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https://issues.apache.org/jira/browse/KAFKA-4558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15776893#comment-15776893
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Ewen Cheslack-Postava commented on KAFKA-4558:
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And this is also happening, albeit less frequently, on the 3.1.x branch:
http://confluent-kafka-0-10-1-system-test-results.s3-us-west-2.amazonaws.com/2016-12-25--001.1482666294--apache--0.10.1--8c62858/report.html
> throttling_test fails if the producer starts too fast.
> ------------------------------------------------------
>
> Key: KAFKA-4558
> URL: https://issues.apache.org/jira/browse/KAFKA-4558
> Project: Kafka
> Issue Type: Bug
> Reporter: Apurva Mehta
> Assignee: Apurva Mehta
>
> As described in https://issues.apache.org/jira/browse/KAFKA-4526, the
> throttling test will fail if the producer in the produce-consume-validate
> loop starts up before the consumer is fully initialized.
> We need to block the start of the producer until the consumer is ready to go.
> The current plan is to poll the consumer for a particular metric (like, for
> instance, partition assignment) which will act as a good proxy for successful
> initialization. Currently, we just check for the existence of a process with
> the PID, which is not a strong enough check, causing the test to fail
> intermittently.
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