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From "Maxim Muzafarov (Jira)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-10497) jvm-pause-detector-worker should be JVM singleton
Date Thu, 10 Oct 2019 11:59:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-10497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16948494#comment-16948494
] 

Maxim Muzafarov commented on IGNITE-10497:
------------------------------------------

Moved to the next release due to inactivity. Please, feel free to move it back if you will
be able to complete the ticket by 2.8 code freeze date, December 2, 2019.


> jvm-pause-detector-worker should be JVM singleton
> -------------------------------------------------
>
>                 Key: IGNITE-10497
>                 URL: https://issues.apache.org/jira/browse/IGNITE-10497
>             Project: Ignite
>          Issue Type: Task
>            Reporter: Anton Vinogradov
>            Assignee: Dmitriy Sorokin
>            Priority: Major
>              Labels: newbie
>             Fix For: 2.8
>
>
> Debugging tests I see the following:
> {noformat}
> [2018-11-30 20:36:46,284][WARN ][jvm-pause-detector-worker][CacheConsistencyCheckOnReadTest9]
Possible too long JVM pause: 5861 milliseconds.
> [2018-11-30 20:36:46,287][WARN ][jvm-pause-detector-worker][CacheConsistencyCheckOnReadTest4]
Possible too long JVM pause: 5863 milliseconds.
> [2018-11-30 20:36:46,288][WARN ][jvm-pause-detector-worker][CacheConsistencyCheckOnReadTest3]
Possible too long JVM pause: 5864 milliseconds.
> [2018-11-30 20:36:46,288][WARN ][jvm-pause-detector-worker][CacheConsistencyCheckOnReadTest2]
Possible too long JVM pause: 5864 milliseconds.
> [2018-11-30 20:36:46,289][WARN ][jvm-pause-detector-worker][CacheConsistencyCheckOnReadTest1]
Possible too long JVM pause: 5864 milliseconds.
> [2018-11-30 20:36:46,290][WARN ][jvm-pause-detector-worker][CacheConsistencyCheckOnReadTest0]
Possible too long JVM pause: 5865 milliseconds.
> [2018-11-30 20:36:46,286][WARN ][jvm-pause-detector-worker][CacheConsistencyCheckOnReadTest6]
Possible too long JVM pause: 5863 milliseconds.
> [2018-11-30 20:36:46,286][WARN ][jvm-pause-detector-worker][CacheConsistencyCheckOnReadTest8]
Possible too long JVM pause: 5863 milliseconds.
> [2018-11-30 20:36:46,286][WARN ][jvm-pause-detector-worker][CacheConsistencyCheckOnReadTest5]
Possible too long JVM pause: 5862 milliseconds.
> {noformat}
> Is there any reason to have more that one thread at one JVM?
> Let's make jvm-pause-detector-worker static singleton.



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