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From "Chesnay Schepler (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLINK-6215) Make the StatefulSequenceSource scalable.
Date Mon, 13 Aug 2018 08:03:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-6215?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chesnay Schepler updated FLINK-6215:
------------------------------------
    Fix Version/s:     (was: 1.3.4)

> Make the StatefulSequenceSource scalable.
> -----------------------------------------
>
>                 Key: FLINK-6215
>                 URL: https://issues.apache.org/jira/browse/FLINK-6215
>             Project: Flink
>          Issue Type: Bug
>          Components: DataStream API
>    Affects Versions: 1.3.0
>            Reporter: Kostas Kloudas
>            Assignee: Kostas Kloudas
>            Priority: Major
>
> Currently the {{StatefulSequenceSource}} instantiates all the elements to emit first
and keeps them in memory. This is not scalable as for large sequences of elements this can
lead to out of memory exceptions.
> To solve this, we can pre-partition the sequence of elements based on the {{maxParallelism}}
parameter, and just keep state (to checkpoint) per such partition.



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