Marcelo Vanzin created SPARK-3647:
-------------------------------------
Summary: Shaded Guava patch causes access issues with package
private classes
Key: SPARK-3647
URL: https://issues.apache.org/jira/browse/SPARK-3647
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 1.2.0
Reporter: Marcelo Vanzin
Priority: Critical
The patch that introduced shading to Guava (SPARK-2848) tried to maintain
backwards compatibility in the Java API by not relocating the "Optional" class.
That causes problems when that class references package private members in the
Absent and Present classes, which are now in a different package:
{noformat}
Exception in thread "main" java.lang.IllegalAccessError: tried to access class
org.spark-project.guava.common.base.Present from class
com.google.common.base.Optional
at com.google.common.base.Optional.of(Optional.java:86)
at
org.apache.spark.api.java.JavaUtils$.optionToOptional(JavaUtils.scala:25)
at
org.apache.spark.api.java.JavaSparkContext.getSparkHome(JavaSparkContext.scala:542)
{noformat}
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