Docker log output not visible until tentris_server is shut down

[KonradHoeffner]

With the following command I do not see any log messages until the server is shut down.

$ docker run -v /tmp/log:/tentris -v ./anno:/datasets --publish=9080:9080 dicegroup/tentris_server --loglevel trace --logstdout -f /datasets/annods2309.ttl

Maybe there needs to be a flush to the logs somewhere in the code?

Output after hitting CTRL+C:

1 | 2023-09-20 09:46:30.443732 | 0x00000000016aa580 | info | Running tentris 1.0.7 with hypertrie 0.5.3
2 | 2023-09-20 09:46:30.443803 | 0x00000000016aa580 | info | time: 2023-09-20_09:46:30
3 | 2023-09-20 09:46:30.443811 | 0x00000000016aa580 | info | Mem: 8984 kB
4 | 2023-09-20 09:46:30.443817 | 0x00000000016aa580 | info | nt-file: /datasets/annods2309.ttl loading ...
5 | 2023-09-20 09:46:30.495563 | 0x00000000016aa580 | info |     0.0284 mio triples processed.
6 | 2023-09-20 09:46:30.495583 | 0x00000000016aa580 | info |     0.0284 mio triples loaded.
7 | 2023-09-20 09:46:30.495613 | 0x00000000016aa580 | info | time: 2023-09-20_09:46:30
8 | 2023-09-20 09:46:30.495616 | 0x00000000016aa580 | info | Mem: 37076 kB
9 | 2023-09-20 09:46:30.495619 | 0x00000000016aa580 | info | duration: 0 h 0 min 0.051 s = 51 ms
10 | 2023-09-20 09:46:30.495796 | 0x00000000016aa580 | info | SPARQL endpoint serving sparkling linked data treasures on 24 threads at http://0.0.0.0:9080/sparql?query=
11 | 2023-09-20 09:47:42.483352 | 0x00000000016aa580 | info | Shutdown successful.