Azure通知中心java.net.ConnectException：连接超时：没有进一步的信息

Question

正尝试通过Java使用Azure通知中心。当试图创建注册时，我得到一个java.net.ConnectException：连接超时：没有进一步的信息。有人能帮我理解为什么会出现这个问题吗？请让我知道你是否需要更多信息。谢谢。

我使用的代码是https://github.com/Azure/azure-notificationhubs-java-backend/blob/master/NotificationHubs。

Jar文件版本如下：

httpclient - 4.3.1 
httpcore - 4.3.1 
httpcore-nio - 4.3.1 

错误发生在SyncCallback类，方法 - “失败”。异常跟踪如下。

java.lang.RuntimeException: java.net.ConnectException: Connection timed out: no further information 
    at com.org.utils.notifications.SyncCallback.failed(SyncCallback.java:41) 
    at org.apache.http.concurrent.BasicFuture.failed(BasicFuture.java:130) 
    at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.connectionRequestFailed(DefaultClientExchangeHandlerImpl.java:318) 
    at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.access$100(DefaultClientExchangeHandlerImpl.java:63) 
    at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl$1.failed(DefaultClientExchangeHandlerImpl.java:364) 
    at org.apache.http.concurrent.BasicFuture.failed(BasicFuture.java:130) 
    at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager$InternalPoolEntryCallback.failed(PoolingNHttpClientConnectionManager.java:474) 
    at org.apache.http.concurrent.BasicFuture.failed(BasicFuture.java:130) 
    at org.apache.http.nio.pool.RouteSpecificPool.failed(RouteSpecificPool.java:165) 
    at org.apache.http.nio.pool.AbstractNIOConnPool.requestFailed(AbstractNIOConnPool.java:530) 
    at org.apache.http.nio.pool.AbstractNIOConnPool$InternalSessionRequestCallback.failed(AbstractNIOConnPool.java:778) 
    at org.apache.http.impl.nio.reactor.SessionRequestImpl.failed(SessionRequestImpl.java:154) 
    at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEvent(DefaultConnectingIOReactor.java:175) 
    at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEvents(DefaultConnectingIOReactor.java:147) 
    at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute(AbstractMultiworkerIOReactor.java:349) 
    at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.execute(PoolingNHttpClientConnectionManager.java:189) 
    at org.apache.http.impl.nio.client.CloseableHttpAsyncClientBase.doExecute(CloseableHttpAsyncClientBase.java:67) 
    at org.apache.http.impl.nio.client.CloseableHttpAsyncClientBase.access$000(CloseableHttpAsyncClientBase.java:38) 
    at org.apache.http.impl.nio.client.CloseableHttpAsyncClientBase$1.run(CloseableHttpAsyncClientBase.java:57) 
    at java.lang.Thread.run(Unknown Source) 
Caused by: java.net.ConnectException: Connection timed out: no further information 
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) 
    at sun.nio.ch.SocketChannelImpl.finishConnect(Unknown Source) 
    at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEvent(DefaultConnectingIOReactor.java:173) 
    ... 7 more 

Answer 1

你可以找到这个java.net.ConnectException: Connection timed out的一些共鸣例外。您的系统端口的

1. 防火墙响了，你正在使用到项目中。 检查您的filewale设置并取消阻止端口。

2. IP /域或端口不正确。 尝试使用ping或telnet命令来检查连接性。

3. 可能是由于互联网速度慢或havy过程服务器不在时间段内处理请求，或者可能是连接问题。