我有以下课程：
public class TCPHandler extends IoHandlerAdapter{
static AtomicInteger sessions = new AtomicInteger();
@Override
public void exceptionCaught(final IoSession session, final Throwable cause) throws Exception {
cause.printStackTrace();
//System.out.println(session.isConnected()); //true
//System.out.println(session.isClosing()); //false
session.close(true).addListener(new IoFutureListener<CloseFuture>() { //immediately!
@Override
public void operationComplete(final CloseFuture future) {
System.out.println("TCP! " + sessions.decrementAndGet()); //Never happens! :(
}
});
//System.out.println(session.isConnected()); //true
//System.out.println(session.isClosing()); //true
}
@Override
public void sessionIdle(final IoSession session, final IdleStatus status) throws Exception {
System.out.println("TCP " + session + " " + status + " " + session.getIdleCount(status));
@Override
public void sessionOpened(final IoSession session) throws Exception {
System.out.println("TCP " + sessions.incrementAndGet());
}
@Override
public void sessionClosed(final IoSession session) throws Exception {
System.out.println("TCP " + sessions.decrementAndGet());
}
}
当我使用jMeter使用 100 个线程对我的应用程序进行基准测试并停止基准测试时，我得到以下输出：
TCP 1
TCP 2
TCP 3
...
...
TCP 75
TCP 74
TCP 73
TCP 72
TCP 71
TCP 70
TCP 69
TCP 68
TCP 67
TCP 66
Caused by: javax.net.ssl.SSLException: Received close_notify during handshake
at sun.security.ssl.Alerts.getSSLException(Alerts.java:208)
at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1646)
at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1614)
at sun.security.ssl.SSLEngineImpl.recvAlert(SSLEngineImpl.java:1756)
at sun.security.ssl.SSLEngineImpl.readRecord(SSLEngineImpl.java:1075)
at sun.security.ssl.SSLEngineImpl.readNetRecord(SSLEngineImpl.java:901)
at sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:775)
at javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:624)
at org.apache.mina.filter.ssl.SslHandler.unwrap(SslHandler.java:748)
at org.apache.mina.filter.ssl.SslHandler.unwrapHandshake(SslHandler.java:683)
at org.apache.mina.filter.ssl.SslHandler.handshake(SslHandler.java:569)
at org.apache.mina.filter.ssl.SslHandler.messageReceived(SslHandler.java:355)
at org.apache.mina.filter.ssl.SslFilter.messageReceived(SslFilter.java:488)
... 15 more
javax.net.ssl.SSLHandshakeException: SSL handshake failed.
at org.apache.mina.filter.ssl.SslFilter.messageReceived(SslFilter.java:507)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:542)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1300(DefaultIoFilterChain.java:48)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:943)
at org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:109)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:542)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:535)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:714)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:668)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:657)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$600(AbstractPollingIoProcessor.java:67)
at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:1121)
at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: javax.net.ssl.SSLException: Received close_notify during handshake
at sun.security.ssl.Alerts.getSSLException(Alerts.java:208)
at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1646)
at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1614)
at sun.security.ssl.SSLEngineImpl.recvAlert(SSLEngineImpl.java:1756)
at sun.security.ssl.SSLEngineImpl.readRecord(SSLEngineImpl.java:1075)
at sun.security.ssl.SSLEngineImpl.readNetRecord(SSLEngineImpl.java:901)
at sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:775)
at javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:624)
at org.apache.mina.filter.ssl.SslHandler.unwrap(SslHandler.java:748)
at org.apache.mina.filter.ssl.SslHandler.unwrapHandshake(SslHandler.java:683)
at org.apache.mina.filter.ssl.SslHandler.handshake(SslHandler.java:569)
at org.apache.mina.filter.ssl.SslHandler.messageReceived(SslHandler.java:355)
at org.apache.mina.filter.ssl.SslFilter.messageReceived(SslFilter.java:488)
... 15 more
(0x0000006A: nio socket, server, /127.0.0.1:37867 => /127.0.0.1:10001) SSL handshake failed.
(0x00000066: nio socket, server, /127.0.0.1:37863 => /127.0.0.1:10001) SSL handshake failed.
javax.net.ssl.SSLHandshakeException: SSL handshake failed.
at org.apache.mina.filter.ssl.SslFilter.messageReceived(SslFilter.java:507)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:542)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1300(DefaultIoFilterChain.java:48)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:943)
at org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapter.java:109)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:542)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:535)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:714)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:668)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:657)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$600(AbstractPollingIoProcessor.java:67)
at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:1121)
at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: javax.net.ssl.SSLException: Received close_notify during handshake
at sun.security.ssl.Alerts.getSSLException(Alerts.java:208)
at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1646)
at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1614)
at sun.security.ssl.SSLEngineImpl.recvAlert(SSLEngineImpl.java:1756)
at sun.security.ssl.SSLEngineImpl.readRecord(SSLEngineImpl.java:1075)
at sun.security.ssl.SSLEngineImpl.readNetRecord(SSLEngineImpl.java:901)
at sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:775)
at javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:624)
at org.apache.mina.filter.ssl.SslHandler.unwrap(SslHandler.java:748)
at org.apache.mina.filter.ssl.SslHandler.unwrapHandshake(SslHandler.java:683)
at org.apache.mina.filter.ssl.SslHandler.handshake(SslHandler.java:569)
at org.apache.mina.filter.ssl.SslHandler.messageReceived(SslHandler.java:355)
at org.apache.mina.filter.ssl.SslFilter.messageReceived(SslFilter.java:488)
... 15 more
(0x0000004F: nio socket, server, /127.0.0.1:37842 => /127.0.0.1:10001) SSL handshake failed.
TCP 65
TCP 64
TCP 63
TCP 62
TCP 61
TCP 60
TCP 59
TCP 58
TCP 57
TCP 56
TCP 55
这意味着（如果我的代码是正确的）还有 55 个未关闭的会话！在几个停止的基准测试之后，应用程序停止响应，因为打开的文件描述符（套接字）太多。
所以我的问题是，为什么侦听器中的operationComplete方法close()从未被调用，那么，为什么close()永远不会完成并且套接字永远不会关闭？