在用Jmeter做本地性能测试的时候，当并发达到1000的时候，就会出现这个错误：
DispatcherServlet – Null ModelAndView returned to DispatcherServlet with name ‘dispatch’: assuming HandlerAdapter completed request handling
DispatcherServlet.class源码：
private void processDispatchResult(HttpServletRequest request, HttpServletResponse response, HandlerExecutionChain mappedHandler, ModelAndView mv, Exception exception) throws Exception {
boolean errorView = false;
if(exception != null) {
if(exception instanceof ModelAndViewDefiningException) {
this.logger.debug("ModelAndViewDefiningException encountered", exception);
mv = ((ModelAndViewDefiningException)exception).getModelAndView();
} else {
Object handler = mappedHandler != null?mappedHandler.getHandler():null;
mv = this.processHandlerException(request, response, handler, exception);
errorView = mv != null;
}
}
if(mv != null && !mv.wasCleared()) {
this.render(mv, request, response);
if(errorView) {
WebUtils.clearErrorRequestAttributes(request);
}
} else if(this.logger.isDebugEnabled()) {
this.logger.debug("Null ModelAndView returned to DispatcherServlet with name \'" + this.getServletName() + "\': assuming HandlerAdapter completed request handling");
}
if(!WebAsyncUtils.getAsyncManager(request).isConcurrentHandlingStarted()) {
if(mappedHandler != null) {
mappedHandler.triggerAfterCompletion(request, response, (Exception)null);
}
}
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