lbt05/slacker — comment on commit 5b14de2adad16ce2f7a52b8f5611e9f5c7f13c8c
File: src/slacker/server/cluster.clj line 32
By lbt05:

For this segment, since every time new server in this cluster is added , the metadata of the function will be override. it will cause terrible problem if new servers' codes have version problem.
On the other side,we can't remove that metadata update, if so , we have to restart zookeeper server every time when any tiny code change is commited.

This will not be a big problem if we assume that every server has the same code.But still need to keep it in mind when we are going to add multi-version code support.