currently, when we find something not so good during boot, we will print log immediately eg:
- use deprecated configuration - port listen failed - ...... most developers will not notice these important messages so maybe we can keep current implementation and collect all the information, print them after boot maybe like: *************** important message *************** warning: 1.servicecomb.rest.client.thread-count is ambiguous, suggest to use servicecomb.rest.client.verticle-count. error: 1.......
