package com.mirox.weblog; //error here -The type    org.apache.commons.logging.Log cannot be resolved. It is indirectly referenced from required .class files

import java.io.IOException;
import java.text.SimpleDateFormat;
import org.apache.pig.EvalFunc;
import org.apache.pig.data.Tuple;

/* To convert date to hive usable format

* /

public class Date_udf extends EvalFunc{

public String exec(Tuple input)
{
    if(input == null || input.size() == 0)
        return null;
    String s = "";
    String p = "";
    try
    {
        if(input.get(0) != null) //error here in input.get(0) -The type org.apache.hadoop.io.WritableComparable cannot be resolved. It is indirectly referenced from required .class files
        {
            s = input.get(0).toString();
            SimpleDateFormat fromFormat = new SimpleDateFormat("dd/MMM/yyyy:HH:mm:ss");//input date format
            SimpleDateFormat toFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//output date +format
            p = toFormat.format(fromFormat.parse(s));// converting date format
        }
    }
    catch(Exception e)
    {
        e.printStackTrace();
    }
    return p;
}}

我正在做的项目是使用hadoop（pig、hive、scoop、oozie）进行web日志分析（攻击检测）
尝试在web/inf中添加lib，添加了commons codec 1.10、commons fileupload 1.3.1、commons io 2.5以及我能找到的所有其他lib。
我以前没有犯过这些错误。
我是个初学者，如果您能提供帮助/解决方案，我将不胜感激。