[jira] [Updated] (CASSANDRA-8446) Lost writes when using lightweight transactions

["Philip Thompson (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-8446?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Philip Thompson updated CASSANDRA-8446:
---------------------------------------
    Reproduced In: 2.1.2
    Fix Version/s: 2.1.3

> Lost writes when using lightweight transactions
> -----------------------------------------------
>
>                 Key: CASSANDRA-8446
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8446
>             Project: Cassandra
>          Issue Type: Bug
>          Components: API, Core
>         Environment: Cassandra 2.1.2 on Java(TM) SE Runtime Environment (build 1.7.0_65-b17)
>            Reporter: Jochen Zeischka
>             Fix For: 2.1.3
>
>
> There's a serious problem when using lightweight transactions. Whenever th cluster gets any load, write timeout exceptions start to occur and the client has no way to know whether the write actually succeeded or not.
> I a simple test (https://gist.github.com/anonymous/4c83f2962b57fce4c3df) this results in large percentages of lost writes (0 - 50%, depending on the load).
> The problem was described in https://stackoverflow.com/questions/27313360/how-can-we-avoid-losing-writes-when-using-lightweight-transactions-cas-in-cass



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