Alexey Serbin created KUDU-2962:
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Summary: Fix kudu::itest::FindTabletFollowers() test utility
function
Key: KUDU-2962
URL: https://issues.apache.org/jira/browse/KUDU-2962
Project: Kudu
Issue Type: Improvement
Components: test
Reporter: Alexey Serbin
The {{kudu::itest::FindTabletFollowers()}} function is unsafe: it uses
{{kudu::itest::FindTabletLeader()}} to generate the result as a complement to
tablet servers hosting the leader replica, but it doesn't sanitize the set of
tablet servers to make sure it contains only tablet servers hosting replicas of
the specified tablet.
For example, if you have a cluster with 10 tablet servers, and a tablet with 3
tablet replicas, passing the map for all tablet servers in the 10-node cluster
would result in {{FindTabletFollowers()}} reporting 9 followers. Whoops!
It's necessary to either fix the implementation of this utility function to
sanitize its first argument, or simply get rid of it.
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