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https://issues.apache.org/jira/browse/BEAM-7029?focusedWorklogId=225543&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-225543
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ASF GitHub Bot logged work on BEAM-7029:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 10/Apr/19 13:12
            Start Date: 10/Apr/19 13:12
    Worklog Time Spent: 10m 
      Work Description: mxm commented on issue #8251: [BEAM-7029] Add 
KafkaIO.Read as external transform
URL: https://github.com/apache/beam/pull/8251#issuecomment-481684635
 
 
   @lukecwik That's correct. During implementation I discovered that data is 
always wrapped into `KafakRecord` and went with `Read.TypedWithoutMetaData` to 
get around this. Like you pointed out, we need either 1) a `KafkaRecord` 
standard coder (perhaps something applicable to other messaging systems as well 
or 2) `byte[]` where we implement all coding in the SDK. For both we need to 
provide Coders in the SDK, but the benefit of having a standard coder would be 
a language-independent encoding scheme which is important when dealing with 
cross-language pipelines.
   
   > Also, KafkIO.Read will not work for cross-language transforms till we 
convert it to use SDF (instead of UnboundedSource).
   
   I think we will have to support Read in portable Runners for now until SDF 
is finalized and an adapter for UnboundedSource is available. For the Flink 
Runner this is already the case and other Runners can add it easily. It's not 
so bad because, after all, it is transparent to the user.
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 225543)
    Time Spent: 5h 40m  (was: 5.5h)

> Support KafkaIO to be configured externally for use with other SDKs
> -------------------------------------------------------------------
>
>                 Key: BEAM-7029
>                 URL: https://issues.apache.org/jira/browse/BEAM-7029
>             Project: Beam
>          Issue Type: New Feature
>          Components: io-java-kafka, runner-flink, sdk-py-core
>            Reporter: Maximilian Michels
>            Assignee: Maximilian Michels
>            Priority: Major
>          Time Spent: 5h 40m
>  Remaining Estimate: 0h
>
> As of BEAM-6730, we can externally configure existing transforms from SDKs. 
> We should add more useful transforms then just {{GenerateSequence}}. 
> {{KafkaIO}} is a good candidate.



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