"502 Bad Gateway" error when executing SPARQL queries

[Daniel-Mietchen]

Describe the bug

Running a query on the Portal's SPARQL endpoint https://query.portal.mardi4nfdi.de/ results in 502 errors

Expected behavior

Running SPARQL queries should either work or result in other errors.

To Reproduce

1. Go to https://query.portal.mardi4nfdi.de/#SELECT%20%2a%20WHERE%20%7B%0A%20%3Fa%20%3Fb%20%3Fc%20%0A%7D%0ALIMIT%2010
2. Click on 'Run'
3. See error

Screenshots

Additional context

The problem seems to be generic, affecting the sample queries at https://portal.mardi4nfdi.de/wiki/Portal#Example_queries too.

Checklist for this issue: (Some checks for making sure this issue is completely formulated)

• [x] Assignee has been set for this issue
• [x] All fields of the issue have been filled
• [x] the main MaRDI project has been assigned as project

[physikerwelt]

I had to restart the wdqs-proxy. It somehow had the wrong internal ip of the wdqs.