要解決IIS工作進(jìn)程崩潰問題，首先應(yīng)檢查Windows事件查看器中的日誌，查找崩潰發(fā)生時(shí)的錯(cuò)誤信息和故障模塊；其次啟用並審查IIS失敗請(qǐng)求跟蹤，獲取特定條件下請(qǐng)求處理的詳細(xì)過程；如有內(nèi)存轉(zhuǎn)儲(chǔ)文件，可用WinDbg等工具深入分析崩潰時(shí)的調(diào)用堆棧；同時(shí)注意常見的應(yīng)用程序級(jí)問題，如未處理異常、無限循環(huán)、不兼容的.NET版本等；若仍無法定位，可嘗試隔離應(yīng)用池並逐步禁用模塊以排查根源。

IIS worker process crashes can be frustrating, especially when they happen intermittently and take your site offline without warning. The main culprit is usually something in the application code or server configuration causing instability. Let's break down how to understand what's going wrong and what you can do about it.

Check the Windows Event Viewer First

When a crash happens, Windows logs detailed error messages that are often the first clue. You'll typically find entries under Windows Logs > System or Application with sources like IIS-WMSVC , WAS , or Application Error .

• Look for events around the time of the crash
• Pay attention to Event IDs 1000 (application crash) or 5011 (app pool timeout)
• Check if there's a Faulting Module listed — this tells you which DLL or component caused the crash

For example, seeing Faulting module name: clr.dll could indicate a .NET runtime issue, while w3wp.exe itself faulting might point to native code or IIS modules.

Enable and Review IIS Failed Request Tracing

Failed request tracing gives you more context than standard logs by showing what was happening in IIS at the moment of failure. It's especially helpful if the crash only happens under specific conditions.

To set it up:

• Go to IIS Manager → Select your site → Failed Request Tracing
• Set rules based on status codes (like 500) or even all requests if needed
• Once enabled, reproduce the issue and check the XML log files under the inetpub\logs\FailedReqLogFiles directory

These logs show every module involved in processing the request, which helps pinpoint where things went off the rails — whether it's an authentication module, URL rewrite rule, or something else.

Analyze Memory Dumps When Available

If you're getting frequent crashes and have memory dumps being generated (which can be configured via Windows Error Reporting or ADPlus), you can dig deeper into the root cause using tools like WinDbg or DebugDiag .

• Use .dump /ma filename.dmp in WinDbg to load the dump
• Run !analyze -v to get a breakdown of the exception and call stack
• Look for threads that were active at the time of the crash with ~*kb

This level of analysis takes some learning, but it can tell you exactly which function or library was executing when the crash occurred. If you see repeated issues from third-party modules or custom ISAPI extensions, those should be investigated further.

Watch for Common Application-Level Issues

Many crashes come from poorly written code or incompatible libraries. For ASP.NET apps, common triggers include:

• Unhandled exceptions in global.asax or background threads
• Infinite loops or excessive recursion in code
• Using unsafe code or calling native DLLs incorrectly
• Incompatible versions of .NET Framework or side-by-side assembly conflicts

A good practice is to wrap critical sections in try-catch blocks and log any exceptions. Also, avoid doing long-running operations in Application_Start or Session_Start — these run in the context of w3wp.exe and can bring it down if something goes wrong.

If you've gone through these steps and still can't track down the problem, consider isolating the app in its own application pool and gradually disabling modules until the issue stops occurring. That way, you can narrow down the source without having to rewrite everything at once.基本上就這些.

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