SSIS 包甚至没有启动，SQLAgent 几乎立即返回错误。
它发生过一次，该作业计划每天运行近一年，直到现在它没有任何问题。凭证、数据结构没有改变（我们正在迁移到另一个域，但它不会影响使用相同代理的其他作业）。
SQLAgent 返回的错误：
Executed as user: <SSIS_PROXY>. Microsoft (R) SQL Server Execute Package Utility
Version 12.0.4100.1 for 64-bit
Copyright (C) Microsoft Corporation. All rights reserved.
Started: <TIME> Failed to execute IS server package because of error 0x80131904.
Server: <SERVER>,
Package path: <PATH>, Environment reference Id: NULL.
Description: Timeout expired.
The timeout period elapsed prior to completion of the operation
or the server is not responding.
Source: .Net SqlClient Data Provider Started: <TIME>
Finished: <TIME> Elapsed: …