Client has attempted to reauthenticate as a single user

mongodb version 5.0.27

mongodb pss cluster

Hi, everyone. What is the trigger for this? Why does this warning log appear? What is the impact on the cluster?

shot min: 443957, snapshot max: 443957 snapshot count: 0, oldest timestamp: (1718102969, 1) , meta checkpoint timestamp: (1718103269, 1) base write gen: 44"}}
{"t":{"$date":"2024-06-11T18:55:32.742+08:00"},"s":"W",  "c":"ACCESS",   "id":5626700, "ctx":"conn11","msg":"Client has attempted to reauthenticate as a single user","attr":{"user":{"user":"__system","db":"local"}}}
{"t":{"$date":"2024-06-11T18:55:32.742+08:00"},"s":"W",  "c":"ACCESS",   "id":5626700, "ctx":"conn12","msg":"Client has attempted to reauthenticate as a single user","attr":{"user":{"user":"__system","db":"local"}}}
{"t":{"$date":"2024-06-11T18:55:32.742+08:00"},"s":"I",  "c":"ACCESS",   "id":20250,   "ctx":"conn11","msg":"Authentication succeeded","attr":{"mechanism":"SCRAM-SHA-256","speculative":false,"principalName":"__system","authenticationDatabase":"local","remote":"192.168.33.23:46554","extraInfo":{}}}
{"t":{"$date":"2024-06-11T18:55:32.742+08:00"},"s":"I",  "c":"ACCESS",   "id":20250,   "ctx":"conn12","msg":"Authentication succeeded","attr":{"mechanism":"SCRAM-SHA-256","speculative":false,"principalName":"__system","authenticationDatabase":"local","remote":"192.168.33.23:46556","extraInfo":{}}}
{"t":{"$date":"2024-06-11T18:55:32.743+08:00"},"s":"W",  "c":"ACCESS",   "id":5626700, "ctx":"conn12","msg":"Client has attempted to reauthenticate as a single user","attr":{"user":{"user":"__system","db":"local"}}}
{"t":{"$date":"2024-06-11T18:55:32.743+08:00"},"s":"I",  "c":"ACCESS",   "id":20250,   "ctx":"conn12","msg":"Authentication succeeded","attr":{"mechanism":"SCRAM-SHA-256","speculative":false,"principalName":"__system","authenticationDatabase":"local","remote":"192.168.33.23:46556","extraInfo":{}}}
{"t":{"$date":"2024-06-11T18:55:32.747+08:00"},"s":"W",  "c":"ACCESS",   "id":5626700, "ctx":"conn12","msg":"Client has attempted to reauthenticate as a single user","attr":{"user":{"user":"__system","db":"local"}}}
{"t":{"$date":"2024-06-11T18:55:32.747+08:00"},"s":"I",  "c":"ACCESS",   "id":20250,   "ctx":"conn12","msg":"Authentication succeeded","attr":{"mechanism":"SCRAM-SHA-256","speculative":false,"principalName":"__system","authenticationDatabase":"local","remote":"192.168.33.23:46556","extraInfo":{}}}
{"t":{"$date":"2024-06-11T18:55:32.747+08:00"},"s":"W",  "c":"ACCESS",   "id":5626700, "ctx":"conn12","msg":"Client has attempted to reauthenticate as a single user","attr":{"user":{"user":"__system","db":"local"}}}
{"t":{"$date":"2024-06-11T18:55:32.747+08:00"},"s":"I",  "c":"ACCESS",   "id":20250,   "ctx":"conn12","msg":"Authentication succeeded","attr":{"mechanism":"SCRAM-SHA-256","speculative":false,"principalName":"__system","authenticationDatabase":"local","remote":"192.168.33.23:46556","extraInfo":{}}}
{"t":{"$date":"2024-06-11T18:55:38.381+08:00"},"s":"I",  "c":"STORAGE",  "id":22430,   "ctx":"Checkpointer","msg":"WiredTiger message","attr":{"message":"[1718103338:381165][25242:0x7f97ef78d700], WT_SESSION.checkpoint: [WT_VERB_CHECKPOINT_PROGRESS] saving checkpoint snapshot min: 443976, snapshot max: 443976 snapshot count: 0, oldest timestamp: (1718103032, 1) , meta checkpoint timestamp: (1718103332, 1) base write gen: 44"}}
{"t":{"$date":"2024-06-11T18:55:52.510+08:00"},"s":"W",  "c":"ACCESS",   "id":5626700, "ctx":"conn17","msg":"Client has attempted to reauthenticate as a single user","attr":{"user":{"user":"__system","db":"local"}}}
{"t":{"$date":"2024-06-11T18:55:52.510+08:00"},"s":"I",  "c":"ACCESS",   "id":20250,   "ctx":"conn17","msg":"Authentication succeeded","attr":{"mechanism":"SCRAM-SHA-256","speculative":false,"principalName":"__system","authenticationDatabase":"local","remote":"192.168.33.23:46850","extraInfo":{}}}
{"t":{"$date":"2024-06-11T18:55:52.511+08:00"},"s":"W",  "c":"ACCESS",   "id":5626700, "ctx":"conn17","msg":"Client has attempted to reauthenticate as a single user","attr":{"user":{"user":"__system","db":"local"}}}
{"t":{"$date":"2024-06-11T18:55:52.511+08:00"},"s":"I",  "c":"ACCESS",   "id":20250,   "ctx":"conn17","msg":"Authentication succeeded","attr":{"mechanism":"SCRAM-SHA-256","speculative":false,"principalName":"__system","authenticationDatabase":"local","remote":"192.168.33.23:46850","extraInfo":{}}}
{"t":{"$date":"2024-06-11T18:55:52.511+08:00"},"s":"W",  "c":"ACCESS",   "id":5626700, "ctx":"conn17","msg":"Client has attempted to reauthenticate as a single user","attr":{"user":{"user":"__system","db":"local"}}}
{"t":{"$date":"2024-06-11T18:55:52.511+08:00"},"s":"I",  "c":"ACCESS",   "id":20250,   "ctx":"conn17","msg":"Authentication succeeded","attr":{"mechanism":"SCRAM-SHA-256","speculative":false,"principalName":"__system","authenticationDatabase":"local","remote":"192.168.33.23:46850","extraInfo":{}}}
{"t":{"$date":"2024-06-11T18:55:52.512+08:00"},"s":"W",  "c":"ACCESS",   "id":5626700, "ctx":"conn17","msg":"Client has attempted to reauthenticate as a single user","attr":{"user":{"user":"__system","db":"local"}}}
{"t":{"$date":"2024-06-11T18:55:52.512+08:00"},"s":"I",  "c":"ACCESS",   "id":20250,   "ctx":"conn17","msg":"Authentication succeeded","attr":{"mechanism":"SCRAM-SHA-256","speculative":false,"principalName":"__system","authenticationDatabase":"local","remote":"192.168.33.23:46850","extraInfo":{}}}
{"t":{"$date":"2024-06-11T18:55:52.527+08:00"},"s":"W",  "c":"ACCESS",   "id":5626700, "ctx":"conn17","msg":"Client has attempted to reauthenticate as a single user","attr":{"user":{"user":"__system","db":"local"}}}
{"t":{"$date":"2024-06-11T18:55:52.527+08:00"},"s":"I",  "c":"ACCESS",   "id":20250,   "ctx":"conn17","msg":"Authentication succeeded","attr":{"mechanism":"SCRAM-SHA-256","speculative":false,"principalName":"__system","authenticationDatabase":"local","remote":"192.168.33.23:46850","extraInfo":{}}}