mapreduce combiner

I have biuld a distribute index using the source code of hadoop/contrib/index，but I found that when the input files become big（such as one file is 16G）,the OOM exception will be throwed .The cause is that: in combiner ,"writer.addIndexNoOptimize()",this use much memory cause to OOM, it's the Lucene

please recommend some materials of analyzing mapreduce sourcecode。

I‘m learning mapreduce，Please recommend some materials of analyzing mapreduce sourcecode. Blogs,paper,or books and so on ,all of them are OK! Thanks！ -- View this message in context: http://lucene.472066.n3.nabble.com/please-recommend-some-materials-of-analyzing-mapreduce-sourcecode-tp3652889p365

I need some materials about analyzing mapreduce sourcecode！

Please recommend me some some materials about analyzing mapreduce sourcecode，book，blogs，paper and so on，all of them are ok! Thanks! -- View this message in context: http://lucene.472066.n3.nabble.com/I-need-some-materials-about-analyzing-mapreduce-sourcecode-tp3742786p3742786.html Sent from the H