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Posted to jira@kafka.apache.org by "Chia-Ping Tsai (Jira)" <ji...@apache.org> on 2020/01/26 11:46:00 UTC
[jira] [Updated] (KAFKA-9476) Worker throws error "Scanner
SubTypeScanner was not configured" when loading invalid jar
[ https://issues.apache.org/jira/browse/KAFKA-9476?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chia-Ping Tsai updated KAFKA-9476:
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Summary: Worker throws error "Scanner SubTypeScanner was not configured" when loading invalid jar (was: the error "Scanner SubTypeScanner was not configured" caused by invalid jar when starting worker)
> Worker throws error "Scanner SubTypeScanner was not configured" when loading invalid jar
> ----------------------------------------------------------------------------------------
>
> Key: KAFKA-9476
> URL: https://issues.apache.org/jira/browse/KAFKA-9476
> Project: Kafka
> Issue Type: Bug
> Reporter: Chia-Ping Tsai
> Assignee: Chia-Ping Tsai
> Priority: Minor
> Attachments: KAFKA-9476.ut.patch
>
>
> org.reflections 0.9.12 (this [commit|https://github.com/apache/kafka/commit/a024e679c7207aee2242d72aef53dc441c60ca27] updates org.reflections from 0.9.11 to 0.9.12) has a [issue|https://github.com/ronmamo/reflections/issues/273] which throws an error when getting sub classes from invalid plugin (jar file). By contrast, org.reflections 0.9.11 does not. It is a breaking change, and Kafka Worker is impacted. The unit test in attached patch works with org.reflections 0.9.11 but it fails with org.reflections 0.9.12.
> I noticed this issue when running IT of my project with latest Kafka. It is not a critical breaking but it would be better to keep the behavior compatibility. Hence, it seems to me that we can revert the update of org.reflections and then wait for the [issue|https://github.com/ronmamo/reflections/issues/273].
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