Alexey Serbin created KUDU-2947:
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Summary: A replica with slow WAL may grant votes even if
established leader is alive and well
Key: KUDU-2947
URL: https://issues.apache.org/jira/browse/KUDU-2947
Project: Kudu
Issue Type: Bug
Components: consensus, master, tserver
Reporter: Alexey Serbin
Assignee: Alexey Serbin
In some cases when WAL operations are slow, a follower replica may grant
{{yes}} votes right after processing recent Raft transactions even if currently
established leader replica is alive and well. Vote requests might come from so
called disruptive replicas in the cluster. The disruptive replicas might ask
for votes of higher Raft term than the current term with established and well
being leader.
In some cases that might lead to multiple successive election rounds even if
there were no actual reason to re-elect leader replicas.
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