我正在初始化bayeux客户端：
SslContextFactory sslContextFactory = new SslContextFactory(true);
HttpClient httpClient = new HttpClient(sslContextFactory);
httpClient.start();
Map<String, Object> options = new HashMap<String, Object>();
ClientTransport transport = new LongPollingTransport(options, httpClient);
BayeuxClient client = new BayeuxClient("https://localhost:8483/cometd/", transport);
client.handshake();
boolean handshaken = client.waitFor(20000, BayeuxClient.State.CONNECTED);
if (!handshaken) {
LOGGER.info("Failed to handshake");
throw new RuntimeException("Failed to handshake");
}
我将其用于与服务器的某些通信，它有效，它订阅了频道，发送，接收，然后我会闲置一段时间。我得到以下例外：
java.util.concurrent.TimeoutException: Idle timeout 20000 ms
at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.onIdleExpired(HttpConnectionOverHTTP.java:145)
at org.eclipse.jetty.io.ssl.SslConnection.onIdleExpired(SslConnection.java:286)
at org.eclipse.jetty.io.AbstractEndPoint.onIdleExpired(AbstractEndPoint.java:401)
at org.eclipse.jetty.io.IdleTimeout.checkIdleTimeout(IdleTimeout.java:166)
at org.eclipse.jetty.io.IdleTimeout$1.run(IdleTimeout.java:50)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
和多次以下时间：
java.nio.channels.ClosedChannelException: null
at org.eclipse.jetty.io.WriteFlusher.onClose(WriteFlusher.java:502)
at org.eclipse.jetty.io.AbstractEndPoint.onClose(AbstractEndPoint.java:353)
at org.eclipse.jetty.io.ChannelEndPoint.onClose(ChannelEndPoint.java:216)
at org.eclipse.jetty.io.AbstractEndPoint.doOnClose(AbstractEndPoint.java:225)
at org.eclipse.jetty.io.AbstractEndPoint.close(AbstractEndPoint.java:192)
at org.eclipse.jetty.io.AbstractEndPoint.close(AbstractEndPoint.java:175)
at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.doClose(SslConnection.java:1132)
at org.eclipse.jetty.io.AbstractEndPoint.doOnClose(AbstractEndPoint.java:220)
at org.eclipse.jetty.io.AbstractEndPoint.close(AbstractEndPoint.java:192)
at org.eclipse.jetty.io.AbstractEndPoint.close(AbstractEndPoint.java:175)
at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.close(HttpConnectionOverHTTP.java:195)
at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.onIdleExpired(HttpConnectionOverHTTP.java:145)
at org.eclipse.jetty.io.ssl.SslConnection.onIdleExpired(SslConnection.java:286)
at org.eclipse.jetty.io.AbstractEndPoint.onIdleExpired(AbstractEndPoint.java:401)
at org.eclipse.jetty.io.IdleTimeout.checkIdleTimeout(IdleTimeout.java:166)
at org.eclipse.jetty.io.IdleTimeout$1.run(IdleTimeout.java:50)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
如果我保持忙碌，它不会失败。我尝试更改httpclient的超时，但这只会延迟问题。为什么Bayeux关闭渠道而不是进行投票？我使用最新版本org.cometd.java 4.0.2。
也要注意的是，我有一个没有问题的JavaScript客户端。
有人可以帮忙吗？
事实证明我正在阻止Cometd线程：
我构建了一个命令行工具来检查服务器，当我收到一条消息（带有Cometd的线程）时，我握住该线程以用于用户输入。如果我握住该线程足够长的时间，则与上述例外断开连接。
解决方案：当您从Cometd收到一条消息时，请不要握住它，使用新线程。
默认心跳由timeout参数在服务器端控制，默认情况下为30秒。这意味着，当系统闲置时，长民意调查每30秒就会发生一次。
您在20秒时已配置了客户端idleTimeout，因为从您的异常堆栈跟踪中很明显。
当系统闲置时，客户将超时连接 heartbeat（长民意调查）会响应，从而导致您看到的错误。
应该足以让您将客户端idleTimeout配置为大于心跳timeout的值，或者 - 等效 - 将心跳timeout设置为比客户端idleTimeout更小的值。