[GitHub] [apisix] yxudong commented on issue #4301: bug: skywalking not work when upsteam timeout

[GitBox <gi...@apache.org>]

yxudong commented on issue #4301:
URL: https://github.com/apache/apisix/issues/4301#issuecomment-847480765


   The specific case is here.
   
   > location = /test {
   >     rewrite_by_lua_block {
   >         skywalking_tracer:start("upstream service")
   >     }
   > 
   >     proxy_pass http://test_upsteam;
   >     proxy_connect_timeout 1;
   >     proxy_send_timeout 1;
   >     proxy_read_timeout 1;
   > 
   >     body_filter_by_lua_block {
   >         if ngx.arg[2] then
   >             skywalking_tracer:finish()
   >         end
   >     }
   > 
   >     log_by_lua_block {
   >         skywalking_tracer:prepareForReport()
   >     }
   > }
   
   The proxy_read_timeout config is 1s.
   When http://test_upsteam reponse time more than that, nginx will has error log
   
   > upstream timed out (110: Connection timed out) while reading response header from upstream, xxxxxxxxxx
   
   In this case, the http request will not execute body_filter_by_lua phase, and `sw_tracer:finish` function is not be called also.


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