Furthermore, Text is meant for use when you have a UTF8-encoded string. Creating a Text object from a byte array that is not proper UTF-8 is likely to result in some kind of exception or data mangling. You should use BytesWritable for this purpose
-Todd 2009/12/28 Edward Capriolo <[email protected]> > Calling bitArray.toString() does not return your data. You can test > this in a standalong program. > You need to write the array out bitwise or byte wise. toString() does > not do what you want. > > Edward > > 2009/12/28 Gang Luo <[email protected]>: > > Hi all, > > I don't know too much about text coding and there is one thing confusing > me. I am implementing the bloom filter in mapreduce. The output is a bit > array (implemented as byte[ ]) and the length is 2 exp 24 (that means, > 2exp21 bytes). The size of the array should be 2 mb. But when I output it > like this: output.collect(new Text(bitArray.toString()), null); the output > file is only 10 bytes. The content of the output file is something like > this: [...@1c695a6. What does Text do when I generate a new Text object > using the bitArray (which is byte[ ])? > > > > The amazing thing is, when I use Text.getBytes() to convert it back to > byte[ ], it is exactly the same as before! How does it get the 2 mb > information by the 10 bytes Text object (the value of which is [...@1c695a6 > )? > > > > Thanks. > > > > -Gang > > > > > > ___________________________________________________________ > > 好玩贺卡等你发，邮箱贺卡全新上线！ > > http://card.mail.cn.yahoo.com/ > > >
