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Posted to commits@beam.apache.org by "Ben Sidhom (JIRA)" <ji...@apache.org> on 2018/05/03 21:20:00 UTC

[jira] [Created] (BEAM-4231) Runner utility for Coder instantiation

Ben Sidhom created BEAM-4231:
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             Summary: Runner utility for Coder instantiation
                 Key: BEAM-4231
                 URL: https://issues.apache.org/jira/browse/BEAM-4231
             Project: Beam
          Issue Type: Bug
          Components: runner-core
            Reporter: Ben Sidhom
            Assignee: Ben Sidhom


Portable runners need to instantiate coders for communicating with SDK harnesses in a consistent way. They cannot simply instantiate coders as defined by PCollections because some component coders may only be known to specific SDKs. Unknown coders should be length-prefixed; the underlying elements should only be exposed to runners as byte strings.



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