java.lang.IllegalStateException: Cannot (forward | sendRedirect | create session) after response has been committed
A common misunderstanding among starters is that they think that the call of a forward(), sendRedirect(), or sendError() would magically exit and “jump” out of the method block, hereby ignoring the remnant of the code. For example: protected void doXxx() { if (someCondition) { sendRedirect(); } forward(); // This is STILL invoked when someCondition is … Read more