title: What is the maximum input file size (without split ) for a Mapper in Hadoop MapReduce?
body: <p>I have written a MapReduce job that works on some Protobuf files as input. Owing to the nature of the files (unsplittable), each file is processed by one mapper (implemented a custom <code>FileInputFormat</code> with <code>isSplitable</code> set to <code>false</code>). The application works well with input file-sizes less than <code>~680MB</code> and produces the resulting files however, once the input file size crosses that limit, the application completes successfully but produces an empty file.</p>
  
  <p>I'm wondering if I'm hitting some limit of file-size for a Mapper? If it matters, the files are stored on Google Storage (GFS) and not HDFS.</p>
  
  <p>Thanks!</p>