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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-7871) Implement 2-phase waiting for partition release
Date Tue, 11 Dec 2018 10:05:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-7871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16716746#comment-16716746

ASF GitHub Bot commented on IGNITE-7871:

Github user Jokser closed the pull request at:


> Implement 2-phase waiting for partition release
> -----------------------------------------------
>                 Key: IGNITE-7871
>                 URL: https://issues.apache.org/jira/browse/IGNITE-7871
>             Project: Ignite
>          Issue Type: Improvement
>          Components: cache
>    Affects Versions: 2.4
>            Reporter: Pavel Kovalenko
>            Assignee: Alexey Goncharuk
>            Priority: Major
>             Fix For: 2.5
> Using validation implemented in IGNITE-7467 we can observe the following situation:
> Let's we have some partition and nodes which owning it N1 (primary) and N2 (backup)
> 1) Exchange is started
> 2) N2 finished waiting for partitions release and started to create Single message (with
update counters).
> 3) N1 waits for partitions release.
> 4) We have pending cache update N1 -> N2. This update is done after step 2.
> 5) This update increments update counters both on N1 and N2.
> 6) N1 finished waiting for partitions release, while N2 already sent Single message to
coordinator with outdated update counter.
> 7) Coordinator sees different partition update counters for N1 and N2. Validation is
failed, while data is equal.  
> Solution:
> Every server node participating in PME should wait while all other server nodes will
finish their ongoing updates (finish wait for partition release method)

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