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https://issues.apache.org/jira/browse/BEAM-9304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17051635#comment-17051635
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Luke Cwik commented on BEAM-9304:
---------------------------------
Longer term we should be pushing an Apache Beam BOM to resolve issues with
Maven's dependency resolution rules taking the "closest" which is based upon
the order of definition of deps.
> 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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