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Posted to issues@spark.apache.org by "Sean Owen (JIRA)" <ji...@apache.org> on 2019/06/19 19:07:00 UTC
[jira] [Commented] (SPARK-26839) Work around classloader changes in
Java 9 for Hive isolation
[ https://issues.apache.org/jira/browse/SPARK-26839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16867912#comment-16867912 ]
Sean Owen commented on SPARK-26839:
-----------------------------------
There is still a classloader and datanucleus and Hive issue here somewhere but we could consider separating that, yes.
> Work around classloader changes in Java 9 for Hive isolation
> ------------------------------------------------------------
>
> Key: SPARK-26839
> URL: https://issues.apache.org/jira/browse/SPARK-26839
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Imran Rashid
> Assignee: Sean Owen
> Priority: Major
> Fix For: 3.0.0
>
>
> Java 9+ changed how ClassLoaders work. The two most salient points:
> The boot classloader no longer 'sees' the platform classes. A new 'platform classloader' does and should be the parent of new ClassLoaders
> The system classloader is no longer a URLClassLoader, so we can't get the URLs of JARs in its classpath
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