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https://issues.apache.org/jira/browse/IGNITE-5562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16055862#comment-16055862
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Sergey Chugunov commented on IGNITE-5562:
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Thinking more generally I believe we must prohibit any assertions in metrics.
We may print out warnings to logs at max.
> Assertions in TCP discovery SPI when NTP is moving time backwards
> -----------------------------------------------------------------
>
> Key: IGNITE-5562
> URL: https://issues.apache.org/jira/browse/IGNITE-5562
> Project: Ignite
> Issue Type: Bug
> Components: general
> Affects Versions: 1.7
> Reporter: Alexey Goncharuk
> Fix For: 2.1
>
>
> In several places in TcpDiscoverySPI, when metrics are updated, we assert
> that time is not negative. However, in some cases, this invariant may fail
> because of time adjustments.
> Since a missed metric is not critical for us, we should remove these
> assertions and replace negative time with 0.
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