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https://issues.apache.org/jira/browse/BEAM-9525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17072936#comment-17072936
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Alexey Romanenko commented on BEAM-9525:
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Do you know what kind of request it sends to broker in the beginning?
I can assume that it tries to fetch a list of topic(s) partitions (the source
splits that are used then to distribute a work across workers). In this case
you try to use {{withTopicPartitions()}} and provide a list of partitions. In
this case it won't fetch it from broker.
> KafkaIO attempting to make connection when uploading via Dataflow Runner
> ------------------------------------------------------------------------
>
> Key: BEAM-9525
> URL: https://issues.apache.org/jira/browse/BEAM-9525
> Project: Beam
> Issue Type: Bug
> Components: io-java-kafka
> Reporter: Ross Rothenstine
> Priority: Minor
>
> Given our Kafka is running in GCP, within a VPC that is not accessible
> outside of the VPC.
> When uploading a pipeline to GCS using the Dataflow Runner via our CI/CD
> worker, it attempts to make a connection to the broker. Our broker isn't
> available outside the VPC, so this process fails. We can remedy this by
> running a pod from within the VPC to upload, but it causes an awkward step
> within our CI/CD process.
> If there is a more elegant solution to this, such as KafkaIO taking in a
> ValueProvider for bootstrap servers.
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