我在读Apache·马霍特的食谱。但是我在第二章有个问题，创建一个序列文件。我用的是mahout 0.9
我执行的命令如下：

$MAHOUT_HOME/bin/mahout seqdirectory -i /home/haritz/Escritorio/work_dir/original -o /home/haritz/Escritorio/work_dir/sequencefiles

但我得到以下错误：

Running on hadoop, using /usr/local/hadoop/bin/hadoop and HADOOP_CONF_DIR=
MAHOUT-JOB: /home/haritz/mahout-distribution-0.9/mahout-examples-0.9-job.jar
15/03/16 16:45:57 INFO common.AbstractJob: Command line arguments: {--charset=[UTF-8], --chunkSize=[64], --endPhase=[2147483647], --fileFilterClass=[org.apache.mahout.text.PrefixAdditionFilter], --input=[/home/haritz/Escritorio/work_dir/original], --keyPrefix=[], --method=[mapreduce], --output=[/home/haritz/Escritorio/work_dir/sequencefiles], --startPhase=[0], --tempDir=[temp]}
15/03/16 16:45:58 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
15/03/16 16:45:58 INFO Configuration.deprecation: mapred.input.dir is deprecated. Instead, use mapreduce.input.fileinputformat.inputdir
15/03/16 16:45:58 INFO Configuration.deprecation: mapred.compress.map.output is deprecated. Instead, use mapreduce.map.output.compress
15/03/16 16:45:58 INFO Configuration.deprecation: mapred.output.dir is deprecated. Instead, use mapreduce.output.fileoutputformat.outputdir
Exception in thread "main" java.io.FileNotFoundException: File does not exist: /home/haritz/Escritorio/work_dir/original
    at org.apache.hadoop.hdfs.DistributedFileSystem$18.doCall(DistributedFileSystem.java:1122)
    at org.apache.hadoop.hdfs.DistributedFileSystem$18.doCall(DistributedFileSystem.java:1114)
    at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
    at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1114)
    at org.apache.mahout.text.SequenceFilesFromDirectory.runMapReduce(SequenceFilesFromDirectory.java:162)
    at org.apache.mahout.text.SequenceFilesFromDirectory.run(SequenceFilesFromDirectory.java:91)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
    at org.apache.mahout.text.SequenceFilesFromDirectory.main(SequenceFilesFromDirectory.java:65)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:71)
    at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:144)
    at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:152)
    at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:195)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)

有人能告诉我为什么我得到这个例外吗？谢谢您！