為什么我的 Flume 代理沒有啟動？

Question

我正在嘗試建立一個基本的 Kafka-Flume-HDFS 管道。 Kafka 已啟動並正在運行，但是當我通過以下方式啟動水槽代理時

bin/flume-ng agent -n flume1 -c conf -f conf/flume-conf.properties -D flume.root.logger=INFO,console

似乎代理沒有出現，因為我得到的唯一控制台日志是：

Info: Sourcing environment configuration script /opt/hadoop/flume/conf/flume-env.sh
Info: Including Hive libraries found via () for Hive access
+ exec /opt/jdk1.8.0_111/bin/java -Xmx20m -D -cp '/opt/hadoop/flume/conf:/opt/hadoop/flume/lib/*:/opt/hadoop/flume/lib/:/lib/*' -Djava.library.path= org.apache.flume.node.Application -n flume1 -f conf/flume-conf.properties flume.root.logger=INFO,console
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/opt/hadoop/flume/lib/slf4j-log4j12-1.6.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/opt/hadoop/flume/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]

水槽配置文件：

flume1.sources = kafka-source-1
flume1.channels = hdfs-channel-1
flume1.sinks = hdfs-sink-1
flume1.sources.kafka-source-1.type = org.apache.flume.source.kafka.KafkaSource
flume1.sources.kafka-source-1.zookeeperConnect = localhost:2181
flume1.sources.kafka-source-1.topic = twitter_topic
flume1.sources.kafka-source-1.batchSize = 100
flume1.sources.kafka-source-1.channels = hdfs-channel-1

flume1.channels.hdfs-channel-1.type = memory
flume1.sinks.hdfs-sink-1.channel = hdfs-channel-1
flume1.sinks.hdfs-sink-1.type = hdfs
flume1.sinks.hdfs-sink-1.hdfs.writeFormat = Text
flume1.sinks.hdfs-sink-1.hdfs.fileType = DataStream
flume1.sinks.hdfs-sink-1.hdfs.filePrefix = test-events
flume1.sinks.hdfs-sink-1.hdfs.useLocalTimeStamp = true
flume1.sinks.hdfs-sink-1.hdfs.path = /tmp/kafka/twitter_topic/%y-%m-%d
flume1.sinks.hdfs-sink-1.hdfs.rollCount= 100
flume1.sinks.hdfs-sink-1.hdfs.rollSize= 0
flume1.channels.hdfs-channel-1.capacity = 10000
flume1.channels.hdfs-channel-1.transactionCapacity = 1000

這是flume-conf.properties的配置問題還是我遺漏了一些重要的東西？

編輯

重新啟動一切后，它似乎比以前工作得更好，Flume 現在實際上正在做一些事情（在啟動 hdfs、zookeeper、kafka、flume 和我的流應用程序時，順序似乎很重要）。 我現在從水槽中得到一個例外

java.lang.NoSuchMethodException: org.apache.hadoop.fs.LocalFileSystem.isFileClosed(org.apache.hadoop.fs.path)
...

Answer 1

使用完整的 HDFS URI 編輯hdfs.path值，

flume1.sinks.hdfs-sink-1.hdfs.path = hdfs://namenode_host:port/tmp/kafka/twitter_topic/%y-%m-%d

對於日志：日志沒有打印在控制台上，刪除-D和flume.root.logger=INFO,console之間的空格。

嘗試，

bin/flume-ng agent -n flume1 -c conf -f conf/flume-conf.properties -Dflume.root.logger=INFO,console

或者從$FLUME_HOME/logs/目錄訪問日志。