[jira] [Commented] (CASSANDRA-9794) Linearizable consistency for lightweight transactions is not achieved

["Andrey Konstantinov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-9794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14625685#comment-14625685 ] 

Andrey Konstantinov commented on CASSANDRA-9794:
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I have also tried Simple strategy and NetworkTopologyStrategy. An issue is observable with both.

> Linearizable consistency for lightweight transactions is not achieved
> ---------------------------------------------------------------------
>
>                 Key: CASSANDRA-9794
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9794
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>         Environment: Client: windows, datastax C# driver, application attached
> Server: single node, datastax community edition 2.1.7, ubuntu (but same happens with datastax community windows)
>            Reporter: Andrey Konstantinov
>         Attachments: Cassandra.LocksTest.7z
>
>
> I run into an issue with unexpected behavior of lightweight transactions. I am not sure whether it is a Cassandra bug, C# driver bug or I am doing something wrong. Please, help me to find the right direction.
> I am attaching windows application and sources reproducing the following issues. 
> 1) INSERT IF NOT EXISTS returns TRUE, when a record has not been applied (run a client in mode "local" or "persisted" and observe an exception)
> 2) INSERT IF NOT EXISTS returns FALSE, when a record has been applied (run a client in mode "local" or "persisted" and observe hanged application)
> 3) The same issues with conditional UPDATE (run a client in mode "embedded" and observe either an exception or hanged application)
> 4) SELECT with SERIAL consistency level does not return the latest record (run a client in mode "persisted" or "embedded" and observe an exception about mismatched counters)
> The client sources have got comments pointing out to 4 problems, where, I think, an error happens. The application can be run with 3 different modes ("local", "persisted", "embedded") trying the same thing from different perspectives.
> Note: I run into a problem with setting SERIAL consistency level for SELECT queries using C# datastax driver. So, I patched it temporary. Diff file as well as the compiled driver are placed within the application packages folder. It would be great, if you could point me out if I am doing something wrong with the driver API or if this issue should be reported to datastax.
> Note: I am not sure if I followed all the rules submitting an issue, so, please, adjust necessary fields. I am happy to submit more information, please, let me know what I should check/do...
> Thanks,
> Andrey



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