Commits on Apr 10, 2024

1. rafttest: reduce waitLeader flakiness …

   There are a few tests requiring a stable leader. For example,
   TestBasicProgress waits for a leader, submits 100 proposals, and expects
   that all 100 proposals are committed. In rare cases, a leader is
   elected, and the test proceeds, but in the meantime another node
   campaigns and wins a higher-term election. After this, some proposals
   end up not committed (legitimately), and the test fails.
   
   This commit modifies the waitLeader function with a better heuristic for
   a stable leader. It now waits until the leader has the highest term in
   the cluster, which more reliably (although not 100%) guarantees that
   there is no in-flight campaign that is about to win.
   
   Signed-off-by: Pavel Kalinnikov <[email protected]>

   

   pav-kv committed Apr 10, 2024
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