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https://issues.apache.org/jira/browse/BEAM-9304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17051682#comment-17051682
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Rui Wang commented on BEAM-9304:
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Ok guys. If you agree, I will not make this Jira block 2.20.0 RC0 cut. Please
let me know if you don't agree.
> beam-sdks-java-io-google-cloud-platform imports conflicting versions for
> BigTable and Spanner
> ---------------------------------------------------------------------------------------------
>
> Key: BEAM-9304
> URL: https://issues.apache.org/jira/browse/BEAM-9304
> Project: Beam
> Issue Type: Bug
> Components: io-java-gcp
> Affects Versions: 2.18.0
> Reporter: Knut Olav Loite
> Assignee: Chamikara Madhusanka Jayalath
> Priority: Critical
> Fix For: 2.20.0
>
> Attachments: SpannerRead.java, pom.xml
>
>
> If I include `beam-sdks-java-io-google-cloud-platform` version 2.18.0 in a
> project and try to use `SpannerIO`, the exception
> `java.lang.NoClassDefFoundError: io/opencensus/trace/Tracestate`. This seems
> to be caused by conflicting versions of `io.opencensus:opencensus-api` being
> included by the BigTable client and the Spanner client. BigTable imports
> version 0.15.0. Spanner depends on 0.18.0, but as they are at the same level
> in the dependency tree and BigTable is defined first, version 0.15.0 is used.
>
> The workaround for this issue is to exclude the BigTable client in the
> project pom in order to be able to use SpannerIO.
>
> An example pom and simple Java class are included. If the commented exclusion
> of the BigTable client is removed, the example will run without problems. The
> example will also run without problems on Beam version 2.17 without the
> exclusion.
>
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