serialization.StringDeserializer max.partition.fetch.bytes = 1048576 max.poll.interval.ms = 300000 max.poll.records = 500 metadata.max.age.ms = 300000 metric.reporters = [] metrics.num.samples = 2 metrics.recording.level = INFO metrics.sample.window.ms = 30000 partition.assignment.strategy = [class org.apache.kafka.clients.consumer.RangeAssignor] receive.buffer.bytes = 65536 reconnect.backoff.ms = 50 request.timeout.ms = 305000 retry.backoff.ms = 100 sasl.jaas.config = null sasl.kerberos.kinit.cmd = /usr/bin/kinit sasl.kerberos.min.time.before.relogin = 60000 sasl.kerberos.service.name = null sasl.kerberos.ticket.renew.jitter = 0.05 sasl.kerberos.ticket.renew.window.factor = 0.8 sasl.mechanism = GSSAPI security.protocol = PLAINTEXT send.buffer.bytes = 131072 session.timeout.ms = 10000 ssl.cipher.suites = null ssl.enabled.protocols = [TLSv1.2, TLSv1.1, TLSv1] ssl.endpoint.identification.algorithm = null ssl.key.password = null ssl.keymanager.algorithm = SunX509 ssl.keystore.location = null ssl.keystore.password = null ssl.keystore.type = JKS ssl.protocol = TLS ssl.provider = null ssl.secure.random.implementation = null ssl.trustmanager.algorithm = PKIX ssl.truststore.location = null ssl.truststore.password = null ssl.truststore.type = JKS value.deserializer = class org.apache.kafka.common.serialization.ByteArrayDeserializer 19/05/15 14:58:10 WARN consumer.ConsumerConfig: The configuration 'timeout.ms' was supplied but isn't a known config. 19/05/15 14:58:10 INFO utils.AppInfoParser: Kafka version : 0.10.2-kafka-2.2.0 19/05/15 14:58:10 INFO utils.AppInfoParser: Kafka commitId : unknown
报错原因：
这个报错并不是Flume的原因，而是kafka的锅。kafka由于某些原因报错，导致Flume连接kafka的时候报错。解决报错的时候需要去定位并解决kafka的报错。
报错解决：
未解决。。。