Hi Tim,
I went over the troubleshooting guide, but this doesn't help as I don't get
any content in the browser, so nothing to see. In the apache logs, I can
see, that the host is reached:
"GET / HTTP/1.1" 502 6753
but it hrows an error and the following is displayed in my browser:
The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request
Reason: *Error reading from remote server*
So no way to see any errors in the browser's Developer Tools.
I tried all the suggested steps in the troubleshooting section
I can reach my backend wget -v
"https://<my-backends-server-name>/server/api" and get an answer similar to
the one when calling wget -v "https://api7.dspace.org/server/api";
I did yarn test:rest as suggested in "
1. From [dspace-angular], run yarn test:rest This script will attempt a
basic Node.js connection to the REST API that is configured in your
"config.prod.yml" file and validate the response."
and it went well.
If I stop the app with pm2 and start it with
node ./dist/server/main.js
I get:
Building production app config
Overriding app config with /dspace-ui-deploy/config/config.yml
Overriding app config with /dspace-ui-deploy/config/config.prod.yml
Angular config.json file generated correctly at
/dspace-ui-deploy/dist/browser/assets/config.json
Environment extended with app config
dspace-angular
Version: 7.5.0
Environment: Production
[HPM] Proxy created: / ->
https://<my-backends-server-name>/server/sitemaps
[10:35:15 GMT+0200 (Mitteleuropäische Sommerzeit)] Listening at
http://localhost:4000/
But if I try to reach the site in the browser - same as before.
console where I started main.js shows:
GET / - - ms - -
1 rules skipped due to selector errors:
.custom-file-input:lang(en)~.custom-file-label -> unmatched pseudo-class
:lang
GET /favicon.ico 404 2723.419 ms - -
I get no answer and I get nothing on the console to get a hint what is
wrong.
netstat -taupe | grep 4000
shows
tcp 0 0 localhost:4000 0.0.0.0:* LISTEN
dspace 119606 6143/node
tcp 0 0 localhost:60110 localhost:4000
VERBUNDEN www-data 119839 5984/apache2
tcp 0 0 localhost:4000 localhost:60110
VERBUNDEN dspace 119840 6143/node
I tried the suggestion from Michael. But this doesn't change anything as
the system still knows that localhost is 127.0.0.1
In the output of netstat nothing is changed. I even changed the value in
the apache config. Same.
ipv6 is disabled on the system.
If I try
wget -v "http://localhost:4000";
I get:
--2023-05-10 10:59:16-- http://localhost:4000/
Auflösen des Hostnamens localhost (localhost) … 127.0.0.1, ::1
Verbindungsaufbau zu localhost (localhost)|127.0.0.1|:4000 … verbunden.
HTTP-Anforderung gesendet, auf Antwort wird gewartet … Lesefehler (Die
Wartezeit für die Verbindung ist abgelaufen) beim Vorspann (header).
Erneuter Versuch.
I tried enabling mod_headers and put
RequestHeader set X-Forwarded-Proto https
in the default-ssl.conf of my apache. No change of behavior.
So I am completely stuck.
Kind Regards
Christiane
DSpace Technical Support schrieb am Mittwoch, 10. Mai 2023 um 20:33:06
UTC+2:
Hi Cristiane,
In order to help, we'd need you to look for the underlying error message
when you attempt to access the User Interface (or backend, depending on the
problem). Here's a troubleshooting guide with details on finding the
underlying error:
https://wiki.lyrasis.org/display/DSPACE/Troubleshoot+an+error#Troubleshootanerror-DSpace7.x(orabove)
We also have a list of common installation issues at the bottom of the
install instructions. It's very likely you may be hitting one of these
common problems (but it'd be easier to tell which one after you look for
underlying errors):
https://wiki.lyrasis.org/display/DSDOC7x/Installing+DSpace#InstallingDSpace-CommonInstallationIssues
If you can find more information about the underlying error, it'll be
easier to help.
You also could try initially running the User Interface manually (not in
PM2) just to verify your other configs are correct. That would at least
help ensure you have a correct configuration between the frontend &
backend. This is documented in step 6 of the Installation for the UI.
Tim
On Wednesday, May 10, 2023 at 11:11:57 AM UTC-5 [email protected]
wrote:
Hi there,
I installed dspace-7.5 angular frontend on a different server, than the
backend. It is a ubuntu 22.04 and I did it as outlined in the Installing
the frontend section in <
https://wiki.lyrasis.org/display/DSDOC7x/Installing+DSpace#InstallingDSpace-InstallingtheFrontend(UserInterface)
>
I set up a apache proxy like it says in the documentation. Backend
(server/api) ist reachable.
I set up the config.prod.yml by taking the config.example.yml and changing
the value for
host: api7.dspace.org to the name of the backend server. HAL-Browser
answers at https://backend-server-name/server. So this is not the problem.
I set up pm2 (like stated in the documentation) to get more logs, started
the application and gave https://angular-server-name-as configured in
local.cfg on Backend and apache config on angular-server-name. DNS is
working.
In the browser I get an error after waiting for minutes "The proxy server
received an invalid response from an upstream server.
The proxy server could not handle the request
Reason: *Error reading from remote server"*
and in the pm2 logs this error message shows up.
0|dspace-ui | GET / - - ms - -
0|dspace-ui | 1 rules skipped due to selector errors:
0|dspace-ui | .custom-file-input:lang(en)~.custom-file-label ->
unmatched pseudo-class :lang
Can somebody tell me what is misconfigured? in config.prod.yml language is
set to:
defaultLanguage: en
That is the entry in the original config.example.yml and I didn't changed
it.
Kind regards
Christiane
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