Getting 502 from selfhosted applications via caddy reverse proxy
reddit / selfhosted

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darkalimdor18 · 2023-11-02 12:25

hello everyone, i just want to ask everyone's take on my error wherein
i am getting 502 responses from my self hosted website application
when i access them, but when i refresh it after a couple of seconds,
it now does load.

so i have a trillium notebook and a filebrowser self hosted on my vps
server via docker. i then have caddy as a reverse proxy to handle the
requests to those applications. so when i visit
trillium\[dot\]mydomain\[dot\]com, i go to my trillium notebook and
when i visit filebrowser\[dot\]mydomain\[dot\]com, i go to my
filebrowser application

so there are times that my website applications suddenly just doesnt
load and i get a 502 error. i checked my vps and my vps is up and
running with no issues. i also have checked if caddy is running
properly in the logs and i do not see any errors

upon googling i did not find and compelling reasons but one reason im
suspecting is that

i have 1gb of swap memory set in my vps so im thinking that the
applications hosted in docker are being put into swap memory since i
do not access them very frequently, so when i access them some time in
the future, the vps needs to load the application from swap memory
instead of directly loading it from RAM, which causes the application
to return 502 first and then when refreshing after a few seconds, the
application loads... is this possible?