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https://issues.apache.org/jira/browse/BEAM-10670?focusedWorklogId=599448&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-599448
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ASF GitHub Bot logged work on BEAM-10670:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 19/May/21 20:53
            Start Date: 19/May/21 20:53
    Worklog Time Spent: 10m 
      Work Description: boyuanzz commented on a change in pull request #14801:
URL: https://github.com/apache/beam/pull/14801#discussion_r635576996



##########
File path: 
runners/flink/src/main/java/org/apache/beam/runners/flink/FlinkRunner.java
##########
@@ -74,7 +75,19 @@ protected FlinkRunner(FlinkPipelineOptions options) {
 
   @Override
   public PipelineResult run(Pipeline pipeline) {
-    
SplittableParDo.convertReadBasedSplittableDoFnsToPrimitiveReadsIfNecessary(pipeline);
+    // Portable flink only support SDF as read.

Review comment:
       There is no `deprecated read` under `beam_fn_api` context. Splittable 
DoFn is the only source-like operation when with `beam_fn_api`. So if a fnapi 
job is using `deprecated read`, there is no runtime error but the pipeline will 
just stuck. 




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Issue Time Tracking
-------------------

    Worklog Id:     (was: 599448)
    Time Spent: 44h 10m  (was: 44h)

> Make non-portable Splittable DoFn the only option when executing Java "Read" 
> transforms
> ---------------------------------------------------------------------------------------
>
>                 Key: BEAM-10670
>                 URL: https://issues.apache.org/jira/browse/BEAM-10670
>             Project: Beam
>          Issue Type: Improvement
>          Components: sdk-java-core
>            Reporter: Luke Cwik
>            Assignee: Ismaël Mejía
>            Priority: P1
>              Labels: Clarified
>             Fix For: 2.30.0
>
>          Time Spent: 44h 10m
>  Remaining Estimate: 0h
>
> All runners seem to be capable of migrating to splittable DoFn for 
> non-portable execution except for Dataflow runner v1 which will internalize 
> the current primitive read implementation that is shared across runner 
> implementations.



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