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Posted to jira@kafka.apache.org by "Kirk True (Jira)" <ji...@apache.org> on 2021/07/06 00:13:00 UTC
[jira] [Commented] (KAFKA-12879) Compatibility break in
Admin.listOffsets()
[ https://issues.apache.org/jira/browse/KAFKA-12879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17375067#comment-17375067 ]
Kirk True commented on KAFKA-12879:
-----------------------------------
I'm trying to understand the reason to _*not*_ throw the {{UnknownTopicOrPartitionException}} if it determines that a topic doesn't exist 🤔
Are meta data operations in Kafka (e.g. topic creation) atomic across the cluster? Or is the admin client code retrying optimistically, hoping that the topic will soon be available across the cluster?
> Compatibility break in Admin.listOffsets()
> ------------------------------------------
>
> Key: KAFKA-12879
> URL: https://issues.apache.org/jira/browse/KAFKA-12879
> Project: Kafka
> Issue Type: Bug
> Components: admin
> Affects Versions: 2.8.0, 2.7.1, 2.6.2
> Reporter: Tom Bentley
> Assignee: Kirk True
> Priority: Major
>
> KAFKA-12339 incompatibly changed the semantics of Admin.listOffsets(). Previously it would fail with {{UnknownTopicOrPartitionException}} when a topic didn't exist. Now it will (eventually) fail with {{TimeoutException}}. It seems this was more or less intentional, even though it would break code which was expecting and handling the {{UnknownTopicOrPartitionException}}. A workaround is to use {{retries=1}} and inspect the cause of the {{TimeoutException}}, but this isn't really suitable for cases where the same Admin client instance is being used for other calls where retries is desirable.
> Furthermore as well as the intended effect on {{listOffsets()}} it seems that the change could actually affect other methods of Admin.
> More generally, the Admin client API is vague about which exceptions can propagate from which methods. This means that it's not possible to say, in cases like this, whether the calling code _should_ have been relying on the {{UnknownTopicOrPartitionException}} or not.
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