According to https://svn.apache.org/repos/asf/tomcat/trunk/java/org/apache/tomcat/util/net/Nio2Endpoint.java there is a statement saying that if the acceptorThreadCount is 0, it is being set to 1 since NIO2 does not allow any form of IO concurrency.

Setting the acceptorThreadCount to 2 in server.xml will throw an error ("Socket accept failed"). Wouldn't it be better to change the code

        // Initialize thread count defaults for acceptor, poller
        if (acceptorThreadCount == 0) {
            // NIO2 does not allow any form of IO concurrency
            acceptorThreadCount = 1;
        }

into

        // Initialize thread count defaults for acceptor, poller
        if (acceptorThreadCount != 1) {
            // NIO2 does not allow any form of IO concurrency
            acceptorThreadCount = 1;
        }

to avoid this behaviour?

Thanks,
Oliver