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Posted to issues@spark.apache.org by "Dongjoon Hyun (JIRA)" <ji...@apache.org> on 2019/08/16 09:31:00 UTC
[jira] [Closed] (SPARK-28110) on JDK11, IsolatedClientLoader must
be able to load java.sql classes
[ https://issues.apache.org/jira/browse/SPARK-28110?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dongjoon Hyun closed SPARK-28110.
---------------------------------
> on JDK11, IsolatedClientLoader must be able to load java.sql classes
> --------------------------------------------------------------------
>
> Key: SPARK-28110
> URL: https://issues.apache.org/jira/browse/SPARK-28110
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Imran Rashid
> Priority: Major
>
> This might be very specific to my fork & a kind of weird system setup I'm working on, I haven't completely confirmed yet, but I wanted to report it anyway in case anybody else sees this.
> When I try to do anything which touches the metastore on java11, I immediately get errors from IsolatedClientLoader that it can't load anything in java.sql. eg.
> {noformat}
> scala> spark.sql("show tables").show()
> java.lang.ClassNotFoundException: java.lang.NoClassDefFoundError: java/sql/SQLTransientException when creating Hive client using classpath: file:/home/systest/jdk-11.0.2/, ...
> ...
> Caused by: java.lang.ClassNotFoundException: java.sql.SQLTransientException
> at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)
> at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
> at org.apache.spark.sql.hive.client.IsolatedClientLoader$$anon$1.doLoadClass(IsolatedClientLoader.scala:230)
> at org.apache.spark.sql.hive.client.IsolatedClientLoader$$anon$1.loadClass(IsolatedClientLoader.scala:219)
> at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
> {noformat}
> After a bit of debugging, I also discovered that the {{rootClassLoader}} is {{null}} in {{IsolatedClientLoader}}. I think this would work if either {{rootClassLoader}} could load those classes, or if {{isShared()}} was changed to allow any class starting with "java." (I'm not sure why it only allows "java.lang" and "java.net" currently.)
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