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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Work logged] (BEAM-5441) Portable Wordcount fails in GreedyPipelineFuser
Date Fri, 21 Sep 2018 17:36:00 GMT

     [ https://issues.apache.org/jira/browse/BEAM-5441?focusedWorklogId=146478&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-146478
]

ASF GitHub Bot logged work on BEAM-5441:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 21/Sep/18 17:35
            Start Date: 21/Sep/18 17:35
    Worklog Time Spent: 10m 
      Work Description: tweise closed pull request #6461: [BEAM-5441] extend primitive transform
check to find subtransform leaves
URL: https://github.com/apache/beam/pull/6461
 
 
   

This is a PR merged from a forked repository.
As GitHub hides the original diff on merge, it is displayed below for
the sake of provenance:

As this is a foreign pull request (from a fork), the diff is supplied
below (as it won't show otherwise due to GitHub magic):

diff --git a/runners/core-construction-java/src/main/java/org/apache/beam/runners/core/construction/graph/QueryablePipeline.java
b/runners/core-construction-java/src/main/java/org/apache/beam/runners/core/construction/graph/QueryablePipeline.java
index 3eed941f5a6..a0349fa2e5f 100644
--- a/runners/core-construction-java/src/main/java/org/apache/beam/runners/core/construction/graph/QueryablePipeline.java
+++ b/runners/core-construction-java/src/main/java/org/apache/beam/runners/core/construction/graph/QueryablePipeline.java
@@ -38,9 +38,11 @@
 import com.google.common.graph.MutableNetwork;
 import com.google.common.graph.Network;
 import com.google.common.graph.NetworkBuilder;
+import java.util.ArrayDeque;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Comparator;
+import java.util.Deque;
 import java.util.HashSet;
 import java.util.LinkedHashSet;
 import java.util.List;
@@ -123,15 +125,27 @@ private QueryablePipeline(Collection<String> transformIds, Components
components
   @VisibleForTesting
   static Collection<String> getPrimitiveTransformIds(RunnerApi.Components components)
{
     Collection<String> ids = new LinkedHashSet<>();
+
     for (Map.Entry<String, PTransform> transformEntry : components.getTransformsMap().entrySet())
{
       PTransform transform = transformEntry.getValue();
       boolean isPrimitive = isPrimitiveTransform(transform);
       if (isPrimitive) {
-        List<String> subtransforms = transform.getSubtransformsList();
-        if (subtransforms.isEmpty()) {
-          ids.add(transformEntry.getKey());
-        } else {
-          ids.addAll(subtransforms);
+        // Sometimes "primitive" transforms have sub-transforms (and even deeper-nested descendents),
due to runners
+        // either rewriting them in terms of runner-specific transforms, or SDKs constructing
them in terms of other
+        // underlying transforms (see https://issues.apache.org/jira/browse/BEAM-5441).
+        // We consider any "leaf" descendents of these "primitive" transforms to be the true
"primitives" that we
+        // preserve here; in the common case, this is just the "primitive" itself, which
has no descendents).
+        Deque<String> transforms = new ArrayDeque<>();
+        transforms.push(transformEntry.getKey());
+        while (!transforms.isEmpty()) {
+          String id = transforms.pop();
+          PTransform next = components.getTransformsMap().get(id);
+          List<String> subtransforms = next.getSubtransformsList();
+          if (subtransforms.isEmpty()) {
+            ids.add(id);
+          } else {
+            transforms.addAll(subtransforms);
+          }
         }
       }
     }
@@ -175,9 +189,10 @@ private static boolean isPrimitiveTransform(PTransform transform) {
         network.addEdge(transformNode, producedNode, new PerElementEdge());
         checkArgument(
             network.inDegree(producedNode) == 1,
-            "A %s should have exactly one producing %s, %s has %s",
+            "A %s should have exactly one producing %s, but found %s:\nPCollection:\n%s\nProducers:\n%s",
             PCollectionNode.class.getSimpleName(),
             PTransformNode.class.getSimpleName(),
+            network.predecessors(producedNode).size(),
             producedNode,
             network.predecessors(producedNode));
         unproducedCollections.remove(producedNode);


 

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

    Worklog Id:     (was: 146478)
    Time Spent: 3h  (was: 2h 50m)

> Portable Wordcount fails in GreedyPipelineFuser
> -----------------------------------------------
>
>                 Key: BEAM-5441
>                 URL: https://issues.apache.org/jira/browse/BEAM-5441
>             Project: Beam
>          Issue Type: New Feature
>          Components: examples-python, sdk-java-core
>    Affects Versions: 2.8.0
>            Reporter: Maximilian Michels
>            Assignee: Ryan Williams
>            Priority: Major
>              Labels: portability, portability-flink
>             Fix For: 2.8.0
>
>          Time Spent: 3h
>  Remaining Estimate: 0h
>
> The Python SDK wordcount with the PortableRunner throws the following exception:
> {noformat}
> java.lang.IllegalArgumentException: A PCollectionNode should have exactly one producing
PTransformNode, PCollectionNode{id=ref_PCollection_PCollection_26, PCollection=unique_name:
"60write/Write/WriteImpl/DoOnce/Read/Reshuffle/RemoveRandomKeys.None"
> coder_id: "ref_Coder_FastPrimitivesCoder_2"
> is_bounded: BOUNDED
> windowing_strategy_id: "ref_Windowing_Windowing_1"
> } has [PTransformNode{id=ref_AppliedPTransform_write/Write/WriteImpl/DoOnce/Read/Reshuffle_32,
transform=spec {
>   urn: "beam:transform:generic_composite:v1"
>   payload: "<Reshuffle(PTransform) label=[Reshuffle]>"
> }
> subtransforms: "ref_AppliedPTransform_write/Write/WriteImpl/DoOnce/Read/Reshuffle/AddRandomKeys_33"
> subtransforms: "ref_AppliedPTransform_write/Write/WriteImpl/DoOnce/Read/Reshuffle/ReshufflePerKey_34"
> subtransforms: "ref_AppliedPTransform_write/Write/WriteImpl/DoOnce/Read/Reshuffle/RemoveRandomKeys_41"
> inputs {
>   key: "0"
>   value: "ref_PCollection_PCollection_19"
> }
> outputs {
>   key: "None"
>   value: "ref_PCollection_PCollection_26"
> }
> unique_name: "write/Write/WriteImpl/DoOnce/Read/Reshuffle"
> }, PTransformNode{id=ref_AppliedPTransform_write/Write/WriteImpl/DoOnce/Read/Reshuffle/RemoveRandomKeys_41,
transform=spec {
>   urn: "urn:beam:transform:pardo:v1"
>   payload: "\n\317\006\n\255\006\n beam:dofn:pickled_python_info:v1\032\210\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\022\035ref_Environment_Environment_1"
> }
> inputs {
>   key: "0"
>   value: "ref_PCollection_PCollection_25"
> }
> outputs {
>   key: "None"
>   value: "ref_PCollection_PCollection_26"
> }
> unique_name: "write/Write/WriteImpl/DoOnce/Read/Reshuffle/RemoveRandomKeys"
> }]
>         at org.apache.beam.repackaged.beam_runners_core_construction_java.com.google.common.base.Preconditions.checkArgument(Preconditions.java:416)
>         at org.apache.beam.runners.core.construction.graph.QueryablePipeline.buildNetwork(QueryablePipeline.java:176)
>         at org.apache.beam.runners.core.construction.graph.QueryablePipeline.<init>(QueryablePipeline.java:119)
>         at org.apache.beam.runners.core.construction.graph.QueryablePipeline.forPrimitivesIn(QueryablePipeline.java:82)
>         at org.apache.beam.runners.core.construction.graph.GreedyPipelineFuser.<init>(GreedyPipelineFuser.java:67)
>         at org.apache.beam.runners.core.construction.graph.GreedyPipelineFuser.fuse(GreedyPipelineFuser.java:89)
>         at org.apache.beam.runners.flink.FlinkJobInvocation.runPipeline(FlinkJobInvocation.java:96)
>         at org.apache.beam.repackaged.beam_runners_flink_2.11.com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:111)
>         at org.apache.beam.repackaged.beam_runners_flink_2.11.com.google.common.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:58)
>         at org.apache.beam.repackaged.beam_runners_flink_2.11.com.google.common.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:75)
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>         at java.lang.Thread.run(Thread.java:745)
> {noformat}
> Looks like it was caused by https://github.com/apache/beam/pull/6328



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