一个接收post数据的脚本,最初是用php写了,从来没有报错过,现在出于性能的考虑,改成了ngx lua,多数时候都正常,但有时候会报错:2012/12/17 14:47:07 [error] 10098#0: *922796 lua entry thread aborted: runtime error: ...r/xxx.lua:144: failed to read request body stack traceback:coroutine 0: [C]: in function 'read_body' ...r/xxx.lua:144: in function <...r/xxx.lua:1>, client: 112.96.30.55, server: openbox.mobilem.360.cn, request: "POST /mintf/xxx HTTP/1.1", host: "openbox.mobilem.360.cn" 请问可能是什么原因?