Aleksey Plekhanov created IGNITE-17895:
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Summary: Assertion on histogram update if currentTimeMillis
decreases
Key: IGNITE-17895
URL: https://issues.apache.org/jira/browse/IGNITE-17895
Project: Ignite
Issue Type: Bug
Reporter: Aleksey Plekhanov
Assignee: Aleksey Plekhanov
Histogram metric classes (\{{HistogramMetricImpl}},
\{{PeriodicHistogramMetricImpl}}) assume that timestamp is always increasing,
but in some cases method {{U.currentTimeMillis()}} can return decreasing values
(for example, if time was set manually or on NTP sync). In these cases
assertion can be thrown on histogram update:
{noformat}
java.lang.AssertionError: null
at
org.apache.ignite.internal.processors.metric.impl.HistogramMetricImpl.value(HistogramMetricImpl.java:61)
~[classes/:?]
at
org.apache.ignite.internal.util.StripedExecutor$Stripe.body(StripedExecutor.java:643)
[classes/:?]
at org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:125)
[classes/:?]
at java.lang.Thread.run(Thread.java:750) [?:1.8.0_322]{noformat}
We should fix {{PeriodicHistogramMetricImpl#add}} and
{{HistogramMetricImpl#value}} methods to work correctly with decreasing
timestamps.
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