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Flume, mail # user - strange flume hdfs put

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strange flume hdfs put
周梦想 2013-02-19, 03:09
I put some data to hdfs via flume 1.3.1,but it changed!

source data:
[zhouhh@Hadoop47 ~]$  echo "<13>Mon Feb 18 18:25:26 2013 hello world zhh "
| nc -v hadoop48 5140
Connection to hadoop48 5140 port [tcp/*] succeeded!

the flume agent received:
13/02/19 10:43:46 INFO hdfs.BucketWriter: Creating
13/02/19 10:44:16 INFO hdfs.BucketWriter: Renaming
hdfs://Hadoop48:54310/flume/FlumeData.1361241606972.tmp to

the content in hdfs:

[zhouhh@Hadoop47 ~]$ hadoop fs -cat
Feb 18 18:25:26 2013 hello world zhh
[zhouhh@Hadoop47 ~]$

I don't know why there is some data like
"org.apache.hadoop.io.LongWritable",there are some bugs?

Best Regards,