Nikita Amelchev created IGNITE-29271:
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Summary: Fix flaky ClusterMetricsSelfTest
Key: IGNITE-29271
URL: https://issues.apache.org/jira/browse/IGNITE-29271
Project: Ignite
Issue Type: Bug
Reporter: Nikita Amelchev
Assignee: Nikita Amelchev
{{GridDhtPartitionsExchangeFuture#onDone}} updates the {{DurationHistogram}}
and {{CacheOperationsBlockedDurationHistogram}} metrics only after
{{super.onDone()}}, so the test, which waits for the {{Duration}} metric to
drop to zero (that is, for {{isDone()}}) and then reads the histograms,
sporadically sees the previous counts. The {{CacheOperationsBlockedDuration}}
check has the same race: {{GridCachePartitionExchangeManager}} publishes a new
exchange future as {{lastTopologyFuture()}} before {{init()}} sets
{{initTime}}, and until then {{currentPMEDuration(true)}} returns zero.
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