sunzhanyi
commented
7 years ago 经过对openresty各版本的比对，我发现api ngx_http_lua_ffi_sema_new的引入是从当前最新版本openresty-1.9.15.1开始的，所以没有发现，看来我的锅轻一点了 :)
解决这个问题的终极办法是，如果想用semaphore的话，每次使用lua-resty-core的时候，需要将lua-resty-core/lib/ngx 和 lua-resty-core/lib/resty 的版本与openresty保持一直，简单粗暴的方法就是，从/usr/local/oprensty/lualib中将ngx和resty目录 copy 到ABTestingGateway的lib/lua-resty-core目录下替换；
解决这个问题的终极办法是，如果想用semaphore的话，每次使用lua-resty-core的时候，需要将lua-resty-core/lib/ngx 和 lua-resty-core/lib/resty 的版本与openresty保持一直，简单粗暴的方法就是，从/usr/local/oprensty/lualib中将ngx和resty目录 copy 到ABTestingGateway的lib/lua-resty-core目录下替换；
我之所以没有将lua_package_path中的路径直接指定到openresty的路径下，原因是1、我们使用的tengine，所以lua-resty-core等lib需要从目录外指定；2、运维人员应该拥有自己指定lib路径的权力。
这样的话，我仍然将本repo中的lib-resty-core保持原状，然后在readme中说明吧。
sleevefone
openresty -V nginx version: openresty/1.11.2.5 built by gcc 4.4.7 20120313 (Red Hat 4.4.7-18) (GCC) built with OpenSSL 1.0.2k 26 Jan 2017 TLS SNI support enabled configure arguments: --prefix=/usr/local/openresty/nginx --with-cc-opt='-O2 -I/usr/local/openresty/zlib/include -I/usr/local/openresty/pcre/include -I/usr/local/openresty/openssl/include' --add-module=../ngx_devel_kit-0.3.0 --add-module=../echo-nginx-module-0.61 --add-module=../xss-nginx-module-0.05 --add-module=../ngx_coolkit-0.2rc3 --add-module=../set-misc-nginx-module-0.31 --add-module=../form-input-nginx-module-0.12 --add-module=../encrypted-session-nginx-module-0.06 --add-module=../srcache-nginx-module-0.31 --add-module=../ngx_lua-0.10.10 --add-module=../ngx_lua_upstream-0.07 --add-module=../headers-more-nginx-module-0.32 --add-module=../array-var-nginx-module-0.05 --add-module=../memc-nginx-module-0.18 --add-module=../redis2-nginx-module-0.14 --add-module=../redis-nginx-module-0.3.7 --with-ld-opt='-Wl,-rpath,/usr/local/openresty/luajit/lib -L/usr/local/openresty/zlib/lib -L/usr/local/openresty/pcre/lib -L/usr/local/openresty/openssl/lib -Wl,-rpath,/usr/local/openresty/zlib/lib:/usr/local/openresty/pcre/lib:/usr/local/openresty/openssl/lib' --with-pcre-jit --with-ipv6 --with-stream --with-stream_ssl_module --with-http_v2_module --without-mail_pop3_module --without-mail_imap_module --without-mail_smtp_module --with-http_stub_status_module --with-http_realip_module --with-http_addition_module --with-http_auth_request_module --with-http_secure_link_module --with-http_random_index_module --with-http_gzip_static_module --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-threads --with-file-aio --with-dtrace-probes --with-http_ssl_module
请求：curl 127.0.0.1:8030 -H 'X-Uid:30' -H 'X-Real-IP:192.168.1.1' 报错：
500 Internal Server Error
错误日志： 2017/09/13 12:51:56 [error] 19730#19730: 1 lua entry thread aborted: runtime error: ../lib/lua-resty-core/lib/ngx/semaphore.lua:64: /usr/local/openresty/luajit/lib/libluajit-5.1.so.2: undefined symbol: ngx_http_lua_ffi_semaphore_new stack traceback: coroutine 0: [C]: in function 'require' /opt/ABTestingGateway/utils/../diversion/diversion.lua:11: in function </opt/ABTestingGateway/utils/../diversion/diversion.lua:1>, client: 127.0.0.1, server: api.weibo.cn, request: "GET / HTTP/1.1", host: "127.0.0.1:8030" 2017/09/13 12:58:02 [error] 20445#20445: 1 lua entry thread aborted: runtime error: ../lib/lua-resty-core/lib/ngx/semaphore.lua:64: /usr/local/openresty/luajit/lib/libluajit-5.1.so.2: undefined symbol: ngx_http_lua_ffi_semaphore_new stack traceback: coroutine 0: [C]: in function 'require' /opt/ABTestingGateway/utils/../diversion/diversion.lua:11: in function </opt/ABTestingGateway/utils/../diversion/diversion.lua:1>, client: 127.0.0.1, server: api.weibo.cn, request: "GET / HTTP/1.1", host: "127.0.0.1:8030"