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https://issues.apache.org/jira/browse/NIFI-10031?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Handermann updated NIFI-10031:
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Status: Patch Available (was: In Progress)
> Downgrade Jakarta Mail to 1.6.7 in Bootstrap
> --------------------------------------------
>
> Key: NIFI-10031
> URL: https://issues.apache.org/jira/browse/NIFI-10031
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 1.16.1
> Reporter: David Handermann
> Assignee: David Handermann
> Priority: Major
> Fix For: 1.17.0, 1.16.2
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Jakarta Mail 2 included changes to use the new API and implementation classes
> with the {{jakarta}} namespace instead of the {{javax}} namespace. Jakarta
> Mail 2 depends on Jakarta Activation 2, which includes the same namespaces
> changes. This works for extension components, but creates problems at runtime
> when running on Java 11 and higher since NiFi includes dependencies on JAXB 2
> runtime libraries that require Jakarta Activation 1. The NiFi startup process
> includes the JAXB 2 runtime libraries when running on Java 11, resulting in
> class conflicts due to incompatible versions of Jakarta Activation 1 and 2.
> Upgrading JAXB 2 to JAXB 3 requires API and implementation changes that
> impact a large number of classes, which should be addressed separately. To
> maintain compatibility with JAXB 2 on Java 11 and higher, Jakarta Mail 2
> should be downgraded to Jakarta Mail 1 for the {{nifi-bootstrap}} module and
> the Email Notification Service.
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