안녕하세요 서버 구성은 윈도우서버에 비트나미 redmine을 설치하였습니다. 그런데 가끔 아래와 같이 Proxy Error가 발생하는데 무슨 이유인지 잘 모르겠습니다. 아래 apache log파일 내용도 같이 올리니 가르침 부탁드립니다.

error.log

[Wed Jul 17 08:54:06.151052 2019] [proxy_http:error] pid 2004:tid 1184A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. : [client 172.x.x.x:63574] AH01102: error reading status line from remote server 127.0.0.1:3002, referer: http://120.x.x.x:8088/projects/mwb2019-7/issues/gantt [Wed Jul 17 08:54:06.151052 2019] [proxy:error] [pid 2004:tid 1184] [client 172.16.9.1:63574] AH00898: Error reading from remote server returned by /projects/mwb2019-7/issues/ganttchart/create, referer: http://120.x.x.x:8088/projects/mwb2019-7/issues/gantt [Wed Jul 17 08:55:05.849278 2019] [proxy_http:error] pid 2004:tid 1164A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. : [client 172.x.x.x:63607] AH01102: error reading status line from remote server 127.0.0.1:3002, referer: http://120.x.x.x:8088/projects/mwb2019-7/issues/gantt [Wed Jul 17 08:55:05.849278 2019] [proxy:error] [pid 2004:tid 1164] [client 172.xx.x.x:63607] AH00898: Error reading from remote server returned by /plugin_assets/ankoalm_ganttchart/javascripts/jquery.js, referer: \