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我已经在 gcm_demo 页面上成功注册了我的设备,消息类似于“1 个设备已注册!”。

但是当我点击页面上的发送消息时,它最终变成了这样:

HTTP Status 500 - Could not send message after 6 attempts
type Exception report
message Could not send message after 6 attempts
description The server encountered an internal error that prevented it from fulfilling this request.

例外

java.io.IOException: Could not send message after 6 attempts
    com.google.android.gcm.server.Sender.send(Sender.java:136)
    com.google.android.gcm.demo.server.SendAllMessagesServlet.doPost(SendAllMessagesServlet.java:83)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
4

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