Spring Cloud Consul config watch keeps generating warning messages

[bryanxtong]

Describe the bug
Spring Cloud Consul config 5.0.0 keeps giving us warnings messages when enabling config watches for configuration, and the config data can be found with config/application/data(data is the key).

[
{
"key": "config/",
"flags": 0,
"value": ""
},
{
"key": "config/application/",
"flags": 0,
"value": ""
},
{
"key": "config/application/data",
"flags": 0,
"value": "bG9nZ2luZzoKICBsZXZlbDoKICAgIG9yZy5zcHJpbmdmcmFtZXdvcmsuY29yZS5lbnY6IERFQlVH"
},
{
"key": "config/gateway/",
"flags": 0,
"value": ""
},
{
"key": "config/gateway/data",
"flags": 0,
"value": ""
}
]

Sample

gateway.zip

The logs are as below. and if set fail fast, It will produce errors. and actually, we had provided the config items in consul KV.

2026-01-26T18:44:20.470+08:00 WARN 36468 --- [gateway] [TaskScheduler-1] o.s.cloud.consul.config.ConfigWatch : Error querying consul Key/Values for context 'config/gateway/'. Message: I/O error on GET request for "http://localhost:8500/v1/kv/config/gateway/": null
2026-01-26T18:44:30.475+08:00 WARN 36468 --- [gateway] [ctor-http-nio-5] r.netty.http.client.HttpClientConnect : [74757339-1, L:/127.0.0.1:62403 - R:localhost/127.0.0.1:8500] The connection observed an error

io.netty.handler.timeout.ReadTimeoutException

2026-01-26T18:44:30.475+08:00 WARN 36468 --- [gateway] [TaskScheduler-1] o.s.cloud.consul.config.ConfigWatch : Error querying consul Key/Values for context 'config/application/'. Message: I/O error on GET request for "http://localhost:8500/v1/kv/config/application/": null
2026-01-26T18:45:10.488+08:00 WARN 36468 --- [gateway] [ctor-http-nio-7] r.netty.http.client.HttpClientConnect : [61d86986-1, L:/127.0.0.1:62448 - R:localhost/127.0.0.1:8500] The connection observed an error

io.netty.handler.timeout.ReadTimeoutException

2026-01-26T18:45:10.489+08:00 WARN 36468 --- [gateway] [TaskScheduler-1] o.s.cloud.consul.config.ConfigWatch : Error querying consul Key/Values for context 'config/gateway/'. Message: I/O error on GET request for "http://localhost:8500/v1/kv/config/gateway/": null
2026-01-26T18:45:20.504+08:00 WARN 36468 --- [gateway] [ctor-http-nio-2] r.netty.http.client.HttpClientConnect : [df3e3ad3-25, L:/127.0.0.1:62388 - R:localhost/127.0.0.1:8500] The connection observed an error

io.netty.handler.timeout.ReadTimeoutException