--- old/src/jdk.net/linux/classes/jdk/internal/net/rdma/RdmaSocketChannelImpl.java	2018-11-28 16:36:32.976693067 +0000
+++ new/src/jdk.net/linux/classes/jdk/internal/net/rdma/RdmaSocketChannelImpl.java	2018-11-28 16:36:32.588693080 +0000
@@ -91,8 +91,17 @@
 
     private Socket socket;
 
+    private static final UnsupportedOperationException unsupported;
+
+    private static final SelectorProvider checkSupported(SelectorProvider sp) {
+        if (unsupported != null)
+            throw new UnsupportedOperationException(unsupported.getMessage(), unsupported);
+        else
+            return sp;
+    }
+
     protected RdmaSocketChannelImpl(SelectorProvider sp) throws IOException {
-        super(sp);
+        super(checkSupported(sp));
         this.fd = RdmaNet.socket();
         this.fdVal = IOUtil.fdVal(fd);
     }
@@ -100,7 +109,7 @@
     protected RdmaSocketChannelImpl(SelectorProvider sp, FileDescriptor fd, boolean bound)
         throws IOException
     {
-        super(sp);
+        super(checkSupported(sp));
         this.fd = fd;
         this.fdVal = IOUtil.fdVal(fd);
         if (bound) {
@@ -113,7 +122,7 @@
     RdmaSocketChannelImpl(SelectorProvider sp, FileDescriptor fd, InetSocketAddress isa)
         throws IOException
     {
-        super(sp);
+        super(checkSupported(sp));
         this.fd = fd;
         this.fdVal = IOUtil.fdVal(fd);
         synchronized (stateLock) {
@@ -946,7 +955,7 @@
 
     // -- Native methods --
 
-    private static native void initIDs();
+    private static native void initIDs() throws UnsupportedOperationException;
 
     private static native int checkConnect(FileDescriptor fd, boolean block)
         throws IOException;
@@ -956,8 +965,14 @@
 
     static {
         IOUtil.load();
-        System.loadLibrary("extnet");        
-        initIDs();
+        System.loadLibrary("extnet");
+        UnsupportedOperationException uoe = null;
+        try {
+            initIDs();
+        } catch (UnsupportedOperationException e) {
+            uoe = e;
+        }
+        unsupported = uoe;
         nd = new RdmaSocketDispatcher();
     }