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6e01e821d7
The test is booting nodes, and then immediately starts shutting down
nodes and removing them from the cluster. The shutting down and
removing may happen before driver manages to connect to all nodes in the
cluster. In particular, the driver didn't yet connect to the last
bootstrapped node. Or it can even happen that the driver has connected,
but the control connection is established to the first node, and the
driver fetched topology from the first node when the first node didn't
yet consider the last node to be normal. So the driver decides to close
connection to the last node like this:
```
22:34:03.159 DEBUG> [control connection] Removing host not found in
peers metadata: <Host: 127.42.90.14:9042 datacenter1>
```
Eventually, at the end of the test, only the last node remains, all
other nodes have been removed or stopped. But the driver does not have a
connection to that last node.
Fix this problem by ensuring that:
- all nodes see each other as NORMAL,
- the driver has connected to all nodes
at the beginning of the test, before we start shutting down and removing
nodes.
Fixes scylladb/scylladb#16373
(cherry picked from commit a68701ed4f)
Closes scylladb/scylladb#17702