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https://issues.apache.org/jira/browse/FLINK-8755?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nico Kruber updated FLINK-8755:
-------------------------------
    Priority: Blocker  (was: Major)

> SpilledSubpartitionView wrongly relys on the backlog for determining whether 
> more data is available
> ---------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-8755
>                 URL: https://issues.apache.org/jira/browse/FLINK-8755
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Network
>            Reporter: Nico Kruber
>            Assignee: Nico Kruber
>            Priority: Blocker
>             Fix For: 1.5.0
>
>
> {code}
> public BufferAndBacklog getNextBuffer() throws IOException, 
> InterruptedException {
> //...
>         int newBacklog = parent.decreaseBuffersInBacklog(current);
>         return new BufferAndBacklog(current, newBacklog > 0, newBacklog, 
> nextBufferIsEvent);
> {code}
> relies on the backlog to signal further data availability. However, if there 
> are only events left in the buffer queue, their buffers are not included in 
> the backlog counting and therefore, {{isMoreAvailable}} will be wrongly 
> {{false}} here.



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