Merci pour ta réponse Sylvain.
Justement, le fichier worker-stdout.log est complètement vide. Par contre, le fichier worker-stderr.log n’est pas vide. Il y a beaucoup de lignes concernant elasticsearch (qui pourtant ne ressemblent pas à des erreurs) :
2018-12-04 01:00:14 +0000: < {"took":9,"timed_out":false,"total":0,"deleted":0,"batches":0,"version_conflicts":0,"noops":0,"retries":{"bulk":0,"search":0},"throttled_millis":0,"requests_per_second":-1.0,"throttled_until_millis":0,"failures":[]} 2018-12-04 01:00:15 +0000: POST http://elasticsearch:9200/stats/machine [status:201, request:0.632s, query:n/a] 2018-12-04 01:00:15 +0000: > {"created_at":"2018-12-04T01:00:14.748Z","updated_at":"2018-12-04T01:00:14.749Z","type":"booking","subType":"petite-fraiseuse","date":"2018-12-03","stat":1,"userId":4,"gender":"female","age":20,"group":"student","reservationId":1,"ca":0.0,"name":"Fraiseuse","machineId":5} 2018-12-04 01:00:15 +0000: < {"_index":"stats","_type":"machine","_id":"AWd2utQ3bILmNRnXb0Pt","_version":1,"result":"created","_shards":{"total":1,"successful":1,"failed":0},"created":true} 2018-12-04 01:00:15 +0000: POST http://elasticsearch:9200/stats/machine [status:201, request:0.069s, query:n/a] 2018-12-04 01:00:15 +0000: > {"created_at":"2018-12-04T01:00:15.382Z","updated_at":"2018-12-04T01:00:15.383Z","type":"hour","subType":"petite-fraiseuse","date":"2018-12-03","stat":1,"userId":4,"gender":"female","age":20,"group":"student","reservationId":1,"ca":0.0,"name":"Fraiseuse","machineId":5} 2018-12-04 01:00:15 +0000: < {"_index":"stats","_type":"machine","_id":"AWd2utacbILmNRnXb0Pu","_version":1,"result":"created","_shards":{"total":1,"successful":1,"failed":0},"created":true} 2018-12-04 01:00:15 +0000: POST http://elasticsearch:9200/stats/user [status:201, request:0.056s, query:n/a] 2018-12-04 01:00:15 +0000: > {"created_at":"2018-12-04T01:00:15.734Z","updated_at":"2018-12-04T01:00:15.734Z","type":"revenue","subType":"student","date":"2018-12-03","stat":0,"userId":4,"gender":"female","age":20,"group":"student"} 2018-12-04 01:00:15 +0000: < {"_index":"stats","_type":"user","_id":"AWd2utf8bILmNRnXb0Pv","_version":1,"result":"created","_shards":{"total":1,"successful":1,"failed":0},"created":true}