[
https://issues.apache.org/jira/browse/BEAM-9624?focusedWorklogId=413263&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-413263
]
ASF GitHub Bot logged work on BEAM-9624:
----------------------------------------
Author: ASF GitHub Bot
Created on: 31/Mar/20 15:19
Start Date: 31/Mar/20 15:19
Worklog Time Spent: 10m
Work Description: lukecwik commented on issue #11271: [BEAM-9624] Adds
Convert to Accumulators operator for use in combiner lifting for streaming
pipelines
URL: https://github.com/apache/beam/pull/11271#issuecomment-606693397
Java Precommit failed due to:
```
19:54:56 > Task :sdks:java:harness:compileTestJava
19:54:56
/home/jenkins/jenkins-slave/workspace/beam_PreCommit_Java_Commit/src/sdks/java/harness/src/test/java/org/apache/beam/fn/harness/CombineRunnersTest.java:350:
error: method createRunnerForPTransform in interface
PTransformRunnerFactory<T> cannot be applied to given types;
19:54:56 .createRunnerForPTransform(
19:54:56 ^
19:54:56 required:
PipelineOptions,BeamFnDataClient,BeamFnStateClient,String,PTransform,Supplier<String>,Map<String,PCollection>,Map<String,Coder>,Map<String,WindowingStrategy>,PCollectionConsumerRegistry,PTransformFunctionRegistry,PTransformFunctionRegistry,Consumer<ThrowingRunnable>,BundleSplitListener,BundleFinalizer
19:54:56 found:
PipelineOptions,<null>,<null>,String,PTransform,<null>,Map<Object,Object>,Map<Object,Object>,Map<Object,Object>,PCollectionConsumerRegistry,PTransformFunctionRegistry,PTransformFunctionRegistry,<null>,<null>
19:54:56 reason: actual and formal argument lists differ in length
19:54:56 where T is a type-variable:
19:54:56 T extends Object declared in interface PTransformRunnerFactory
```
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Issue Time Tracking
-------------------
Worklog Id: (was: 413263)
Time Spent: 50m (was: 40m)
> Combine operation should support only converting to accumulators
> ----------------------------------------------------------------
>
> Key: BEAM-9624
> URL: https://issues.apache.org/jira/browse/BEAM-9624
> Project: Beam
> Issue Type: Improvement
> Components: runner-core
> Reporter: Andrew Crites
> Assignee: Andrew Crites
> Priority: Major
> Time Spent: 50m
> Remaining Estimate: 0h
>
> For streaming pipelines, we want to be able to lift the combiner into the
> MergeBuckets without having to also do a PartialGroupByKey before the
> shuffle. We don't want to do the PGBK since it could cause non-deterministic
> results when used with some triggers.
> We propose adding a new URN for doing just the convert to accumulators step
> and adding support for it in Java/Python/Go.
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