NBXplorer.Indexer.BTC: Unhandled exception in the indexer, retrying in 10 seconds (no lightning apps; RTL)

[bartbrand]

I initially installed CLN, but couldn't start RTL nor Spark. Than I switched to LND, but the identical errors occurred.

The dashboard is loading properly. I did make an on chain transaction which went fine.

The problem is with the lightning services.

Here are the log files that show what might be going wrong:

I still prefer to run BTCPay with CLN (so I still need to switch back from LND -> CLN)

Looking forward to your help in resolving the error with NBXplorer first before I switch back to CLN. Thanks a million for looking into this!

[NicolasDorier]

So RTL and lightning apps doesn't rely on NBX. The NBX exception doesn't seem really important as it reconnects shortly after, as it seems the on-chain wallet of btcpay works for you.

[NicolasDorier]

Concerning lightning, do you confirm that LND is acting as it should? You seem to have access to RTL.
For c-lightning, I need to update soon the container version, but I can't until they fix ElementsProject/lightning#5657

[bartbrand]

No, RTL is not acting as it should.

Although the RTL icon is there, I do get a re-direct: 404 page not found error (when I click the icon).

That actually is the core of my problem.

[NicolasDorier]

@bartbrand first, let's focus on fixing RTL for LND.
Can you try to click on click here on this page https://<youserver>/server/services/rtl/BTC, does it work?

[bartbrand]

I can go to the link, but it will result in the same 404 error as clicking on the icon from the lighting services page with the RTL icon.

[NicolasDorier]

@bartbrand can you screenshot me the 404 error that you see?

[NicolasDorier]

Also are you running any kind of reverse proxy between the server and internet?

[bartbrand]

Yes, I am running nginx.

[NicolasDorier]

@bartbrand can you give me the configuration of your btcpay server? cat $BTCPAY_ENV_FILE check there isn't any password there as well.

Problem is probably coming from your reverse proxy not routing properly. Please also show me a screenshot of the 404 page.

[bartbrand]

Yes, I am running nginx.

[bartbrand]

and this is the 404 screen when I hit the RTL button ...

[bartbrand]

@NicolasDorier how do you suggest I proceed with this issue?

[NicolasDorier]

@bartbrand can you ping me directly on https://chat.btcpayserver.org/ ?
This is weird you have this problem. What should happen is that our nginx should redirect the request not to BTCPay but to RTL.

Can you try docker restart nginx-gen, and if it doesn't work I'll need to debug that more interactively with you on the chat.

[NicolasDorier]

For example, the nginx config that you should find at docker exec nginx cat /etc/nginx/conf.d/default.conf should include this line

        location /rtl/ {
                proxy_pass http://bitcoin_rtl:3000/rtl/;
        }

[bartbrand]

docker restart nginx-gen didn´t work ...

[NicolasDorier]

@bartbrand got it.
It is because you probably removed the nginx of btcpay-docker because you wanted to use your own

cat /etc/profile.d/btcpay-env.sh should show me this.

If that's the case, then it's normal you have a 404, it is this nginx that is responsible to route the http request to the proper container.

If you want to use your own reverse proxy, you need to follow this https://docs.btcpayserver.org/FAQ/Deployment/#can-i-use-an-existing-nginx-server-as-a-reverse-proxy-with-ssl-termination

[bartbrand]

@NicolasDorier
I will give the tutorial you revered to a try.

This is how my nginx is set up now:

[NicolasDorier]

you excluded the nginx fragment, so it's normal it doesn't work. Our reverse proxy is handling routing.

If you just want to offload https termination, see https://docs.btcpayserver.org/FAQ/Deployment/#can-i-use-an-existing-nginx-server-as-a-reverse-proxy-with-ssl-termination