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From "Sergey Chugunov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-8957) testFailGetLock() constantly fails. Last entry checkpoint history can be empty
Date Fri, 13 Jul 2018 15:12:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-8957?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16543325#comment-16543325

Sergey Chugunov commented on IGNITE-8957:


I replied to your comments in Pull Request, most of them were fixed.

To the question about *walSegmentsCleared* improvement I think it is not rational to include
it to the current ticket which is about fixing test failure so I created another one: IGNITE-9003.

Feel free to pick it up and improve other things that were not covered in this ticket.

Thank you for your efforts!

> testFailGetLock() constantly fails. Last entry checkpoint history can be empty
> ------------------------------------------------------------------------------
>                 Key: IGNITE-8957
>                 URL: https://issues.apache.org/jira/browse/IGNITE-8957
>             Project: Ignite
>          Issue Type: Bug
>          Components: persistence
>    Affects Versions: 2.7
>            Reporter: Maxim Muzafarov
>            Assignee: Andrew Medvedev
>            Priority: Major
>              Labels: MakeTeamcityGreenAgain
>             Fix For: 2.7
> IgniteChangeGlobalStateTest#testFailGetLock constantly fails with exception:
> {code}
> java.lang.AssertionError
> 	at org.apache.ignite.internal.processors.cache.persistence.checkpoint.CheckpointHistory.onCheckpointFinished(CheckpointHistory.java:205)
> 	at org.apache.ignite.internal.processors.cache.persistence.GridCacheDatabaseSharedManager$Checkpointer.markCheckpointEnd(GridCacheDatabaseSharedManager.java:3654)
> 	at org.apache.ignite.internal.processors.cache.persistence.GridCacheDatabaseSharedManager$Checkpointer.doCheckpoint(GridCacheDatabaseSharedManager.java:3178)
> 	at org.apache.ignite.internal.processors.cache.persistence.GridCacheDatabaseSharedManager$Checkpointer.body(GridCacheDatabaseSharedManager.java:2953)
> 	at org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:110)
> 	at java.lang.Thread.run(Thread.java:748)
> {code}
> As Sergey Chugunov [mentioned|https://issues.apache.org/jira/browse/IGNITE-8737?focusedCommentId=16535062&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16535062],
issue can be solved different ways:
> {quote}
> It seems we missed a case when lastEntry may be empty. We may choose here from two options:
> * Check if histMap is empty inside onCheckpointFinished. If it is just don't log anything
(it was the very first checkpoint).
> * Check in caller that there is no history, calculate necessary index in caller and pass
it to onCheckpointFinished to prepare correct log message.{quote}

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