[jira] [Updated] (FLINK-4399) Add support for oversized messages

["Till Rohrmann (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-4399?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Till Rohrmann updated FLINK-4399:
---------------------------------
    Labels: flip-6  (was: )

> Add support for oversized messages
> ----------------------------------
>
>                 Key: FLINK-4399
>                 URL: https://issues.apache.org/jira/browse/FLINK-4399
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Distributed Coordination
>         Environment: FLIP-6 feature branch
>            Reporter: Stephan Ewen
>              Labels: flip-6
>
> Currently, messages larger than the maximum Akka Framesize cause an error when being transported. We should add a way to pass messages that are larger than the Framesize, as may happen for:
>   - {{collect()}} calls that collect large data sets (via accumulators)
>   - Job submissions and operator deployments where the functions closures are large (for example because it contains large pre-loaded data)
>   - Function restore in cases where restored state is larger than checkpointed state (union state)
> I suggest to use the {{BlobManager}} to transfer large payload.
>   - On the sender side, oversized messages are stored under a transient blob (which is deleted after first retrieval, or after a certain number of minutes)
>   - The sender sends a "pointer to blob message" instead.
>   - The receiver grabs the message from the blob upon receiving the pointer message
> The RPC Service should be optionally initializable with a "large message handler" which is internally the {{BlobManager}}.



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