nginx error.log显示这个错误

[893271511]

2016/01/26 10:32:04 [notice] 500577#0: 101 "/([a-zA-Z0-9]+)/([a-zA-Z0-9]+)/([a-zA-Z0-9]+)/([a-zA-Z0-9]+)/(.)" matches "/group1/M00/00/00/CgQbTlal2hmAU9viAAUBXOkTyek689.jpg", client: 10.4.4.4:444, server: localhost, request: "GET /group1/M00/00/00/CgQbTlal2hmAU9viAAUBXOkTyek689.jpg HTTP/1.1", host: "10.4.4.4:444"
2016/01/26 10:32:04 [error] 500577#0: *101 lua entry thread aborted: runtime error: /usr/local/nginx-1.8.0/conf/lua/restyfastdfs.lua:61: attempt to index upvalue 'bit' (a nil value)
stack traceback:
coroutine 0:
/usr/local/nginx-1.8.0/conf/lua/restyfastdfs.lua:61: in function 'int2buf'
/usr/local/nginx-1.8.0/conf/lua/restyfastdfs.lua:471: in function 'query_download_storage_ex'
/usr/local/nginx-1.8.0/conf/lua/restyfastdfs.lua:462: in function 'query_download_storage'
/usr/local/nginx-1.8.0/conf/lua/restyfastdfs.lua:513: in function 'do_download'
/usr/local/nginx-1.8.0/conf/lua/fastdfs.lua:50: in function </usr/local/nginx-1.8.0/conf/lua/fastdfs.lua:1>, client: 10.4.4.4, server: localhost, request: "GET /group1/M00/00/00/CgQbTlal2hmAU9viAAUBXOkTyek689.jpg HTTP/1.1", host: "10.4.4.4:444"