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https://issues.apache.org/jira/browse/NIFI-5175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16493299#comment-16493299
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Martin Payne commented on NIFI-5175:
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Using "--add-modules=java.xml.bind" is only really a short term solution
because [Java EE modules are being removed altogether in Java
11|http://openjdk.java.net/jeps/320]. It would be more forwards and backwards
compatible to either include the JAXB jars on NiFi's classpath, or include the
JAXB jars in the nars which require JAXB. It also sounds more user friendly
than the user potentially having to make configuration changes to get NiFi to
work with Java 10.
> NiFi built with Java 1.8 needs to run on Java 9
> -----------------------------------------------
>
> Key: NIFI-5175
> URL: https://issues.apache.org/jira/browse/NIFI-5175
> Project: Apache NiFi
> Issue Type: Sub-task
> Reporter: Jeff Storck
> Assignee: Jeff Storck
> Priority: Major
> Fix For: 1.7.0
>
>
> The following issues have been encountered while attempting to run a Java
> 1.8-built NiFi on Java 9:
> ||Issue||Solution||Status||
> |JAXB classes cannot be found on the classpath|Add
> "--add-modules=java.xml.bind" to the commant that starts NiFi|Done|
> |NiFI boostrap not able to determine PID, restarts nifi after nifi.sh
> stop|Detect if NiFi is running on Java 9, and reflectively invoke
> Process.pid(), which was newly added to the Process API in Java 9|Done|
>
> ----
>
> ||Unaddressed issues/warnings with NiFi compiled on Java 1.8 running on Java
> 9+||Description||Solution||
> |WARNING: An illegal reflective access operation has occurred
> ..._specific class usage snipped_...
> WARNING: Use --illegal-access=warn to enable warnings of further illegal
> reflective access operations
> WARNING: All illegal access operations will be denied in a future
> release|Reflective invocations are common in the code used in NiFi and its
> dependencies in Java 1.8|Full compliant migration to Java 9 and use
> dependencies that are Java 9 compliant|
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