title: Cannot solve these errors Java (Pig UDF) adding libraries, org.apache
body: <pre><code>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;
  }}
  </code></pre>
  
  <p>The project I am doing is Web-log analysis (attack detection )using Hadoop (pig, hive, scoop, oozie)</p>
  
  <p>Tried adding libs in WEB/INF,added commons codec 1.10, commons fileupload 1.3.1, commons io 2.5, and all other libs that I could find.</p>
  
  <p>I wasn't getting these errors before.</p>
  
  <p>I'm a beginner a help/fix would be hugely appreciated.</p>