https://github.com/mongodb/mongo/blob/d7fb557f6fc6d486fa7107a8f64342caf552eeb4/src/mongo/db/s/shard_filtering_metadata_refresh.cpp#L134

For example, if the collection was foo.bar, log message currently looks like this:

"Failed to refresh metadata for collectionfoo.bar"

which can make search via exact words in the log miss this entry.