hadoop - 无法在本地主机浏览 HDFS 中查看日志文件

Question

我已成功启动flume-agent，但无法查看HDFS 中的日志文件。

我在twitter.conf 中设置的路径是:

TwitterAgent.sinks.HDFS.hdfs.path = hdfs://localhost:9000/user/flume/tweets/

请帮助我摆脱这个错误并查看我的 HDFS 中的数据。

Answer 1

如果您在.bashrc 中将hadoop home 设置为

export HADOOP_HOME=<Path to your hadoop home>

那么下面就不需要localhost:9000

TwitterAgent.sinks.HDFS.hdfs.path = hdfs://localhost:9000/user/flume/tweets/

所以正确的行应该是

TwitterAgent.sinks.HDFS.hdfs.path = hdfs:///user/flume/tweets/

鉴于你的 twitter.conf 如下所示，它应该可以工作

    # Naming the components on the current agent. 
    TwitterAgent.sources = Twitter 
    TwitterAgent.channels = MemChannel 
    TwitterAgent.sinks = HDFS

    # Describing/Configuring the source 
    TwitterAgent.sources.Twitter.type = org.apache.flume.source.twitter.TwitterSource
    TwitterAgent.sources.Twitter.consumerKey = Your OAuth consumer key
    TwitterAgent.sources.Twitter.consumerSecret = Your OAuth consumer secret 
    TwitterAgent.sources.Twitter.accessToken = Your OAuth consumer key access token 
    TwitterAgent.sources.Twitter.accessTokenSecret = Your OAuth consumer key access token secret 
    TwitterAgent.sources.Twitter.keywords = tutorials point,java, bigdata, mapreduce, mahout, hbase, nosql

    # Describing/Configuring the sink 

    TwitterAgent.sinks.HDFS.type = hdfs 
    TwitterAgent.sinks.HDFS.hdfs.path = hdfs:///user/flume/tweets/
    TwitterAgent.sinks.HDFS.hdfs.fileType = DataStream 
    TwitterAgent.sinks.HDFS.hdfs.writeFormat = Text 
    TwitterAgent.sinks.HDFS.hdfs.batchSize = 1000
    TwitterAgent.sinks.HDFS.hdfs.rollSize = 0 
    TwitterAgent.sinks.HDFS.hdfs.rollCount = 10000 

    # Describing/Configuring the channel TwitterAgent.channels.MemChannel.type = memory 
    TwitterAgent.channels.MemChannel.capacity = 10000 
    TwitterAgent.channels.MemChannel.transactionCapacity = 100

    # Binding the source and sink to the channel 
    TwitterAgent.sources.Twitter.channels = MemChannel
    TwitterAgent.sinks.HDFS.channel = MemChannel 

    TwitterAgent.channels.MemChannel.type=memory

你的命令应该类似于Flume home

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

可以查看Tutorials Point为了更好的理解

注意:您始终可以通过在 flume 的日志目录中的 flume.log 中查找确切的错误来调试错误