flume中sink到hdfs，文件系统频繁产生文件和出现乱码，文件滚动配置不起作用？

　　问题描述 

　解决办法

　　先把这个hdfs目录下的数据删除。并修改配置文件flume-conf.properties，重新采集。

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# The configuration file needs to define the sources,
# the channels and the sinks.
# Sources, channels and sinks are defined per agent,
# in this case called 'agent'

agent1.sources = spool-source1
agent1.sinks = hdfs-sink1
agent1.channels = ch1

#Define and configure an Spool directory source
agent1.sources.spool-source1.channels=ch1
agent1.sources.spool-source1.type=spooldir
agent1.sources.spool-source1.spoolDir=/home/hadoop/data/flume/sqooldir//--/
agent1.sources.spool-source1.ignorePattern=event(_\d{}\-d{}\-d{}\_d{}\_d{})?\.log(\.COMPLETED)?
agent1.sources.spool-source1.deserializer.maxLineLength=

#Configure channel
agent1.channels.ch1.type = file
agent1.channels.ch1.checkpointDir = /home/hadoop/data/flume/checkpointDir
agent1.channels.ch1.dataDirs = /home/hadoop/data/flume/dataDirs

#Define and configure a hdfs sink
agent1.sinks.hdfs-sink1.channel = ch1
agent1.sinks.hdfs-sink1.type = hdfs
agent1.sinks.hdfs-sink1.hdfs.path = hdfs://master:9000/flume/%Y%m%d
agent1.sinks.hdfs-sink1.hdfs.useLocalTimeStamp = true
agent1.sinks.hdfs-sink1.hdfs.rollInterval =
agent1.sinks.hdfs-sink1.hdfs.rollSize =
agent1.sinks.hdfs-sink1.hdfs.rollCount =
agent1.sinks.hdfs-sink1.hdfs.minBlockReplicas=
agent1.sinks.hdfs-sink1.hdfs.idleTimeout=
#agent1.sinks.hdfs-sink1.hdfs.codeC = snappy
agent1.sinks.hdfs-sink1.hdfs.fileType=DataStream
#agent1.sinks.hdfs-sink1.hdfs.writeFormat=Text

# For each one of the sources, the type is defined
#agent.sources.seqGenSrc.type = seq

# The channel can be defined as follows.
#agent.sources.seqGenSrc.channels = memoryChannel

# Each sink's type must be defined
#agent.sinks.loggerSink.type = logger

#Specify the channel the sink should use
#agent.sinks.loggerSink.channel = memoryChannel

# Each channel's type is defined.
#agent.channels.memoryChannel.type = memory

# Other config values specific to each type of channel(sink or source)
# can be defined as well
# In this case, it specifies the capacity of the memory channel
#agent.channels.memoryChannel.capacity = 

　　教大家一招：大家在这些如flume的配置文件，最好还是去看官网，学会扩展，别只局限于别人的博客的文档，当然可以作为参考。关键还是来源于官方！

[hadoop@master sqooldir]$ $HADOOP_HOME/bin/hadoop fs -rm -r /flume/
// :: WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
// :: INFO fs.TrashPolicyDefault: Namenode trash configuration: Deletion interval =  minutes, Emptier interval =  minutes.
Deleted /flume/
[hadoop@master sqooldir]$

　　重新开启flume

[hadoop@master flume]$ pwd
/home/hadoop/app/flume
[hadoop@master flume]$ bin/flume-ng agent -n agent1 -f conf/flume-conf.properties

　　如果你的问题，还有副本数的问题，自行去解决。将$HADOOP_HOME/etc/hadoop/下的hdfs-site.xml的属性（master、slave1和slave2都要修改）

<property>
                <name>dfs.replication</name>
                <value></value>
                <description>Set to  for pseudo-distributed mode,Set to  for distributed mode,Set to  for distributed mode.</description>
 </property>

　　记得重启hadoop集群。