在第4次重试(第5提交)时，消息被SCA中断，并将消息和故障原因一并提交回调用程序，所以在最后的消息重新提交过程中，Pojo2始终不被调用。
On the fourth retry (fifth delivery), the message is interrupted by SCA, and delivered back to the caller with the reason for the failure, so Pojo2 is never invoked during the last message redelivery.
传送重试队列中当前具有的批通知数。启用应用程序时，此计数器会定期进行更新。
The number of current notification batches in the delivery retry queue. This counter is updated periodically when the application is enabled.
安装程序发现计算机中某设备没有响应。请单击“继续”重试。
Setup has found a hardware device on your computer that is not responding. Click Continue to try this device again.
安装程序发现计算机中某设备没有响应。请单击“继续”重试。
Setup has found a hardware device on your computer that is not responding. Click Continue to try this device again.
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