Hello,

I am new to MongoDB and I am trying to setup a Mongos server. This server will point to an existing replica set of 3 config servers. And after I issue  "mongos --keyFile /opt/mongo/mongo-keyfile --configdb "cfg/cfg1:27017,cfg2:27017,cfg3:27017" --port 27017 --bind_ip_all", it keeps looping as following. Is this normal? Thank you!

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2019-08-02T11:26:56.703-0700 I SHARDING [ConfigServerCatalogCacheLoader-27] Refresh for collection config.system.sessions took 2 ms and found version 1|0||5b223a107f831bca42aeca84
2019-08-02T11:31:56.700-0700 I SHARDING [thread3] Refreshing chunks for collection config.system.sessions based on version 1|0||5b223a107f831bca42aeca84
2019-08-02T11:31:56.703-0700 I SHARDING [ConfigServerCatalogCacheLoader-28] Refresh for collection config.system.sessions took 3 ms and found version 1|0||5b223a107f831bca42aeca84
2019-08-02T11:36:56.701-0700 I SHARDING [thread2] Refreshing chunks for collection config.system.sessions based on version 1|0||5b223a107f831bca42aeca84
2019-08-02T11:36:56.704-0700 I SHARDING [ConfigServerCatalogCacheLoader-29] Refresh for collection config.system.sessions took 2 ms and found version 1|0||5b223a107f831bca42aeca84