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https://issues.apache.org/jira/browse/SPARK-24255?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16690437#comment-16690437
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Kazuaki Ishizaki commented on SPARK-24255:
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I do not know an existing library to parse output of {{java -version}}.
You may want to know the difference between OpenJDK and Oracle JDK, as shown
[here|https://stackoverflow.com/questions/36445502/bash-command-to-check-if-oracle-or-openjdk-java-version-is-installed-on-linux]
and [there|https://qiita.com/mao172/items/42aa841280dc5a4e9924].
Output of OpenJDK 12-ea.
{code}
$ ../OpenJDK-12/java -version
openjdk version "12-ea" 2019-03-19
OpenJDK Runtime Environment (build 12-ea+20)
OpenJDK 64-Bit Server VM (build 12-ea+20, mixed mode, sharing)
$ ../OpenJDK-12/java Version
jave.specification.version=12
jave.version=12-ea
jave.version.split(".")[0]=12-ea
{code}
> Require Java 8 in SparkR description
> ------------------------------------
>
> Key: SPARK-24255
> URL: https://issues.apache.org/jira/browse/SPARK-24255
> Project: Spark
> Issue Type: Bug
> Components: SparkR
> Affects Versions: 2.3.0
> Reporter: Shivaram Venkataraman
> Assignee: Shivaram Venkataraman
> Priority: Major
> Fix For: 2.3.1, 2.4.0
>
>
> CRAN checks require that the Java version be set both in package description
> and checked during runtime.
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