private void consumeRequestContent() {
            if (content.isConnected()) return;
            ReadableContentChannel requestContent = new ReadableContentChannel();
            try {
                content.connectTo(requestContent);
            } catch (IllegalStateException e) {
                return;
            }
            while (requestContent.read() != null) {
                // consume all ignored content
            }
        }
Invoked to write an error response when the worker pool is overloaded.
A subclass may override this method to define a custom response.
container-core/src/main/java/com/yahoo/container/jdisc/ThreadedRequestHandler.java