8027212: java/nio/channels/Selector/SelectAfterRead.java fails intermittently
Reviewed-by: chegar, ewang
--- a/jdk/test/java/nio/channels/Selector/ByteServer.java Fri Dec 13 16:15:58 2013 -0800
+++ b/jdk/test/java/nio/channels/Selector/ByteServer.java Sat Dec 14 09:27:12 2013 +0000
@@ -22,52 +22,54 @@
*/
/**
- *
- * Utility class for tests. A simple server, which waits for a connection,
- * writes out n bytes and waits.
+ * Utility class for tests. A simple "in-thread" server to accept connections
+ * and write bytes.
* @author kladko
*/
import java.net.Socket;
import java.net.ServerSocket;
-
-public class ByteServer {
+import java.net.SocketAddress;
+import java.net.InetSocketAddress;
+import java.io.IOException;
+import java.io.Closeable;
- public static final String LOCALHOST = "localhost";
- private int bytecount;
- private Socket socket;
- private ServerSocket serversocket;
- private Thread serverthread;
- volatile Exception savedException;
+public class ByteServer implements Closeable {
- public ByteServer(int bytecount) throws Exception{
- this.bytecount = bytecount;
- serversocket = new ServerSocket(0);
+ private final ServerSocket ss;
+ private Socket s;
+
+ ByteServer() throws IOException {
+ this.ss = new ServerSocket(0);
}
- public int port() {
- return serversocket.getLocalPort();
+ SocketAddress address() {
+ return new InetSocketAddress(ss.getInetAddress(), ss.getLocalPort());
}
- public void start() {
- serverthread = new Thread() {
- public void run() {
- try {
- socket = serversocket.accept();
- socket.getOutputStream().write(new byte[bytecount]);
- socket.getOutputStream().flush();
- } catch (Exception e) {
- System.err.println("Exception in ByteServer: " + e);
- System.exit(1);
- }
- }
- };
- serverthread.start();
+ void acceptConnection() throws IOException {
+ if (s != null)
+ throw new IllegalStateException("already connected");
+ this.s = ss.accept();
}
- public void exit() throws Exception {
- serverthread.join();
- socket.close();
- serversocket.close();
+ void closeConnection() throws IOException {
+ Socket s = this.s;
+ if (s != null) {
+ this.s = null;
+ s.close();
+ }
+ }
+
+ void write(int count) throws IOException {
+ if (s == null)
+ throw new IllegalStateException("no connection");
+ s.getOutputStream().write(new byte[count]);
+ }
+
+ public void close() throws IOException {
+ if (s != null)
+ s.close();
+ ss.close();
}
}
--- a/jdk/test/java/nio/channels/Selector/ReadAfterConnect.java Fri Dec 13 16:15:58 2013 -0800
+++ b/jdk/test/java/nio/channels/Selector/ReadAfterConnect.java Sat Dec 14 09:27:12 2013 +0000
@@ -27,27 +27,25 @@
* @author kladko
*/
-import java.net.*;
-import java.nio.*;
-import java.nio.channels.*;
+import java.nio.channels.Selector;
+import java.nio.channels.SelectionKey;
+import java.nio.channels.SocketChannel;
public class ReadAfterConnect {
+ public static void main(String[] argv) throws Exception {
+ try (ByteServer server = new ByteServer();
+ SocketChannel sc = SocketChannel.open(server.address())) {
- public static void main(String[] argv) throws Exception {
- ByteServer server = new ByteServer(0); // server: accept connection and do nothing
- server.start();
- InetSocketAddress isa = new InetSocketAddress(
- InetAddress.getByName(ByteServer.LOCALHOST), server.port());
- Selector sel = Selector.open();
- SocketChannel sc = SocketChannel.open();
- sc.connect(isa);
- sc.configureBlocking(false);
- sc.register(sel, SelectionKey.OP_READ);
- // Previously channel would get selected here, although there is nothing to read
- if (sel.selectNow() != 0)
- throw new Exception("Select returned nonzero value");
- sc.close();
- server.exit();
+ server.acceptConnection();
+
+ try (Selector sel = Selector.open()) {
+ sc.configureBlocking(false);
+ sc.register(sel, SelectionKey.OP_READ);
+ // Previously channel would get selected here, although there is nothing to read
+ if (sel.selectNow() != 0)
+ throw new Exception("Select returned nonzero value");
+ }
+ }
}
}
--- a/jdk/test/java/nio/channels/Selector/SelectAfterRead.java Fri Dec 13 16:15:58 2013 -0800
+++ b/jdk/test/java/nio/channels/Selector/SelectAfterRead.java Sat Dec 14 09:27:12 2013 +0000
@@ -28,60 +28,62 @@
* @author kladko
*/
-import java.net.*;
-import java.nio.*;
-import java.nio.channels.*;
+import java.nio.ByteBuffer;
+import java.nio.channels.Selector;
+import java.nio.channels.SelectionKey;
+import java.nio.channels.SocketChannel;
public class SelectAfterRead {
- final static int TIMEOUT = 1000;
+ private static final int TIMEOUT = 1000;
public static void main(String[] argv) throws Exception {
- InetAddress lh = InetAddress.getByName(ByteServer.LOCALHOST);
// server: accept connection and write one byte
- ByteServer server = new ByteServer(1);
- server.start();
- Selector sel = Selector.open();
- SocketChannel sc = SocketChannel.open();
- sc.connect(new InetSocketAddress(lh, server.port()));
- sc.read(ByteBuffer.allocate(1));
- sc.configureBlocking(false);
- sc.register(sel, SelectionKey.OP_READ);
- // previously on Windows select would select channel here, although there was
- // nothing to read
- if (sel.selectNow() != 0)
- throw new Exception("Select returned nonzero value");
- sc.close();
- sel.close();
- server.exit();
+ try (ByteServer server = new ByteServer();
+ SocketChannel sc = SocketChannel.open(server.address())) {
+
+ server.acceptConnection();
+ server.write(1);
+
+ try (Selector sel = Selector.open()) {
+ sc.read(ByteBuffer.allocate(1));
+ sc.configureBlocking(false);
+ sc.register(sel, SelectionKey.OP_READ);
+ // previously on Windows select would select channel here, although there was
+ // nothing to read
+ if (sel.selectNow() != 0)
+ throw new Exception("Select returned nonzero value");
+ }
+ }
// Now we will test a two reads combination
// server: accept connection and write two bytes
- server = new ByteServer(2);
- server.start();
- sc = SocketChannel.open();
- sc.connect(new InetSocketAddress(lh, server.port()));
- sc.configureBlocking(false);
- sel = Selector.open();
- sc.register(sel, SelectionKey.OP_READ);
- if (sel.select(TIMEOUT) != 1)
- throw new Exception("One selected key expected");
- sel.selectedKeys().clear();
- // previously on Windows a channel would get selected only once
- if (sel.selectNow() != 1)
- throw new Exception("One selected key expected");
- // Previously on Windows two consequent reads would cause select()
- // to select a channel, although there was nothing remaining to
- // read in the channel
- if (sc.read(ByteBuffer.allocate(1)) != 1)
- throw new Exception("One byte expected");
- if (sc.read(ByteBuffer.allocate(1)) != 1)
- throw new Exception("One byte expected");
- if (sel.selectNow() != 0)
- throw new Exception("Select returned nonzero value");
- sc.close();
- sel.close();
- server.exit();
+ try (ByteServer server = new ByteServer();
+ SocketChannel sc = SocketChannel.open(server.address())) {
+
+ server.acceptConnection();
+ server.write(2);
+
+ try (Selector sel = Selector.open()) {
+ sc.configureBlocking(false);
+ sc.register(sel, SelectionKey.OP_READ);
+ if (sel.select(TIMEOUT) != 1)
+ throw new Exception("One selected key expected");
+ sel.selectedKeys().clear();
+ // previously on Windows a channel would get selected only once
+ if (sel.selectNow() != 1)
+ throw new Exception("One selected key expected");
+ // Previously on Windows two consequent reads would cause select()
+ // to select a channel, although there was nothing remaining to
+ // read in the channel
+ if (sc.read(ByteBuffer.allocate(1)) != 1)
+ throw new Exception("One byte expected");
+ if (sc.read(ByteBuffer.allocate(1)) != 1)
+ throw new Exception("One byte expected");
+ if (sel.selectNow() != 0)
+ throw new Exception("Select returned nonzero value");
+ }
+ }
}
}
--- a/jdk/test/java/nio/channels/Selector/SelectWrite.java Fri Dec 13 16:15:58 2013 -0800
+++ b/jdk/test/java/nio/channels/Selector/SelectWrite.java Sat Dec 14 09:27:12 2013 +0000
@@ -22,36 +22,33 @@
*/
/* @test
- @bug 4645302
- @summary Socket with OP_WRITE would get selected only once
- @author kladko
+ * @bug 4645302
+ * @summary Socket with OP_WRITE would get selected only once
+ * @author kladko
*/
-import java.net.*;
-import java.nio.*;
-import java.nio.channels.*;
-
+import java.nio.channels.Selector;
+import java.nio.channels.SelectionKey;
+import java.nio.channels.SocketChannel;
public class SelectWrite {
public static void main(String[] argv) throws Exception {
- ByteServer server = new ByteServer(0);
- // server: accept connection and do nothing
- server.start();
- InetSocketAddress isa = new InetSocketAddress(
- InetAddress.getByName(ByteServer.LOCALHOST), server.port());
- Selector sel = Selector.open();
- SocketChannel sc = SocketChannel.open();
- sc.connect(isa);
- sc.configureBlocking(false);
- sc.register(sel, SelectionKey.OP_WRITE);
- sel.select();
- sel.selectedKeys().clear();
- if (sel.select() == 0) {
- throw new Exception("Select returned zero");
+ try (ByteServer server = new ByteServer();
+ SocketChannel sc = SocketChannel.open(server.address())) {
+
+ server.acceptConnection();
+
+ try (Selector sel = Selector.open()) {
+ sc.configureBlocking(false);
+ sc.register(sel, SelectionKey.OP_WRITE);
+ sel.select();
+ sel.selectedKeys().clear();
+ if (sel.select() == 0) {
+ throw new Exception("Select returned zero");
+ }
+ }
}
- sc.close();
- sel.close();
}
}