lua request hang

location /eads {
default_type application/json;
content_by_lua_file /home/a/share/tengine/lua/rpc_eads.lua;
}

location /rpc_eads/ {
gzip on;
proxy_connect_timeout 200ms; # optional; control backend timeouts
proxy_send_timeout 200ms; # same
proxy_read_timeout 200ms; # same
send_timeout 200ms;
gzip_types text/xml "application/x-javascript; charset=GB2312" application/xxxx;
cluster_info /home/a/share/tengine/conf/cluster.ini gig_mesh_info;
gig_mesh;
}

lua code

local res = ngx.location.capture_multi{{eads_url,{method=ngx.HTTP_GET}}}

问题描述

curl请求eads，lua代码 local res = ngx.location.capture(eads_url) 掉erpc_eads的服务（拓展的nginx module，将http转为rpc），当curl发起请求时居然卡住了，我只有kill curl时，它才能走到下面的程序，这是什么原因导致的？

单独请求curl /rpc_eads/ 有正常内容返回

Reproduce the hang with the shown locations, curl request, and the Lua entry point rpc_eads.lua, comparing ngx.location.capture or capture_multi with a direct request to /rpc_eads/. Trace the request through the eRPC nginx module and determine why the subrequest completes only after curl is killed; done means documenting the cause and a verified resolution.