Version: 1.00-SNAPSHOT

The method 
update(Query<T> query, UpdateOperations<T> ops, boolean createIfMissing, WriteConcern wc)

calls an update wiht multi=false, therefore only the first entity is updated.
Also the given WriteConcern wc is ignored.

I would expect the following implementation:

public <T> UpdateResults<T> update(Query<T> query, UpdateOperations<T> ops,   boolean createIfMissing, WriteConcern wc) {
        return update(query, ops, createIfMissing, true, wc);
    }