Program: 117518
Project: 117518
Buggy source:
@Override public Tuple getNext() throws IOException {
  mProtoTuple=new ArrayList<Object>();
  if (!mRequiredColumnsInitialized) {
    if (signature != null) {
      Properties p=UDFContext.getUDFContext().getUDFProperties(this.getClass());
      mRequiredColumns=(boolean[])ObjectSerializer.deserialize(p.getProperty(signature));
    }
    mRequiredColumnsInitialized=true;
  }
  if (tagFile) {
    mProtoTuple.add(new DataByteArray(sourcePath.getName()));
  }
 else   if (tagPath) {
    mProtoTuple.add(new DataByteArray(sourcePath.toString()));
  }
  try {
    boolean notDone=in.nextKeyValue();
    if (!notDone) {
      return null;
    }
    Text value=(Text)in.getCurrentValue();
    byte[] buf=value.getBytes();
    int len=value.getLength();
    int start=0;
    int fieldID=0;
    for (int i=0; i < len; i++) {
      if (buf[i] == fieldDel) {
        if (mRequiredColumns == null || (mRequiredColumns.length > fieldID && mRequiredColumns[fieldID]))         addTupleValue(mProtoTuple,buf,start,i);
        start=i + 1;
        fieldID++;
      }
    }
    if (start <= len && (mRequiredColumns == null || (mRequiredColumns.length > fieldID && mRequiredColumns[fieldID]))) {
      addTupleValue(mProtoTuple,buf,start,len);
    }
    Tuple t=mTupleFactory.newTupleNoCopy(mProtoTuple);
    return dontLoadSchema ? t : applySchema(t);
  }
 catch (  InterruptedException e) {
    int errCode=6018;
    String errMsg="String_Node_Str";
    throw new ExecException(errMsg,errCode,PigException.REMOTE_ENVIRONMENT,e);
  }
}

Fixed version (ground truth):
@Override public Tuple getNext() throws IOException {
  mProtoTuple=new ArrayList<Object>();
  if (!mRequiredColumnsInitialized) {
    if (signature != null) {
      Properties p=UDFContext.getUDFContext().getUDFProperties(this.getClass());
      mRequiredColumns=(boolean[])ObjectSerializer.deserialize(p.getProperty(signature));
      if (mRequiredColumns == null) {
        try {
          BroadCastClient bcc=new BroadCastClient(System.getenv("String_Node_Str"),Integer.parseInt(System.getenv("String_Node_Str")));
          boolean[] response=(boolean[])bcc.getBroadCastMessage("String_Node_Str");
          mRequiredColumns=response;
        }
 catch (        Exception e) {
          e.printStackTrace();
        }
      }
    }
    mRequiredColumnsInitialized=true;
  }
  if (tagFile) {
    mProtoTuple.add(new DataByteArray(sourcePath.getName()));
  }
 else   if (tagPath) {
    mProtoTuple.add(new DataByteArray(sourcePath.toString()));
  }
  try {
    boolean notDone=in.nextKeyValue();
    if (!notDone) {
      return null;
    }
    Text value=(Text)in.getCurrentValue();
    byte[] buf=value.getBytes();
    int len=value.getLength();
    int start=0;
    int fieldID=0;
    for (int i=0; i < len; i++) {
      if (buf[i] == fieldDel) {
        if (mRequiredColumns == null || (mRequiredColumns.length > fieldID && mRequiredColumns[fieldID]))         addTupleValue(mProtoTuple,buf,start,i);
        start=i + 1;
        fieldID++;
      }
    }
    if (start <= len && (mRequiredColumns == null || (mRequiredColumns.length > fieldID && mRequiredColumns[fieldID]))) {
      addTupleValue(mProtoTuple,buf,start,len);
    }
    Tuple t=mTupleFactory.newTupleNoCopy(mProtoTuple);
    return dontLoadSchema ? t : applySchema(t);
  }
 catch (  InterruptedException e) {
    int errCode=6018;
    String errMsg="String_Node_Str";
    throw new ExecException(errMsg,errCode,PigException.REMOTE_ENVIRONMENT,e);
  }
}