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https://issues.apache.org/jira/browse/KUDU-1887?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Henry Robinson reassigned KUDU-1887:
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Assignee: Henry Robinson
> Allow RPC handlers to discard inbound transfer
> ----------------------------------------------
>
> Key: KUDU-1887
> URL: https://issues.apache.org/jira/browse/KUDU-1887
> Project: Kudu
> Issue Type: Improvement
> Components: rpc
> Affects Versions: 1.2.0
> Reporter: Henry Robinson
> Assignee: Henry Robinson
> Priority: Minor
>
> This is a general feature request for using KRPC in Impala, not something
> that affects Kudu itself right not AFAIK.
> A common pattern with communication patterns where a lot of flows fan-in to a
> single server is for the server to delay returning a response to a client for
> a while, in order to implement some kind of flow control when the server is
> at capacity.
> If a client sends a lot of data (perhaps by sidecar - KUDU-1866), there's
> currently no way AFAICT to retain the {{RpcContext}} needed to delay sending
> the response, but to drop the associated transfer buffer (that, presumably,
> is putting the server over its capacity).
> So we could have {{RpcContext::DiscardTransfer()}} which drops the
> {{InboundCall}}'s {{InboundTransfer}}. Since this likely to be called after
> handling the request, the request protobuf should still be independently
> attached to the {{RpcContext}}. After {{DiscardTransfer}}, it's an error to
> look at any inbound sidecars.
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