title: hdfs-sink: how to get rid of the timestamp added in every event by flume in the HDFS files
body: <p>I have a few files which contains json in each line</p>
  
  <pre><code>[root@ip-172-29-1-12 vp_flume]# more vp_170801.txt.finished | awk '{printf("%s\n", substr($0,0,20))}'
  {"status":"OK","resp
  {"status":"OK","resp
  {"status":"OK","resp
  {"status":"OK","resp
  {"status":"OK","resp
  {"status":"OK","resp
  {"status":"OK","resp
  {"status":"OK","resp
  {"status":"OK","resp
  {"status":"OK","resp
  </code></pre>
  
  <p>My flume config is </p>
  
  <pre><code>[root@ip-172-29-1-12 flume]# cat flume_test.conf 
  agent.sources = seqGenSrc
  agent.channels = memoryChannel
  agent.sinks = loggerSink
  
  agent.sources.seqGenSrc.type = spooldir
  agent.sources.seqGenSrc.spoolDir = /moveitdata/dong/vp_flume
  agent.sources.seqGenSrc.deserializer.maxLineLength = 10000000
  agent.sources.seqGenSrc.fileSuffix = .finished
  agent.sources.seqGenSrc.deletePolicy = never
  
  agent.sources.seqGenSrc.channels = memoryChannel
  agent.sinks.loggerSink.channel = memoryChannel
  agent.channels.memoryChannel.type = memory
  agent.channels.memoryChannel.capacity = 100
  
  agent.sinks.loggerSink.type = hdfs
  agent.sinks.loggerSink.hdfs.path = /home/dong/vp_flume
  
  agent.sinks.loggerSink.hdfs.writeFormat = Text
  agent.sinks.loggerSink.hdfs.rollInterval = 0
  agent.sinks.loggerSink.hdfs.rollSize = 1000000000
  agent.sinks.loggerSink.hdfs.rollCount = 0
  </code></pre>
  
  <p>The files in HDFS is:</p>
  
  <pre><code>[root@ip-172-29-1-12 flume]# hadoop fs -text /home/dong/vp_flume/* | awk '{printf("%s\n", substr($0,0,20))}' | more
  1505276698665   {"stat
  1505276698665   {"stat
  1505276698666   {"stat
  1505276698666   {"stat
  1505276698666   {"stat
  1505276698667   {"stat
  1505276698667   {"stat
  1505276698667   {"stat
  1505276698668   {"stat
  1505276698668   {"stat
  1505276698668   {"stat
  1505276698668   {"stat
  1505276698669   {"stat
  1505276698669   {"stat
  1505276698669   {"stat
  1505276698669   {"stat
  1505276698670   {"stat
  1505276698670   {"stat
  1505276698670   {"stat
  1505276698670   {"stat
  </code></pre>
  
  <p>Question: I don't like the timestamp which is added by flume in each event. However, how can I get rid of it by configuring flume properly?</p>