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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Work logged] (BEAM-3897) Flink runners fails on multioutput portable pipeline
Date Thu, 22 Mar 2018 00:44:00 GMT

     [ https://issues.apache.org/jira/browse/BEAM-3897?focusedWorklogId=83005&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-83005
]

ASF GitHub Bot logged work on BEAM-3897:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 22/Mar/18 00:43
            Start Date: 22/Mar/18 00:43
    Worklog Time Spent: 10m 
      Work Description: lukecwik closed pull request #4913: [BEAM-3897] Add Go wordcount example
with multi output DoFns
URL: https://github.com/apache/beam/pull/4913
 
 
   

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/sdks/go/examples/multiout/multiout.go b/sdks/go/examples/multiout/multiout.go
new file mode 100644
index 00000000000..43b480dbf5d
--- /dev/null
+++ b/sdks/go/examples/multiout/multiout.go
@@ -0,0 +1,79 @@
+// Licensed to the Apache Software Foundation (ASF) under one or more
+// contributor license agreements.  See the NOTICE file distributed with
+// this work for additional information regarding copyright ownership.
+// The ASF licenses this file to You under the Apache License, Version 2.0
+// (the "License"); you may not use this file except in compliance with
+// the License.  You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// multiout is a wordcount variation that uses a multi-outout DoFn
+// and writes 2 output files.
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"log"
+	"regexp"
+
+	"github.com/apache/beam/sdks/go/pkg/beam"
+	"github.com/apache/beam/sdks/go/pkg/beam/io/textio"
+	"github.com/apache/beam/sdks/go/pkg/beam/transforms/stats"
+	"github.com/apache/beam/sdks/go/pkg/beam/x/beamx"
+)
+
+var (
+	input = flag.String("input", "gs://apache-beam-samples/shakespeare/kinglear.txt", "File(s)
to read.")
+	small = flag.String("small", "", "Output file for small words (required).")
+	big   = flag.String("big", "", "Output file for big words (required).")
+)
+
+var wordRE = regexp.MustCompile(`[a-zA-Z]+('[a-z])?`)
+
+func splitFn(line string, big, small func(string)) {
+	for _, word := range wordRE.FindAllString(line, -1) {
+		if len(word) > 5 {
+			big(word)
+		} else {
+			small(word)
+		}
+	}
+}
+
+func formatFn(w string, c int) string {
+	return fmt.Sprintf("%s: %v", w, c)
+}
+
+func writeCounts(s beam.Scope, col beam.PCollection, filename string) {
+	counted := stats.Count(s, col)
+	textio.Write(s, filename, beam.ParDo(s, formatFn, counted))
+}
+
+func main() {
+	flag.Parse()
+	beam.Init()
+
+	if *small == "" || *big == "" {
+		log.Fatal("No outputs provided")
+	}
+
+	p := beam.NewPipeline()
+	s := p.Root()
+
+	lines := textio.Read(s, *input)
+	bcol, scol := beam.ParDo2(s, splitFn, lines)
+	writeCounts(s, bcol, *big)
+	writeCounts(s, scol, *small)
+
+	if err := beamx.Run(context.Background(), p); err != nil {
+		log.Fatalf("Failed to execute job: %v", err)
+	}
+}


 

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

    Worklog Id:     (was: 83005)
    Time Spent: 0.5h  (was: 20m)

> Flink runners fails on multioutput portable pipeline
> ----------------------------------------------------
>
>                 Key: BEAM-3897
>                 URL: https://issues.apache.org/jira/browse/BEAM-3897
>             Project: Beam
>          Issue Type: Bug
>          Components: runner-flink
>            Reporter: Henning Rohde
>            Assignee: Ben Sidhom
>            Priority: Minor
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> When trying a Go pipeline with a 2-output DoFn on the hacking branch, I see:
> [flink-runner-job-server] ERROR org.apache.beam.runners.flink.FlinkJobInvocation - Error
during job invocation go-job-1521582585657843000_-2121541089_763230090.
> java.lang.RuntimeException: Pipeline execution failed
> 	at org.apache.beam.runners.flink.FlinkRunner.run(FlinkRunner.java:134)
> 	at org.apache.beam.runners.flink.FlinkJobInvocation.lambda$start$0(FlinkJobInvocation.java:61)
> 	at org.apache.beam.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:111)
> 	at org.apache.beam.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:58)
> 	at org.apache.beam.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:75)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> 	at java.lang.Thread.run(Thread.java:748)
> Caused by: org.apache.flink.runtime.client.JobExecutionException: Job execution failed.
> 	at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$6.apply$mcV$sp(JobManager.scala:897)
> 	at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$6.apply(JobManager.scala:840)
> 	at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$6.apply(JobManager.scala:840)
> 	at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
> 	at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
> 	at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:39)
> 	at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:415)
> 	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
> 	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
> 	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> 	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> Caused by: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException:
expected one element but was: <0, 1>
> 	at org.apache.beam.runners.flink.translation.functions.FlinkExecutableStageFunction.lambda$mapPartition$0(FlinkExecutableStageFunction.java:176)
> 	at java.util.HashMap$Values.forEach(HashMap.java:980)
> 	at org.apache.beam.runners.flink.translation.functions.FlinkExecutableStageFunction.mapPartition(FlinkExecutableStageFunction.java:172)
> 	at org.apache.flink.runtime.operators.MapPartitionDriver.run(MapPartitionDriver.java:103)
> 	at org.apache.flink.runtime.operators.BatchTask.run(BatchTask.java:490)
> 	at org.apache.flink.runtime.operators.BatchTask.invoke(BatchTask.java:355)
> 	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:718)
> 	at java.lang.Thread.run(Thread.java:748)
> Caused by: java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException:
expected one element but was: <0, 1>
> 	at org.apache.beam.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:500)
> 	at org.apache.beam.util.concurrent.AbstractFuture.get(AbstractFuture.java:479)
> 	at org.apache.beam.util.concurrent.AbstractFuture$TrustedFuture.get(AbstractFuture.java:76)
> 	at org.apache.beam.sdk.fn.data.SettableFutureInboundDataClient.awaitCompletion(SettableFutureInboundDataClient.java:41)
> 	at org.apache.beam.sdk.fn.data.BeamFnDataInboundObserver.awaitCompletion(BeamFnDataInboundObserver.java:89)
> 	at org.apache.beam.runners.flink.translation.functions.FlinkExecutableStageFunction.lambda$mapPartition$0(FlinkExecutableStageFunction.java:174)
> 	... 7 more
> Caused by: java.lang.IllegalArgumentException: expected one element but was: <0, 1>
> 	at org.apache.beam.collect.Iterators.getOnlyElement(Iterators.java:322)
> 	at org.apache.beam.collect.Iterables.getOnlyElement(Iterables.java:294)
> 	at org.apache.beam.runners.flink.translation.functions.FlinkExecutableStageFunction$1$1.accept(FlinkExecutableStageFunction.java:149)
> 	at org.apache.beam.runners.flink.translation.functions.FlinkExecutableStageFunction$1$1.accept(FlinkExecutableStageFunction.java:135)
> 	at org.apache.beam.sdk.fn.data.BeamFnDataInboundObserver.accept(BeamFnDataInboundObserver.java:80)
> 	at org.apache.beam.sdk.fn.data.BeamFnDataInboundObserver.accept(BeamFnDataInboundObserver.java:32)
> 	at org.apache.beam.sdk.fn.data.BeamFnDataGrpcMultiplexer$InboundObserver.onNext(BeamFnDataGrpcMultiplexer.java:135)
> 	at org.apache.beam.sdk.fn.data.BeamFnDataGrpcMultiplexer$InboundObserver.onNext(BeamFnDataGrpcMultiplexer.java:123)
> 	at io.grpc.stub.ServerCalls$2$1.onMessage(ServerCalls.java:204)
> 	at io.grpc.internal.ServerCallImpl$ServerStreamListenerImpl.messageRead(ServerCallImpl.java:242)
> 	at io.grpc.internal.ServerImpl$JumpToApplicationThreadServerStreamListener$1.runInContext(ServerImpl.java:568)
> 	at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:52)
> 	at io.grpc.internal.SerializingExecutor$TaskRunner.run(SerializingExecutor.java:152)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> 	at java.util.co



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