[jira] [Commented] (BEAM-12674) SqlTransform IllegalArgumentException: key already present: SchemaCoder

["Beam JIRA Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-12674?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17427256#comment-17427256 ] 

Beam JIRA Bot commented on BEAM-12674:
--------------------------------------

This issue was marked "stale-P2" and has not received a public comment in 14 days. It is now automatically moved to P3. If you are still affected by it, you can comment and move it back to P2.

> SqlTransform IllegalArgumentException: key already present: SchemaCoder
> -----------------------------------------------------------------------
>
>                 Key: BEAM-12674
>                 URL: https://issues.apache.org/jira/browse/BEAM-12674
>             Project: Beam
>          Issue Type: Improvement
>          Components: cross-language, sdk-py-core
>            Reporter: Ning
>            Priority: P3
>
> When defining a SqlTransform joining two PCollections with the same Row schema, the expansion service throws below exception:
> {code:java}
> RuntimeError: java.lang.IllegalArgumentException: key already present: SchemaCoder<Schema: Fields:
> Field{name=number, description=, type=INT64 NOT NULL, options={{}}}
> Encoding positions:
> {number=0}
> Options:{{}}UUID: 7380513f-09ca-4209-a770-50bcfb82c3e4  UUID: 7380513f-09ca-4209-a770-50bcfb82c3e4 delegateCoder: org.apache.beam.sdk.coders.Coder$ByteBuddy$6yeAkNko@2dd884d
> 	at org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.HashBiMap.putInverse(HashBiMap.java:315)
> 	at org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.HashBiMap.access$800(HashBiMap.java:59)
> 	at org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.HashBiMap$Inverse.put(HashBiMap.java:590)
> 	at java.util.AbstractMap.putAll(AbstractMap.java:281)
> 	at org.apache.beam.runners.core.construction.SdkComponents.create(SdkComponents.java:99)
> 	at org.apache.beam.runners.core.construction.RehydratedComponents.getSdkComponents(RehydratedComponents.java:184)
> 	at org.apache.beam.sdk.expansion.service.ExpansionService.expand(ExpansionService.java:479)
> 	at org.apache.beam.sdk.expansion.service.ExpansionService.expand(ExpansionService.java:546)
> 	at org.apache.beam.model.expansion.v1.ExpansionServiceGrpc$MethodHandlers.invoke(ExpansionServiceGrpc.java:219)
> 	at org.apache.beam.vendor.grpc.v1p36p0.io.grpc.stub.ServerCalls$UnaryServerCallHandler$UnaryServerCallListener.onHalfClose(ServerCalls.java:182)
> 	at org.apache.beam.vendor.grpc.v1p36p0.io.grpc.internal.ServerCallImpl$ServerStreamListenerImpl.halfClosed(ServerCallImpl.java:331)
> 	at org.apache.beam.vendor.grpc.v1p36p0.io.grpc.internal.ServerImpl$JumpToApplicationThreadServerStreamListener$1HalfClosed.runInContext(ServerImpl.java:797)
> 	at org.apache.beam.vendor.grpc.v1p36p0.io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
> 	at org.apache.beam.vendor.grpc.v1p36p0.io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> 	at java.lang.Thread.run(Thread.java:748)
> {code}
> The code to produce the error:
> {code:python}
> p = beam.Pipeline()
> numbers = (p | beam.Create(range(10))
>                         | beam.Map(lambda x: beam.Row(number=x)))
> numbers2 = (p | beam.Create(range(5,15))
>                           | beam.Map(lambda x: beam.Row(number=x)))
> common_numbers = {'numbers': numbers, 'numbers2': numbers2} | 
>     beam.transforms.sql.SqlTransform("""
>         SELECT * FROM numbers JOIN numbers2 ON numbers.number = numbers2.number
>     """)
> {code}
> However, if we define the Row schema of `numbers2` to a different schema such as `beam.Row(number2=x)`. Then make the join `ON numbers.number = numbers2.number2`. The transform can be successfully applied. The pipeline can also be executed successfully later.



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