public ServiceOptionsBuilder maxRequestLength(long maxRequestLength) {
        checkArgument(maxRequestLength >= 0, "maxRequestLength: %s (expected: >= 0)", maxRequestLength);
        this.maxRequestLength = maxRequestLength;
        return this;
    }
Returns the server-side maximum length of a request.
core/src/main/java/com/linecorp/armeria/server/ServiceOptionsBuilder.java