ahmarsuhail opened a new pull request, #4702:
URL: https://github.com/apache/hadoop/pull/4702

   ### Description of PR
   
   Reduces the size of the data read to 1MB from the landsat file. Previously 
we were reading the entire file of ~42MB. 
   
   ### How was this patch tested?
   
   Tested by running `ITestS3Select` against eu-west-1. All tests pass, 
testSelectFullLandsat passes in 44s with debug logging on, 13s with debug 
logging off. With debug logging off, the original testSelectFullLandsat (which 
reads the whole file), is completing in 17s. 
   
   
   


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