Use TCP client for id lookup

[Kristoffer Sjögren <st...@gmail.com>]

Hi

I'm trying to understand how to lookup certain id fields of RDDs to an
external mapping table. The table is accessed through a two-way binary
tcp client where an id is provided and entry returned. Entries cannot
be listed/scanned.

What's the simplest way of managing the tcp client and its connections
towards the external system? I suppose I cannot use the tcp client in
a mapToPair() call?

Cheers,
-Kristoffer

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