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Resolved issue: NETTY-256 (A race condition during the recommended server shutdown procedure)

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* Fixed a bug in the socket transport implementations where a new connection can be accepted after the ChannelFuture of ServerSocketChannel.close() is complete.
* Introduced a lock to ensure that the boss thread is terminated before notifying the future
This commit is contained in:
Trustin Lee 2009-11-30 11:59:00 +00:00
parent 1688569758
commit 42d2f79239
4 changed files with 42 additions and 14 deletions
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3
src/main/java/org/jboss/netty/channel/socket/nio/NioServerSocketChannel.java
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@ -20,6 +20,8 @@ import static org.jboss.netty.channel.Channels.*;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.channels.ServerSocketChannel;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import org.jboss.netty.channel.AbstractServerChannel;
import org.jboss.netty.channel.ChannelException;
@ -46,6 +48,7 @@ class NioServerSocketChannel extends AbstractServerChannel
InternalLoggerFactory.getInstance(NioServerSocketChannel.class);
final ServerSocketChannel socket;
final Lock shutdownLock = new ReentrantLock();
private final ServerSocketChannelConfig config;
NioServerSocketChannel(

11
src/main/java/org/jboss/netty/channel/socket/nio/NioServerSocketPipelineSink.java
View File

@ -175,6 +175,12 @@ class NioServerSocketPipelineSink extends AbstractChannelSink {
boolean bound = channel.isBound();
try {
channel.socket.close();
// Make sure the boss thread is not running so that that the future
// is notified after a new connection cannot be accepted anymore.
// See NETTY-256 for more information.
channel.shutdownLock.lock();
try {
if (channel.setClosed()) {
future.setSuccess();
if (bound) {
@ -184,6 +190,9 @@ class NioServerSocketPipelineSink extends AbstractChannelSink {
} else {
future.setSuccess();
}
} finally {
channel.shutdownLock.unlock();
}
} catch (Throwable t) {
future.setFailure(t);
fireExceptionCaught(channel, t);
@ -218,6 +227,7 @@ class NioServerSocketPipelineSink extends AbstractChannelSink {
public void run() {
final Thread currentThread = Thread.currentThread();
channel.shutdownLock.lock();
for (;;) {
try {
if (selector.select(1000) > 0) {
@ -249,6 +259,7 @@ class NioServerSocketPipelineSink extends AbstractChannelSink {
}
}
channel.shutdownLock.unlock();
closeSelector();
}

3
src/main/java/org/jboss/netty/channel/socket/oio/OioServerSocketChannel.java
View File

@ -20,6 +20,8 @@ import static org.jboss.netty.channel.Channels.*;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import org.jboss.netty.channel.AbstractServerChannel;
import org.jboss.netty.channel.ChannelException;
@ -47,6 +49,7 @@ class OioServerSocketChannel extends AbstractServerChannel
InternalLoggerFactory.getInstance(OioServerSocketChannel.class);
final ServerSocket socket;
final Lock shutdownLock = new ReentrantLock();
private final ServerSocketChannelConfig config;
OioServerSocketChannel(

11
src/main/java/org/jboss/netty/channel/socket/oio/OioServerSocketPipelineSink.java
View File

@ -164,6 +164,12 @@ class OioServerSocketPipelineSink extends AbstractChannelSink {
boolean bound = channel.isBound();
try {
channel.socket.close();
// Make sure the boss thread is not running so that that the future
// is notified after a new connection cannot be accepted anymore.
// See NETTY-256 for more information.
channel.shutdownLock.lock();
try {
if (channel.setClosed()) {
future.setSuccess();
if (bound) {
@ -173,6 +179,9 @@ class OioServerSocketPipelineSink extends AbstractChannelSink {
} else {
future.setSuccess();
}
} finally {
channel.shutdownLock.unlock();
}
} catch (Throwable t) {
future.setFailure(t);
fireExceptionCaught(channel, t);
@ -187,6 +196,7 @@ class OioServerSocketPipelineSink extends AbstractChannelSink {
}
public void run() {
channel.shutdownLock.lock();
while (channel.isBound()) {
try {
Socket acceptedSocket = channel.socket.accept();
@ -238,6 +248,7 @@ class OioServerSocketPipelineSink extends AbstractChannelSink {
}
}
}
channel.shutdownLock.unlock();
}
}
}