Question

在高负载环境中测试运行apache2和mono 2.8.2的ubuntu服务器时，大约每十分钟一次，它会输出以下错误（最后两行错误行重复约一百次）。

Handling exception type ArgumentOutOfRangeException
Message is Non-negative number required.
Parameter name: srcOffset
IsTerminating is set to True
System.ArgumentOutOfRangeException: Non-negative number required.
Parameter name: srcOffset
  at System.Buffer.BlockCopy (System.Array src, Int32 srcOffset, System.Array dst, Int32 dstOffset, Int32 count) [0x000b7] in /home/elliott/mono-2.8.2/mcs/class/corlib/System/Buffer.cs:103
  at System.Net.WebConnectionStream.ReadAll () [0x00183] in /home/elliott/mono-2.8.2/mcs/class/System/System.Net/WebConnectionStream.cs:259
  at System.Net.WebConnectionStream.CheckResponseInBuffer () [0x0002f] in /home/elliott/mono-2.8.2/mcs/class/System/System.Net/WebConnectionStream.cs:120
  at (wrapper remoting-invoke-with-check) System.Net.WebConnectionStream:CheckResponseInBuffer ()
  at System.Net.WebConnection.ReadDone (IAsyncResult result) [0x001a3] in /home/elliott/mono-2.8.2/mcs/class/System/System.Net/WebConnection.cs:476
  at System.Net.Sockets.Socket+SocketAsyncResult.CB (System.Object unused) [0x00000] in /home/elliott/mono-2.8.2/mcs/class/System/System.Net.Sockets/Socket.cs:214
[Tue Mar 08 13:49:58 2011] [error] (70014)End of file found: read_data failed
[Tue Mar 08 13:49:58 2011] [error] Command stream corrupted, last command was 1
[Tue Mar 08 13:49:58 2011] [error] (70014)End of file found: read_data failed
[Tue Mar 08 13:49:58 2011] [error] Command stream corrupted, last command was 1

这会在我的代码中某处出现问题，还是mod_mono本身存在问题？它似乎是在服务器上放置更高的负载之后出现的，并且我的任何源代码文件都没有参考行号。

另外需要注意的是，升级到单声道2.10.1之后，在小测试中我反而每次请求都会出现此错误（但我无法测试任何大规模负载）：

[Mon Mar 14 12:59:30 2011] [error] (70014)End of file found: read_data failed
[Mon Mar 14 12:59:30 2011] [error] Command stream corrupted, last command was -1

Answer 1

这看起来像System.Net.WebConnectionStream.ReadAll中的一个错误。不知怎的，我怀疑readBufferOffset已变为否定，虽然不明显如何......（当然，自2.8.2以来这可能已经修复了......）Buffer.BlockCopy的参数验证代码很漂亮直截了当...

Answer 2

我可能已经在git pull修正了这个问题，该问题已于2012年3月1日致力于Mono。不幸的是，这意味着它不是单声道2.10.8.1（由于单声道3仍处于测试阶段，许多发行版目前处于单声道）。

单声道2.8.2 System.buffer.blockcopy错误

2 个答案: