使用smack庫的JAVA中的GCM CCS（XMPP）實現。 與gcm.googleapis.com的連接失敗

Question

我正在嘗試GCM在android客戶端和java中的服務器應用程序之間進行通信。 我正在使用基於XMPP的GCM，因為我需要異步的雙向消息。

在我的客戶端上，1. Google Play服務檢查顯示需要更新。

google play services is out of date. Requires 4242000 but found 3136130

Api級別-17，將AVD與Google API結合使用，Android 4.2.2 Google Play服務修訂版15我該如何解決？

但是我可以成功注冊該設備。

在服務器端，我使用2。我正在使用smack庫3.4.1，我在google docs中使用了示例代碼。 我收到以下錯誤

gcm.googleapis.com:5235 Exception: XMPPError connecting to gcm.googleapis.com:5235.; : remote-server-error(502)
  -- caused by: XMPPError connecting to gcm.googleapis.com:5235.: remote-server-error(502) XMPPError connecting to gcm.googleapis.com:5235.
  -- caused by: java.net.ConnectException: Connection timed out: connect
    at org.jivesoftware.smack.XMPPConnection.connectUsingConfiguration(XMPPConnection.java:592)
    at org.jivesoftware.smack.XMPPConnection.connect(XMPPConnection.java:1010)
    at SmackCcsClient.connect(SmackCcsClient.java:247)
    at SmackCcsClient.main(SmackCcsClient.java:341)
Nested Exception: 
XMPPError connecting to gcm.googleapis.com:5235.: remote-server-error(502) XMPPError connecting to gcm.googleapis.com:5235.
  -- caused by: java.net.ConnectException: Connection timed out: connect
    at org.jivesoftware.smack.XMPPConnection.connectUsingConfiguration(XMPPConnection.java:565)
    at org.jivesoftware.smack.XMPPConnection.connect(XMPPConnection.java:1010)
    at SmackCcsClient.connect(SmackCcsClient.java:247)
    at SmackCcsClient.main(SmackCcsClient.java:341)
Nested Exception: 
java.net.ConnectException: Connection timed out: connect
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(Unknown Source)
    at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.connect(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.<init>(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketFactoryImpl.createSocket(Unknown Source)
    at org.jivesoftware.smack.XMPPConnection.connectUsingConfiguration(XMPPConnection.java:557)
    at org.jivesoftware.smack.XMPPConnection.connect(XMPPConnection.java:1010)
    at SmackCcsClient.connect(SmackCcsClient.java:247)
    at SmackCcsClient.main(SmackCcsClient.java:341)
Exception in thread "main" java.lang.IllegalStateException: Not connected to server.
    at org.jivesoftware.smack.XMPPConnection.sendPacket(XMPPConnection.java:483)
    at SmackCcsClient.send(SmackCcsClient.java:131)
    at SmackCcsClient.main(SmackCcsClient.java:356)

我已經簽署了用於上游消息傳遞的表格。 但審批仍在進行中。 但是連接本身在這里失敗。 我該如何解決。

請幫忙！ 先感謝您！！

Answer 1

ERROR CODE 502表示連接SERVER時出現問題，可能有多種原因，但是一些常見的問題是，

1） FIREWALL PROBLEM ---- [正確配置防火牆]

2）服務器內部錯誤---- [重試后一]