Oozie email action truncating the string containing newline chars
The action output is treated and parsed as a serialized java.util.Properties object.You can test out what works for you easily by using a Properties object and fool around with it.
E.g. something like
SHELL_OUTPUT='John,28,1,0 \Jack,32,0,15 \ Mary,45,23,12 \ Jill,33,12,55'should work.