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Posted to jira@kafka.apache.org by "Jagadesh Adireddi (JIRA)" <ji...@apache.org> on 2018/04/09 15:42:00 UTC

[jira] [Assigned] (KAFKA-6749) TopologyTestDriver fails when topoloy under test uses EXACTLY_ONCE

     [ https://issues.apache.org/jira/browse/KAFKA-6749?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jagadesh Adireddi reassigned KAFKA-6749:
----------------------------------------

    Assignee: Jagadesh Adireddi

> TopologyTestDriver fails when topoloy under test uses EXACTLY_ONCE
> ------------------------------------------------------------------
>
>                 Key: KAFKA-6749
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6749
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>    Affects Versions: 1.1.0
>            Reporter: Frederic Arno
>            Assignee: Jagadesh Adireddi
>            Priority: Minor
>              Labels: newbie
>
> Stream processing topologies which are configured to use {{EXACTLY_ONCE}} processing guarantee cannot be tested with the {{TopologyTestDriver}}. Tests usually crash with {{java.lang.IllegalStateException: MockProducer hasn't been initialized for transactions}} within the second call to {{TopologyTestDriver.pipeInput()}}, the first call works fine.
> Changing the processing guarantee to {{AT_LEAST_ONCE}} makes tests pass.
> This is a problem because it is expected that proper processor topologies can be successfully tested using {{TopologyTestDriver}}, however {{TopologyTestDriver}} can't handle {{EXACTLY_ONCE}} and crashes during tests. To a developer, this usually means that there is something wrong with their processor topologies.
> Kafka developpers can reproduce this by adding:
> {code:java}
> put(StreamsConfig.PROCESSING_GUARANTEE_CONFIG, StreamsConfig.EXACTLY_ONCE);{code}
> to line 88 of TopologyTestDriverTest: streams/test-utils/src/test/java/org/apache/kafka/streams/TopologyTestDriverTest.java
> Originally [reported on the ML|http://mail-archives.apache.org/mod_mbox/kafka-users/201804.mbox/%3C54ab29ad-44e1-35bd-9c16-c1d8d68a88db%40gmail.com%3E].



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