Question on UTF-8

[Sheeba George]

This must be a simple question . But somehow I am not able to get it to
work.
I have a text file which has ISO Latin characters like "Cancún".
The mapper is taking "Text" as the input value.

public
void map(LongWritable key, Text value, OutputCollector<Text, IntWritable>
output, Reporter reporter) throws IOException

But the Latin characters are not recognized correctly and it throws a
MalInputException when I try
Text.validateUTF8(value.getBytes());

Any idea how to resolve this.
 Appreciate any help.

Thanks
Sheeba