Ovidiu Marcu commented on ARROW-2551:

Thanks for #2028, it fixed a bug when the client crashed the run will crash the 
plasma store (could change issue type from improvement to bug?).


I am using plasma notifications and I have some issues:

1) I do not get objects in order of their creation and

2) it seems some objects are somehow lost.

> [Plasma] Improve notification logic
> -----------------------------------
>                 Key: ARROW-2551
>                 URL: https://issues.apache.org/jira/browse/ARROW-2551
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Plasma (C++)
>            Reporter: Zhijun Fu
>            Priority: Minor
>              Labels: pull-request-available
>          Time Spent: 1.5h
>  Remaining Estimate: 0h
> There are a few issues in current Plasma notification code:
>  * When a client subscribes to Plasma, the store pushes notifications about 
> existing objects to ALL subscribers, while it should only push to the new 
> subscriber.
>  * And in the above scenario, it should only push "sealed" objects to the new 
> subscriber, while currently it pushes all objects regardless of the state.
>  * When a client disconnects, it will no longer be able to receive 
> notifications, thus the NotificationQueue for the client should be removed 
> from global map.

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