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From "Kostas Tzoumas (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (FLINK-2794) Document exactly-once support for sources and sinks
Date Thu, 01 Oct 2015 09:20:26 GMT

     [ https://issues.apache.org/jira/browse/FLINK-2794?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Kostas Tzoumas reassigned FLINK-2794:

    Assignee: Kostas Tzoumas

> Document exactly-once support for sources and sinks
> ---------------------------------------------------
>                 Key: FLINK-2794
>                 URL: https://issues.apache.org/jira/browse/FLINK-2794
>             Project: Flink
>          Issue Type: Bug
>          Components: Documentation, Streaming
>    Affects Versions: 0.10
>            Reporter: Maximilian Michels
>            Assignee: Kostas Tzoumas
>             Fix For: 0.10
> The fault-tolerance attributes of the streaming sources and sinks should be clearly documented.
For example, it should be made clear what the difference between the normal and the PersistentKafkaSource
is and what the implications of using the RollingFileSink in fault-tolerance mode are (It
requires Hadoop 2.7.X for full fault-tolerance support).
> It should be made clear to the users that not all sources/sinks support the exactly-once
guarantees. We could point out that this is not necessarily Flink's fault and that some of
the applications have to implement proper exactly-once support with the outside world themselves.

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