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# Fallback issues
This page tracks outstanding problems with
=> https://fallback.genenetwork.org/
Note that some issues may be related to produciton (i.e. the same).
# Tags
* type: bug
* assigned: pjotrp
* keywords: systems, fallback, deploy
* status: in progress
* priority: critical
# Tasks
* [X] 502 timeout errors
* [ ] Rqtl2 not working
* [ ] 413 error
* [ ] Monitor service - both systemd and sheepdog
## 502 timeout errors
These should no longer happen. It required relaxing timeouts on nginx and gunicorn.
## Rqtl2/HK/Pairscan not working
URL error on result of
=> https://fallback.genenetwork.org/show_trait?trait_id=5581148&dataset=UMUTAffyExon_0209_RMA
```
GeneNetwork 2.11-rc2 https://fallback.genenetwork.org/run_mapping (10:01AM UTC Mar 22, 2024)
Traceback (most recent call last):
File "/gnu/store/a39cgbdawj9vp24nsz9q25sf9g5vda7c-profile/lib/python3.10/site-packages/requests/models.py", line 434, in prepare_url
scheme, auth, host, port, path, query, fragment = parse_url(url)
File "/gnu/store/a39cgbdawj9vp24nsz9q25sf9g5vda7c-profile/lib/python3.10/site-packages/urllib3/util/url.py", line 397, in parse_url
return six.raise_from(LocationParseError(source_url), None)
File "<string>", line 3, in raise_from
urllib3.exceptions.LocationParseError: Failed to parse: http://localhost:8893api/rqtl/compute
```
The error points out a missing slash in the local URL: http://localhost:8893api/rqtl/compute
Grepping machines we get:
```
gn3-port 8893
("GN3_LOCAL_URL" ,(string-append "http://localhost:" (number->string gn3-port)))
```
On production we set a trailing slash
```
GN3_LOCAL_URL = "http://localhost:8081/"
```
and in the code we mostly see another addition of the slash - except for this particular link. Arguably the slash is not part of the URL prefix (it is part of the path), so I think setting GN3_LOCAL_URL without the trailing slash is preferred. See also
=> https://en.wikipedia.org/wiki/URL
# R/qtl JSONDecodeError
After adding the slash to GN3 URLs (see above) led to the next error:
```
simplejson.errors.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
```
This looks similar to the earlier documented
=> ../rqtl-mapping-throws-JSONDecodeError
suggesting a missing path for R. In the container log GN3 actually gives the error
```
2024-03-24 08:02:24 return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
2024-03-24 08:02:24 File "/gnu/store/yi76sybwqql4ky60yahv91z57srb2fr0-profile/lib/python3.10/site-packages/gn3/api/rqtl.py", line 25, in compute
2024-03-24 08:02:24 raise FileNotFoundError
2024-03-24 08:02:24 FileNotFoundError
```
Now two things are bad here becuase there is no context other than the error lines! For FileNotFound pass in the filename as suggested here:
=> https://stackoverflow.com/questions/36077266/how-do-i-raise-a-filenotfounderror-properly
Patched in
=> https://github.com/genenetwork/genenetwork3/commit/b615df8c65d4fb6c8f08cf653e920c360c136552
That should help clarify the missing path or file.
```
File "/export/source/fallback-debug/genenetwork3/gn3/fs_helpers.py", line 21, in assert_paths_exist
raise FileNotFoundError(errno.ENOENT, os.strerror(errno.ENOENT), path)
FileNotFoundError: [Errno 2] No such file or directory: '/tmp/gn2/83f0831af5911ab6dc62cbbd37d13741.csv'
```
So, GN2 is miscommunicating the path to GN3.
This also led to documenting how one should test GN2 and GN3 in a running VM:
=> /topics/guix/guix-system-containers-and-how-we-use-them.gmi
## QTLReaper showing font problem
Try HK on
=> https://fallback.genenetwork.org/show_trait?trait_id=5581148&dataset=UMUTAffyExon_0209_RMA
```
File "/gnu/store/hvv0r5nzhbbsnd9s68cmx5q0sznjhnrp-profile/lib/python3.10/site-packages/PIL/ImageFont.py", line 956, in freetype
return FreeTypeFont(font, size, index, encoding, layout_engine)
File "/gnu/store/hvv0r5nzhbbsnd9s68cmx5q0sznjhnrp-profile/lib/python3.10/site-packages/PIL/ImageFont.py", line 247, in __init__
self.font = core.getfont(
OSError: cannot open resource
```
## 413 Request Entity Too Large
On mapping from
=> https://fallback.genenetwork.org/show_trait?trait_id=10002&dataset=HET3-ITPPublish
|
