asp.net – AppPool关闭自己

这是我几个月来已经两次出现的问题.基本上我接到一个电话说我们的网站发出HTTP错误503,我看看IIS7管理器并注意到AppPool已经关闭了.我重新启动它,并继续愉快地继续它,直到几个月后它再次发生.

IIS管理器正在处理四个站点,这两个问题都发生在同一站点上.正在使用的.NET Framework版本是v4.0.

查看事件日志,我看到以下内容

Web服务器IIS：

Warning: Event 5011 “A Process serving the application pool ‘foo’ suffered a fatal communication error with the Windows Process Activation Service. The process id was ‘X’ The data field contains the error number.”
– This warning appears 5 times,with 5 difference values for X,this takes place over about a minute 10-15 seconds between each warning.

Error: Event 5002 “Application pool ‘foo’ is being automatically disabled due to a series of failures in the process(es) serving that application pool.”

申请日志：

Error: Event 1000: “Faulting application name: w3wp.exe,version 7.5.7601.17514,time stamp: 0x4ce7afa2.
Faulting module name: clr.dll version 4.0.30319.17929,times tamp: 0x4ffa59b1. Exception codeL 0x0000fd”

Information: Event 1001 “Fault bucket,type 0
Event Name: APPCRASH Response: Not available”

以上两个事件发生在同一时间段内,首先是错误后跟两个信息事件.这种情况会发生五次,并与Web服务器日志中的警告对齐.

如果有人能够澄清发生了什么,那将非常感激.我宁愿不要担心我们的网站会从网上消失,因为应用程序池决定自行关闭.

我知道可以关闭快速失败保护(在一定次数的失败后导致关闭),但我宁愿处理潜在的问题.