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https://issues.apache.org/jira/browse/BEAM-2114?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Eugene Kirpichov closed BEAM-2114.
----------------------------------
Resolution: Fixed
> KafkaIO broken with CoderException
> ----------------------------------
>
> Key: BEAM-2114
> URL: https://issues.apache.org/jira/browse/BEAM-2114
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-extensions
> Reporter: Devon Meunier
> Assignee: Devon Meunier
> Fix For: First stable release
>
>
> For a KafkaIO.Read<String, String> I simply replaced {{withKeyCoder}} and
> {{withValueCoder}} with {{withKeyDeserializer}} and {{withValueDeserializer}}
> using `StringDeserializer.class` on dataflow and I receive the following
> traceback:
> {code}
> java.lang.reflect.InvocationTargetException
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:293)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.RuntimeException:
> org.apache.beam.sdk.coders.CoderException: cannot encode a null String
> at
> org.apache.beam.runners.direct.ImmutabilityCheckingBundleFactory$ImmutabilityEnforcingBundle.add(ImmutabilityCheckingBundleFactory.java:115)
> at
> org.apache.beam.runners.direct.UnboundedReadEvaluatorFactory$UnboundedReadEvaluator.processElement(UnboundedReadEvaluatorFactory.java:136)
> at
> org.apache.beam.runners.direct.TransformExecutor.processElements(TransformExecutor.java:139)
> at
> org.apache.beam.runners.direct.TransformExecutor.run(TransformExecutor.java:107)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> ... 1 more
> Caused by: org.apache.beam.sdk.coders.CoderException: cannot encode a null
> String
> at
> org.apache.beam.sdk.coders.StringUtf8Coder.encode(StringUtf8Coder.java:75)
> at
> org.apache.beam.sdk.coders.StringUtf8Coder.encode(StringUtf8Coder.java:41)
> at org.apache.beam.sdk.coders.KvCoder.encode(KvCoder.java:88)
> at
> org.apache.beam.sdk.io.kafka.KafkaRecordCoder.encode(KafkaRecordCoder.java:60)
> at
> org.apache.beam.sdk.io.kafka.KafkaRecordCoder.encode(KafkaRecordCoder.java:36)
> at
> org.apache.beam.sdk.util.CoderUtils.encodeToSafeStream(CoderUtils.java:122)
> at
> org.apache.beam.sdk.util.CoderUtils.encodeToByteArray(CoderUtils.java:106)
> at
> org.apache.beam.sdk.util.CoderUtils.encodeToByteArray(CoderUtils.java:91)
> at
> org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector.<init>(MutationDetectors.java:106)
> at
> org.apache.beam.sdk.util.MutationDetectors.forValueWithCoder(MutationDetectors.java:44)
> at
> org.apache.beam.runners.direct.ImmutabilityCheckingBundleFactory$ImmutabilityEnforcingBundle.add(ImmutabilityCheckingBundleFactory.java:113)
> ... 8 more
> {code}
> attempting to use {{readWithCoders(StringUtf8Coder.of(),
> StringUtf8Coder.of())}} instead yields:
> {code}
> java.lang.reflect.InvocationTargetException
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:293)
> at java.lang.Thread.run(Thread.java:745)
> Caused by:
> org.apache.beam.sdk.transforms.display.DisplayData$InternalBuilder$PopulateDisplayDataException:
> Error while populating display data for component:
> org.apache.beam.sdk.io.kafka.KafkaIO$TypedWithoutMetadata
> at
> org.apache.beam.sdk.transforms.display.DisplayData$InternalBuilder.include(DisplayData.java:801)
> at
> org.apache.beam.sdk.transforms.display.DisplayData$InternalBuilder.access$100(DisplayData.java:733)
> at
> org.apache.beam.sdk.transforms.display.DisplayData.from(DisplayData.java:81)
> at
> org.apache.beam.runners.direct.DisplayDataValidator.evaluateDisplayData(DisplayDataValidator.java:47)
> at
> org.apache.beam.runners.direct.DisplayDataValidator.access$100(DisplayDataValidator.java:29)
> at
> org.apache.beam.runners.direct.DisplayDataValidator$Visitor.enterCompositeTransform(DisplayDataValidator.java:56)
> at
> org.apache.beam.sdk.runners.TransformHierarchy$Node.visit(TransformHierarchy.java:479)
> at
> org.apache.beam.sdk.runners.TransformHierarchy$Node.visit(TransformHierarchy.java:483)
> at
> org.apache.beam.sdk.runners.TransformHierarchy$Node.access$400(TransformHierarchy.java:232)
> at
> org.apache.beam.sdk.runners.TransformHierarchy.visit(TransformHierarchy.java:207)
> at org.apache.beam.sdk.Pipeline.traverseTopologically(Pipeline.java:384)
> at
> org.apache.beam.runners.direct.DisplayDataValidator.validateTransforms(DisplayDataValidator.java:43)
> at
> org.apache.beam.runners.direct.DisplayDataValidator.validatePipeline(DisplayDataValidator.java:35)
> at
> org.apache.beam.runners.direct.DirectRunner.run(DirectRunner.java:265)
> at org.apache.beam.runners.direct.DirectRunner.run(DirectRunner.java:63)
> at org.apache.beam.sdk.Pipeline.run(Pipeline.java:277)
> at
> com.shopify.attribution.pipelines.StoreSessions.main(StoreSessions.java:75)
> ... 6 more
> Caused by: java.lang.RuntimeException: Unknown value type: StringUtf8Coder
> at
> org.apache.beam.sdk.transforms.display.DisplayData.item(DisplayData.java:886)
> at
> org.apache.beam.sdk.io.kafka.KafkaIO$Read.populateDisplayData(KafkaIO.java:750)
> at
> org.apache.beam.sdk.io.kafka.KafkaIO$TypedWithoutMetadata.populateDisplayData(KafkaIO.java:785)
> at
> org.apache.beam.sdk.transforms.display.DisplayData$InternalBuilder.include(DisplayData.java:794)
> ... 22 more
> {code}
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