KAFKA-10854: Fix flaky testConnectionRatePerIp test#9752
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dajac merged 1 commit intoapache:trunkfrom Dec 15, 2020
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…keys * apache-github/trunk: KAFKA-10776: Add version attribute in RequestsPerSec metrics documentation (apache#9661) KAFKA-10854: fix flaky testConnectionRatePerIp test (apache#9752) KAFKA-10525: Emit JSONs with new auto-generated schema (KIP-673) (apache#9526)
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thanks for the fix! |
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The flaky test is because we expected our last(6th) connection will be the one connection who got throttled, but this is not true. The reason is:
(1)
selector.select()will return the channels that are ready, so the last connection might not get ready in the last(2) the
selector.selectedKeys()returnsSet<SelectionKey>, and the data structureSetdoesn't provide any ordering guaranteesSo, to fix it, in the setup phase, I created (maximum allowable number + 1) of connections, and make sure there's 1 connection throttled. And then, we can make sure the next connection will also get throttled( of course the time is not ticking due to we use
MockTime), so that we can make the tests more reliable.Committer Checklist (excluded from commit message)