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The following page has been changed by SanthoshSrinivasan:
http://wiki.apache.org/pig/PigErrorHandlingDesign

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  == Open questions ==
  
-    1. `ParseException` is throw by the parser. Ensuring that `ParseException` 
is subclassed from `FrontendException` requires the generated 
`ParseException.java` file to be checked into the source repository. Instead, 
the `ParseException` is wrapped inside `PigParseException` and rethrown.
+    1. `ParseException` is throw by the parser. Ensuring that `ParseException` 
is subclassed from `FrontendException` requires the generated 
`ParseException.java` file to be checked into the source repository. Instead, 
the `ParseException` is wrapped inside `FrontendParseException` and rethrown.
-    2. Lexical errors in Grunt will result in a `TokenMgrError`, resulting in 
an exit from Grunt.
+    2. Lexical errors in Grunt will result in a `TokenMgrError`, resulting in 
a possible exit from Grunt.
     3. Error messages reported by the Parser will not be overridden with 
custom error messages till we move to a bottom up parser.
  
  == References ==

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