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https://issues.apache.org/jira/browse/IGNITE-17945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17647065#comment-17647065
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Andrey Mashenkov commented on IGNITE-17945:
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Things that looks like "hanging outside the JVM" usually are bad thread/IO
scheduling in the OS (due to priority, context switching+too much threads,
external hypervisor scheduler), IO issues, system clock time jump, CPU
throttling.
I never heard about "hardware freeze", high frequency generator in CPU just
works and CPU make a progress, what progress - depends on OS demands.
What is "bulk loading"? How can one diagnosis "bulk loading" issue?
> Change message in case watchdog thread observes freeze
> ------------------------------------------------------
>
> Key: IGNITE-17945
> URL: https://issues.apache.org/jira/browse/IGNITE-17945
> Project: Ignite
> Issue Type: Improvement
> Reporter: Dmitry Pavlov
> Assignee: Julia Bakulina
> Priority: Minor
> Labels: ise, newbie
> Fix For: 2.15
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> In Long JVM pause detector we warn user that the thread wasn't alive for a
> threshold
> Possible too long JVM pause: 500+ milliseconds.
> But it is often treated as a GC pause.
> We can change that warning to
> Possible too long JVM pause: 500+ milliseconds. (GC pause or hardware
> temporary freeze)
> To enlist possible reasons behind that behaviour
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