Pig does not call checkOutSpecs() on OutputFormat provided by StoreFunc in the 
multistore case

                 Key: PIG-1063
                 URL: https://issues.apache.org/jira/browse/PIG-1063
             Project: Pig
          Issue Type: Bug
    Affects Versions: 0.4.0
            Reporter: Pradeep Kamath
            Assignee: Pradeep Kamath

A StoreFunc implementation can inform pig of an OutputFormat it uses through 
the getStoragePreparationClass() method. In a query with multiple stores which 
gets optimized into a single mapred job, Pig does not call the 
checkOutputSpecs() method on the outputformat. An example of such a script is:
a = load 'input.txt';
b = filter a by $0 < 10;
store b into 'output1' using StoreWithOutputFormat();
c = group a by $0;
d = foreach c generate group, COUNT(a.$0);
store d into 'output2' using StoreWithOutputFormat();

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