--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/nio/channels/Selector/CloseWhenKeyIdle.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,133 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/* @test
+ * @bug 6403933
+ * @summary POLLHUP or POLLERR on "idle" key can cause Selector to spin
+ */
+
+import java.io.*;
+import java.net.*;
+import java.nio.*;
+import java.nio.channels.*;
+import java.net.*;
+import java.nio.channels.*;
+
+public class CloseWhenKeyIdle {
+
+ // indicates if the wakeup has happened
+ static volatile boolean wakeupDone = false;
+
+ // Wakes up a Selector after a given delay
+ static class Waker implements Runnable {
+ private Selector sel;
+ private long delay;
+
+ Waker(Selector sel, long delay) {
+ this.sel = sel;
+ this.delay = delay;
+ }
+
+ public void run() {
+ try {
+ Thread.sleep(delay);
+ wakeupDone = true;
+ sel.wakeup();
+ } catch (Exception x) {
+ x.printStackTrace();
+ }
+ }
+ }
+
+
+ public static void main(String[] args) throws Exception {
+
+ // Skip test on pre-2.6 kernels until the poll SelectorProvider
+ // is updated
+ String osname = System.getProperty("os.name");
+ if (osname.equals("Linux")) {
+ String[] ver = System.getProperty("os.version").split("\\.", 0);
+ if (ver.length >=2 ) {
+ int major = Integer.parseInt(ver[0]);
+ int minor = Integer.parseInt(ver[1]);
+ if (major < 2 || (major == 2 && minor < 6)) {
+ System.out.println("Test passing on pre-2.6 kernel");
+ return;
+ }
+ }
+ }
+
+
+ // establish loopback connection
+
+ ServerSocketChannel ssc = ServerSocketChannel.open();
+ ssc.socket().bind(new InetSocketAddress(0));
+
+ SocketAddress remote = new InetSocketAddress(InetAddress.getLocalHost(),
+ ssc.socket().getLocalPort());
+
+ SocketChannel sc1 = SocketChannel.open(remote);
+ SocketChannel sc2 = ssc.accept();
+
+ // register channel for one end with a Selector, interest set = 0
+
+ Selector sel = Selector.open();
+
+ sc1.configureBlocking(false);
+ SelectionKey k = sc1.register(sel, 0);
+ sel.selectNow();
+
+ // hard close to provoke POLLHUP
+
+ sc2.socket().setSoLinger(true, 0);
+ sc2.close();
+
+ // schedule wakeup after a few seconds
+
+ Thread t = new Thread(new Waker(sel, 5000));
+ t.setDaemon(true);
+ t.start();
+
+ // select should block
+
+ int spinCount = 0;
+ for (;;) {
+ int n = sel.select();
+ if (n > 0)
+ throw new RuntimeException("channel should not be selected");
+
+ // wakeup
+ if (wakeupDone)
+ break;
+
+ // wakeup for no reason - if it happens a few times then we have a
+ // problem
+ spinCount++;
+ if (spinCount >= 3)
+ throw new RuntimeException("Selector appears to be spinning");
+ }
+
+ System.out.println("PASS");
+ }
+
+}