是mod_mono：随机CompilationException错误 [英] mod_mono: Random CompilationException errors

问题描述

在服务器重新启动后，我有时会随机CompilationException象这样的错误：

After a server restart I sometimes get random CompilationException errors like this:

CompilationException: CS0006: Metadata file `/tmp/apache-temp-aspnet-0/ca373c84/assembly/shadow/10cad1cb/02cb7ade_1201ab15_00000001/ZedGraph.dll' could not be found -> HttpException: Single file build failed

和您无法访问应用程序。如果我再重新启动服务器，那么问题就会消失。

and you can't access the application. If I restart the server again then the problem disappears.

这会触发错误的文件可能是我自己的DLL的一个或依赖，像MYSQL.DLL例如

The file that triggers the error can be one of my own dll's or a dependency, like mysql.dll for instance.

我使用单声道2.10.2，CentOS版本5.7（决赛），Apache和是mod_mono上的Linode VPS。

I am using mono 2.10.2, CentOS release 5.7 (Final), Apache and mod_mono on a Linode VPS.

什么可以原因？任何想法

Any idea of what can be the cause?

编辑：由于我的麻烦开始时，我搬到的Linode和他们使用XEN，我发现--with-xen_opt选项= YES，看起来有希望的：
http://mono-project.com/Advanced_Mono_Compile_Options

Since my troubles started when I moved to Linode and they use XEN, I have found the option --with-xen_opt=yes that looks promissing: http://mono-project.com/Advanced_Mono_Compile_Options

推荐答案

听起来像的影子复制和编辑一个bug（竞争条件吗？）。已经有其他人发现之前固定......看到 HTTP ：//grendello.blogspot.com/2007/08/new-modmono-and-xsp-developments.html

Sounds like a bug (race condition?) with the shadow copying and compilation. There have been others found and fixed before... see http://grendello.blogspot.com/2007/08/new-modmono-and-xsp-developments.html

这是一个类似的问题在2006年 HTTP报告：//lists.ximian.com/pipermail/mono-list/2006-March/030970.html

And this is a report of a similar problem in 2006 http://lists.ximian.com/pipermail/mono-list/2006-March/030970.html

而不是重新启动系统，你可以尝试重新启动Apache的。请注意，我发现它可以帮助停止Apache再启动，而不是重新启动。

Rather than rebooting the system, you can try restarting apache. Note, I have found it can help to stop apache and then start, rather than a restart.

您还可以启用是mod_mono控制面板，并从那里重新启动应用程序。在apache配置添加这一点。

You can also enable the mod_mono control panel and restart the application from there. Add this in apache config.

<Location /monocp>
  SetHandler mono-ctrl
  Order deny,allow
  Deny from all
  Allow from 127.0.0.1 <YOURIP>
</Location>

要自动执行此过程看一看 monit的。

To automate this process take a look at Monit.

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