使用hadoop多节点设置（1个mater，1个salve）
在master上启动start-mapred.sh后，我在tt日志（slave an）中发现以下错误
org.apache.hadoop.mapred.tasktracker:获取系统目录失败
有人能帮我知道怎样才能避免这个错误吗
我使用的是hadoop 1.2.0 jetty-6.1.26 java版本“1.6.0\u 23”
mapred-site.xml文件

<configuration>
<property>
  <name>mapred.job.tracker</name>
  <value>master:54311</value>
  <description>The host and port that the MapReduce job tracker runs
  at.  If "local", then jobs are run in-process as a single map
  and reduce task.
  </description>
</property>
<property>
  <name>mapred.map.tasks</name>
    <value>1</value>
      <description>
          define mapred.map tasks to be number of slave hosts
</description>
</property>

<property>
  <name>mapred.reduce.tasks</name>
    <value>1</value>
      <description>
          define mapred.reduce tasks to be number of slave hosts
</description>
</property>

</configuration>

core-site.xml文件

<configuration>
<property>
  <name>fs.default.name</name>
  <value>hdfs://master:54310</value>
  <description>The name of the default file system.  A URI whose
  scheme and authority determine the FileSystem implementation.  The
  uri's scheme determines the config property (fs.SCHEME.impl) naming
  the FileSystem implementation class.  The uri's authority is used to
  determine the host, port, etc. for a filesystem.</description>
</property>
<property>
  <name>hadoop.tmp.dir</name>
  <value>/home/hduser/workspace</value>
</property>
</configuration>