測試單詞統計時，運行yarn jar XX.jar 出現如下報錯:
Caused by: java.io.IOException: Initialization of all the collectors failed. Error in last collector was :class com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$Text
原因是在java類中Text引用的是import com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider.Text;
修改為import org.apache.hadoop.io.Text;
測試運行通過