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AbstractBootstrap can crash instead of failing promise, close #5387

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Motivation:
When `ChannelFactory#newChannel` crashed, `AbstractBootstrap#initAndRegister` propagates the exception to the caller instead of failing the promise.

Modifications:
- Catch exceptions from `ChannelFactory#newChannel`.
- Notify promise of such failure.

Result:
`AbstractBootstrap` gracefully handles connect failures.
This commit is contained in:
Stephane Landelle 2016-06-13 15:09:05 +02:00 committed by Norman Maurer
parent a7496ed83d
commit 9bfeab2c8a
2 changed files with 28 additions and 6 deletions
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6
transport/src/main/java/io/netty/bootstrap/AbstractBootstrap.java
View File

@ -314,11 +314,15 @@ public abstract class AbstractBootstrap<B extends AbstractBootstrap<B, C>, C ext
}
final ChannelFuture initAndRegister() {
final Channel channel = channelFactory.newChannel();
Channel channel = null;
try {
channel = channelFactory.newChannel();
init(channel);
} catch (Throwable t) {
if (channel != null) {
// channel can be null if newChannel crashed (eg SocketException("too many open files"))
channel.unsafe().closeForcibly();
}
// as the Channel is not registered yet we need to force the usage of the GlobalEventExecutor
return new DefaultChannelPromise(channel, GlobalEventExecutor.INSTANCE).setFailure(t);
}

26
transport/src/test/java/io/netty/bootstrap/BootstrapTest.java
View File

@ -69,7 +69,6 @@ public class BootstrapTest {
@Test(timeout = 10000)
public void testBindDeadLock() throws Exception {
final Bootstrap bootstrapA = new Bootstrap();
bootstrapA.group(groupA);
bootstrapA.channel(LocalChannel.class);
@ -106,7 +105,6 @@ public class BootstrapTest {
@Test(timeout = 10000)
public void testConnectDeadLock() throws Exception {
final Bootstrap bootstrapA = new Bootstrap();
bootstrapA.group(groupA);
bootstrapA.channel(LocalChannel.class);
@ -234,7 +232,6 @@ public class BootstrapTest {
@Test
public void testAsyncResolutionSuccess() throws Exception {
final Bootstrap bootstrapA = new Bootstrap();
bootstrapA.group(groupA);
bootstrapA.channel(LocalChannel.class);
@ -253,7 +250,6 @@ public class BootstrapTest {
@Test
public void testAsyncResolutionFailure() throws Exception {
final Bootstrap bootstrapA = new Bootstrap();
bootstrapA.group(groupA);
bootstrapA.channel(LocalChannel.class);
@ -275,6 +271,28 @@ public class BootstrapTest {
assertThat(connectFuture.channel().isOpen(), is(false));
}
@Test
public void testChannelFactoryFailureNotifiesPromise() throws Exception {
final RuntimeException exception = new RuntimeException("newChannel crash");
final Bootstrap bootstrap = new Bootstrap()
.handler(dummyHandler)
.group(groupA)
.channelFactory(new ChannelFactory<Channel>() {
@Override
public Channel newChannel() {
throw exception;
}
});
ChannelFuture connectFuture = bootstrap.connect(LocalAddress.ANY);
// Should fail with the RuntimeException.
assertThat(connectFuture.await(10000), is(true));
assertThat(connectFuture.cause(), sameInstance((Throwable) exception));
assertThat(connectFuture.channel(), is(nullValue()));
}
private static final class DelayedEventLoopGroup extends DefaultEventLoop {
@Override
public ChannelFuture register(final Channel channel, final ChannelPromise promise) {