Github user gss2002 commented on the issue:

    https://github.com/apache/zeppelin/pull/1447
  
    @spektom I think what happens here is this code fires.. which has nothing 
to do with the fix here.. 
    
    in LivySparkInterpreter:
          return livyHelper.interpretInput(line, interpreterContext, 
userSessionMap, out,
                  sessionId2AppIdMap.get(sessionId), 
sessionId2WebUIMap.get(sessionId), displayAppInfo);
    
    That gets called before the NoSessionException occurs.. And then in 
    LivyHelper --> public InterpreterResult interpretInput grabs the exception 
and handles it. I guess the question is can we do a rootcause on this and 
rethrow?
    
        } catch (Exception e) {
          LOGGER.error("error in interpretInput", e);
          return new InterpreterResult(Code.ERROR, e.getMessage());
        }


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