hadoop错误："failed to report status for 600 seconds"
<property>
? <name>mapred.task.timeout</name>
? <value>600000</value>
? <description>The number of milliseconds before a task will be
? terminated if it neither reads an input, writes an output, nor
? updates its status string.
? </description>
</property>
?
由于执行合并索引操作时间较长，所以超过了600秒的时间限制，把这个值改高点就不会报错了
