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From "Pavel Kuznetsov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (IGNITE-7575) Concurrent updates of common keys cause silent wrong update count (intermittent issue)
Date Tue, 30 Jan 2018 19:45:03 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-7575?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Pavel Kuznetsov updated IGNITE-7575:
------------------------------------
    Attachment: UpdateTestDrive.java

> Concurrent updates of common keys cause silent wrong update count (intermittent issue)
> --------------------------------------------------------------------------------------
>
>                 Key: IGNITE-7575
>                 URL: https://issues.apache.org/jira/browse/IGNITE-7575
>             Project: Ignite
>          Issue Type: Bug
>          Components: sql
>            Reporter: Pavel Kuznetsov
>            Assignee: Alexander Paschenko
>            Priority: Major
>         Attachments: UpdateTestDrive.java
>
>
> In case of concurrent updates that affects some common keys we get silent wrong update
count
> There's single table with two columns: key and val.
> I'm performing the same query that updates the same 1000 rows. Query doesn't update keys,
it only increments val.
> In some cases I get expected exception "Failed to update some keys because they had been
modified concurrently"  or have 1000 updated rows
> In the other case, API tells me that more than 1000 rows updated. Expected  result are
exception or successfull update of 1000 rows
> see reproducer attached. It should be run against ```ignite/examples/src/main/java/org/apache/ignite/examples/ExampleNodeStartup.java```



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