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cdc3cd2b79
In this PR a simple test for fencing is added. It exercises the data plane, meaning if it somehow happens that the node has a stale topology version, then requests from this node will get an error 'stale topology'. The test just decrements the node version manually through CQL, so it's quite artificial. To test a more real-world scenario we need to allow the topology change fiber to sometimes skip unavailable nodes. Now the algorithm fails and retries indefinitely in this case. The PR also adds some logs, and removes one seemingly redundant topology version increment, see the commit messages for details. Closes #14901 * github.com:scylladb/scylladb: test_fencing: add test_fence_hints test.py: output the skipped tests test.py: add skip_mode decorator and fixture test.py: add mode fixture hints: add debug log for dropped hints hints: send_one_hint: extend the scope of file_send_gate holder pylib: add ScyllaMetrics hints manager: add send_errors counter token_metadata: add debug logs fencing: add simple data plane test random_tables.py: add counter column type raft topology: don't increment version when transitioning to node_state::normal