[jira] [Commented] (KAFKA-7560) Client Quota - system test failure

["Dong Lin (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-7560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16676512#comment-16676512 ] 

Dong Lin commented on KAFKA-7560:
---------------------------------

Initially I thought the test failure is related to quota logic in this test and thus I would be one of the best person to debug this test. Now it seems that the test failed because the test suite is not able to read metrics from producer using the solution developed in [https://github.com/apache/kafka/pull/4072.] More specifically, the log message shows that 50000 messages are successfully produced and consumed. But do_POST in http.py is never called and thus we have the exception shown in the Jira description. 

[~ewencp] [~apurva] could you have time to take a look since you are probably more familiar with the HTTP based approach of sending metrics here? I will also try to debug further.

> Client Quota - system test failure
> ----------------------------------
>
>                 Key: KAFKA-7560
>                 URL: https://issues.apache.org/jira/browse/KAFKA-7560
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 2.1.0
>            Reporter: Stanislav Kozlovski
>            Assignee: Dong Lin
>            Priority: Blocker
>
> The test under `kafkatest.tests.client.quota_test.QuotaTest.test_quota` fails when I run it locally. It produces the following error message:
> {code:java}
>  File "/opt/kafka-dev/tests/kafkatest/tests/client/quota_test.py", line 196, in validate     metric.value for k, metrics in producer.metrics(group='producer-metrics', name='outgoing-byte-rate', client_id=producer.client_id) for metric in metrics ValueError: max() arg is an empty sequence
> {code}
> I assume it cannot find the metric it's searching for



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