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https://issues.apache.org/jira/browse/BEAM-2837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16441299#comment-16441299
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Mairbek Khadikov commented on BEAM-2837:
----------------------------------------
It seems like it is still possible to run into the version conflict, when
google-cloud-dataflow-java-sdk-all is included.
> Writing To Spanner From Google Cloud DataFlow - Failure
> -------------------------------------------------------
>
> Key: BEAM-2837
> URL: https://issues.apache.org/jira/browse/BEAM-2837
> Project: Beam
> Issue Type: Bug
> Components: runner-dataflow
> Affects Versions: 2.1.0
> Environment: Google Cloud DataFlow
> Reporter: Al Yaros
> Assignee: Mairbek Khadikov
> Priority: Major
> Fix For: 2.2.0
>
>
> Simple Java Program That reads from Pub\Sub and Writes to Spanner Fails with
> cryptic error message.
> Simple Program to Demonstrate the Error:
> [https://github.com/alyaros/ExamplePubSubToSpannerViaDataFlow]
> {code:java}
> *Caused by: org.apache.beam.sdk.util.UserCodeException:
> java.lang.NoClassDefFoundError: Could not initialize class
> com.google.cloud.spanner.spi.v1.SpannerErrorInterceptor
>
> org.apache.beam.sdk.util.UserCodeException.wrap(UserCodeException.java:36)
> org.apache.beam.sdk.io.
> gcp.spanner.SpannerWriteGroupFn$DoFnInvoker.invokeSetup(Unknown Source)
>
> com.google.cloud.dataflow.worker.DoFnInstanceManagers$ConcurrentQueueInstanceManager.deserializeCopy(DoFnInstanceManagers.java:66)
>
> com.google.cloud.dataflow.worker.DoFnInstanceManagers$ConcurrentQueueInstanceManager.peek(DoFnInstanceManagers.java:48)
>
> com.google.cloud.dataflow.worker.UserParDoFnFactory.create(UserParDoFnFactory.java:104)
>
> com.google.cloud.dataflow.worker.DefaultParDoFnFactory.create(DefaultParDoFnFactory.java:66)
>
> com.google.cloud.dataflow.worker.MapTaskExecutorFactory.createParDoOperation(MapTaskExecutorFactory.java:360)
>
> com.google.cloud.dataflow.worker.MapTaskExecutorFactory$3.typedApply(MapTaskExecutorFactory.java:271)
>
> com.google.cloud.dataflow.worker.MapTaskExecutorFactory$3.typedApply(MapTaskExecutorFactory.java:253)
>
> com.google.cloud.dataflow.worker.graph.Networks$TypeSafeNodeFunction.apply(Networks.java:55)
>
> com.google.cloud.dataflow.worker.graph.Networks$TypeSafeNodeFunction.apply(Networks.java:43)
>
> com.google.cloud.dataflow.worker.graph.Networks.replaceDirectedNetworkNodes(Networks.java:78)
>
> com.google.cloud.dataflow.worker.MapTaskExecutorFactory.create(MapTaskExecutorFactory.java:142)
>
> com.google.cloud.dataflow.worker.StreamingDataflowWorker.process(StreamingDataflowWorker.java:925)
>
> com.google.cloud.dataflow.worker.StreamingDataflowWorker.access$800(StreamingDataflowWorker.java:133)
>
> com.google.cloud.dataflow.worker.StreamingDataflowWorker$7.run(StreamingDataflowWorker.java:771)
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> java.lang.Thread.run(Thread.java:745)*
> {code}
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