hadoop集群部署后，遇到的问题记录

<property>
<name>mapred.job.tracker</name>
<value>http://master:9001</value>
</property>
<property>
<name>mapred.system.dir</name>
<value>/opt/hadoop/mapred/system</value>
</property>
<property>
<name>mapred.local.dir</name>
<value>/opt/hadoop/mapred/local</value>
</property>

<property>
<name>mapred.jobhistory.address</name>

<value>http://master:10020</value>

</property>

<property>

<name>mapred.jobhistory.webapp.address</name>

<value>http://master:19888</value>

</property>
<property>
<name>mapred.jotracker.address</name>
<value>http://master:9090</value>
</property>