我们的 EC2 实例 (Windows Server 2008) 在过去 3 个月内多次崩溃（最后一次是今天 1:05 EST）。在检查 MEMORY.DMP 文件后，我们注意到崩溃的可能原因是 rhelnet.sys（RedHat PV NIC 驱动程序）。
崩溃发生后，服务器的事件查看器有以下记录：
Critical - Kernel Power:
The system has rebooted without cleanly shutting down first.
This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
BugCheck:
The computer has rebooted from a bugcheck. The bugcheck was:
0x000000d1 (0x000000000000002d, 0x0000000000000002, 0x0000000000000000, 0xfffff88001402d14).
A dump was saved in: C:\Windows\MEMORY.DMP. Report Id: 100113-35849-01.
这可能是硬件问题吗？如果我们停止并启动实例会有帮助吗？或者这更可能是由系统上运行的软件引起的？
[2013 年 1 月 10 日更新]
Amazon 代表建议在我们的实例上将 RH 驱动程序更新为 Citrix PV 驱动程序：
[2013 年 8 月 10 日更新]
我们对克隆的实例执行了驱动程序升级。升级后，我们在事件查看器中注意到以下错误：
Xennet6 errors in Event Viewer (Event ID# 5001)
经过进一步挖掘，我发现这文章建议安装最新的 Citrix 驱动程序。不幸的是，这根本没有帮助，我们的克隆实例变得无响应。
[2013.08.10更新 2]
我重新创建了一个实例并再次更新了 PV 驱动程序。在网上搜索后，我发现这亚马逊销售代表在文章中解释说：
"Event ID 5001 from source Xennet6 cannot be found" message does not
indicate anything wrong, just that the PV driver is looking for a feature
that we have not implemented in our version of Xen.
我会让测试系统运行一段时间，看看是否存在任何问题。
答案1
按照亚马逊代表的建议升级驱动程序解决了该问题。
关于这个Event ID 5001...问题，以下是我从亚马逊得到的答复：
Please ignore the Xennet 5001 error. This error occurs on every instance
that is launched with Citrix PV drivers and is due to the driver looking
for a feature that is not supported on EC2. It will have no other effect on the instance.
答案2
我遇到了同样的问题。
但是 AWS Supporter 给我的回答如下：他们不确定 Citrix PV 驱动器是否存在问题。
Currently, we are unable to root cause the issue.
In my personal opinion, this might be a one-time only occurrence,
but as you are running Citrix PV Drivers, I highly encourage you to upgrade.
As the Citrix drivers show up in the logs,
they might had been related to the issue.