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https://issues.apache.org/jira/browse/BEAM-4796?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16686676#comment-16686676
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Niel Markwick commented on BEAM-4796:
-------------------------------------
yeah that looks like a dependency issue.
since 2.7, you don't have to specify the protobuf and grpc dependencies
specifically, 2.9 should pull the right ones automagically.
My dependencies only needed to contain the following:
{noformat}
<dependency>
<groupId>org.apache.beam</groupId>
<artifactId>beam-sdks-java-core</artifactId>
<version>${beam.version}</version>
</dependency>
<dependency>
<groupId>org.apache.beam</groupId>
<artifactId>beam-sdks-java-io-google-cloud-platform</artifactId>
<version>${beam.version}</version>
</dependency>{noformat}
> SpannerIO waits for all input before writing
> --------------------------------------------
>
> Key: BEAM-4796
> URL: https://issues.apache.org/jira/browse/BEAM-4796
> Project: Beam
> Issue Type: Bug
> Components: io-java-gcp
> Affects Versions: 2.5.0, 2.6.0, 2.7.0, 2.8.0
> Reporter: Niel Markwick
> Assignee: Niel Markwick
> Priority: Major
> Fix For: 2.9.0
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> SpannerIO.Write waits for all input in the window to arrive before getting
> the schema:
> [https://github.com/apache/beam/blame/release-2.5.0/sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/spanner/SpannerIO.java#L841]
>
> In streaming mode, this is not an issue, but in batch mode, this causes the
> pipeline to stall until all input is read, which could be a significant
> amount of time (and temp data).
>
>
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