We see quite some 499 errors on production nginx access logs, seems all come from the semmeddb/query endpoint:
x.x.x.x - - [11/Mar/2024:07:01:50 +0000] "POST /semmeddb/query?with_total=true&fields=object.ncbigene,predication.pmid,pred
ication.sentence,subject.name,object.name&filter=predicate:PART_OF+AND+object.semantic_type_abbreviation:aapp+AND+_exists_:objec
t.ncbigene+AND+pmid_count:%3E3&size=1000 HTTP/1.1" 499 0 "-" "BTE/prod Node/v16.20.0 linux"
Let's investigate if anything we can do to reduce such errors