selamlar,

ubuntu üzerinde apache2 ve nodejs kurulu, site ssl ile çalışıyor. sistem arada 502'ye düşüyor ve yavaş çalışıyor. restart yapınca geliyor, kısa bir süre sonra tekrar gidiyor.

# top komutundaki kaynak tüketimi neredeyse hiç yok.

problem ve çözüm ne olabilir? site conf şöyle:

 ServerAdmin webmaster@dom.com
ServerName dom.com
ServerAlias www.dom.com
DocumentRoot /var/www/html/dom.com

ProxyRequests On
ProxyPass / http:// localhost:3000/
#retry=0 timeout=5
ProxyPassReverse / http:// localhost:3000/
error.log dosyası şöyle:

[Sun Oct 11 12:14:13.421632 2020] [proxy_http:error] [pid 55652] (70007)The timeout specified has expired: [client 91.199.118.212:38142] AH01102: error reading status line from remote server pay.jzsdgg.com:80, referer: pay.jzsdgg.com
[Sun Oct 11 12:14:13.421678 2020] [proxy:error] [pid 55652] [client 91.199.118.212:38142] AH00898: Error reading from remote server returned by http:/pay.jzsdgg.com/, referer: pay.jzsdgg.com
[Sun Oct 11 12:14:13.898374 2020] [proxy:error] [pid 55658] (110)Connection timed out: AH00957: HTTPS: attempt to connect to 103.88.34.220:443 (*) failed

...
[Sun Oct 11 12:14:16.182365 2020] [proxy:error] [pid 55629] [client 91.199.118.212:45547] AH00898: Error reading from remote server returned by http:/pay.jzsdgg.com/, referer: pay.jzsdgg.com
[Sun Oct 11 12:14:16.942426 2020] [proxy_http:error] [pid 55665] (70007)The timeout specified has expired: [client 91.199.118.212:65105] AH01102: error reading status line from remote server pay.jzsdgg.com:80, referer: pay.jzsdgg.com
[Sun Oct 11 12:14:17.934454 2020] [proxy:error] [pid 55669] [client 91.199.118.212:19134] AH00898: Error reading from remote server returned by http:/pay.jzsdgg.com/, referer: pay.jzsdgg.com
[Sun Oct 11 12:14:17.994372 2020] [proxy:error] [pid 55666] (110)Connection timed out: AH00957: HTTPS: attempt to connect to 103.88.34.220:443 (*) failed
# mpstat
idle 99.36 gösteriyor.

Linux 5.4.0-48-generic (newsapost) 10/11/20 _x86_64_ (2 CPU)

12:46:05 CPU %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle
12:46:05     all    0.39    0.01    0.13    0.10    0.00    0.01    0.00    0.00    0.00   99.36