Azure notification hub java.net.ConnectException: Connection timed out: no further information

Question

am trying to use Azure notification hub, via Java. When trying to do create registration, I get a java.net.ConnectException: Connection timed out: no further information. Can someone help me understand why this issue may come? Pls let me know if you need more information. Thanks.

Am using the code found from https://github.com/Azure/azure-notificationhubs-java-backend/blob/master/NotificationHubs.

Jar file versions are as below:

httpclient - 4.3.1
httpcore - 4.3.1
httpcore-nio - 4.3.1

Error happens in SyncCallback class, method - "failed". Exception trace is as below.

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

you can find the some resone of this java.net.ConnectException: Connection timed out Exception.

1. firewall of your system port rang which you are using into your project. check your filewale setting and unblock the port.

2. IP/domain or port is incorrect. try to ping or telnet command to check connectivity.

3. may be due to slow internet or havy process server are not processes the request in time period, or may b connection issue.