private void setExceptionChain() {
    List<EventException> exceptionChain = new ArrayList<EventException>();
    int index = 0;

    for (String rawEventException : _rawLog) {
      EventException eventException = new EventException(index, rawEventException);
      exceptionChain.add(eventException);
      index += 1;
    }
    _exceptionChain = exceptionChain;
  }
@return Returns the exception chain in the form of list of list of string.
    A list of string corresponds to an exception in the exception chain
    A string corresponds to a line in an exception
app/com/linkedin/drelephant/exceptions/LoggingEvent.java