maximum connections reached on Windows running several EAP 7 instances together

Issue

• We run many EAP 7 instances together on Windows with default thread pool sizings in the IO subsystem. We begin to see high localhost socket counts equally across all the instances leading to availability issues as requests start to fail with the following error:

ERROR [io.undertow.request] (default task-7980) UT005023: Exception handling request to /app: java.lang.RuntimeException: java.io.IOException: Unable to establish loopback connection
    at io.undertow.servlet.spec.HttpServletRequestImpl.parseFormData(HttpServletRequestImpl.java:779)
    at io.undertow.servlet.spec.HttpServletRequestImpl.getParameter(HttpServletRequestImpl.java:653)
    at javax.servlet.ServletRequestWrapper.getParameter(ServletRequestWrapper.java:194)
    ...
    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:326)
    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:812)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: Unable to establish loopback connection
    at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:94)
    at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:61)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:171)
    at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
    at java.nio.channels.Pipe.open(Pipe.java:155)
    at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)
    at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
    at org.xnio.nio.NioXnio$DefaultSelectorCreator.open(NioXnio.java:272)
    at org.xnio.nio.NioXnio.getSelector(NioXnio.java:258)
    at org.xnio.nio.SelectorUtils.await(SelectorUtils.java:44)
    at org.xnio.nio.NioSocketConduit.awaitReadable(NioSocketConduit.java:358)
    at org.xnio.conduits.AbstractSourceConduit.awaitReadable(AbstractSourceConduit.java:66)
    at io.undertow.conduits.ReadDataStreamSourceConduit.awaitReadable(ReadDataStreamSourceConduit.java:101)
    at io.undertow.conduits.FixedLengthStreamSourceConduit.awaitReadable(FixedLengthStreamSourceConduit.java:285)
    at org.xnio.conduits.ConduitStreamSourceChannel.awaitReadable(ConduitStreamSourceChannel.java:151)
    at io.undertow.channels.DetachableStreamSourceChannel.awaitReadable(DetachableStreamSourceChannel.java:77)
    at io.undertow.server.HttpServerExchange$ReadDispatchChannel.awaitReadable(HttpServerExchange.java:2161)
    at io.undertow.server.handlers.form.FormEncodedDataDefinition$FormEncodedDataParser.parseBlocking(FormEncodedDataDefinition.java:254)
    at io.undertow.servlet.spec.HttpServletRequestImpl.parseFormData(HttpServletRequestImpl.java:777)
    ... 52 more
Caused by: java.net.SocketException: No buffer space available (maximum connections reached?): bind
    at sun.nio.ch.Net.bind0(Native Method)
    at sun.nio.ch.Net.bind(Net.java:433)
    at sun.nio.ch.Net.bind(Net.java:425)
    at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
    at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
    at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:67)
    at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:121)
    at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:76)
    ... 71 more