when using -param input=s3n://foo/bar/baz/*/ blah.pig
it throws 

java.lang.NullPointerException
at 
org.apache.pig.tools.parameters.ParameterSubstitutionPreprocessor.genSubstitutedFile(ParameterSubstitutionPreprocessor.java:79)
at org.apache.pig.Main.runParamPreprocessor(Main.java:710)
at org.apache.pig.Main.run(Main.java:517)
at org.apache.pig.Main.main(Main.java:108)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.RunJar.main(RunJar.java:156)

It works when my load statement is changed from:
a = load '$input' using PigStorage();

to

a = load 's3n://foo/bar/baz/*/' using PigStorage();

(I'm under a deadline so can't file a JIRA bug rightaway)
 
-Ayon
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