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https://issues.apache.org/jira/browse/FLINK-14498?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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zhijiang reassigned FLINK-14498:
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    Assignee: Yingjie Cao

> Introduce NetworkBufferPool#isAvailable() for interacting with LocalBufferPool
> ------------------------------------------------------------------------------
>
>                 Key: FLINK-14498
>                 URL: https://issues.apache.org/jira/browse/FLINK-14498
>             Project: Flink
>          Issue Type: Task
>          Components: Runtime / Network
>            Reporter: zhijiang
>            Assignee: Yingjie Cao
>            Priority: Minor
>
> If the LocalBufferPool can not request available buffer from 
> NetworkBufferPool, it would wait for 2 seconds before trying to request again 
> in a loop way. Therefore it would bring some delays in practice.
> To improve this interaction, we could introduce NetworkBufferPool#isAvailable 
> to return a future which would be monitored by LocalBufferPool. Then once 
> there are available buffers in NetworkBufferPool, it would complete this 
> future to notify LocalBufferPool immediately. 



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