Sean R. Owen created SPARK-36704:
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Summary: InaccessibleObjectException in Java 9+ on startup
Key: SPARK-36704
URL: https://issues.apache.org/jira/browse/SPARK-36704
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 3.2.0
Reporter: Sean R. Owen
Assignee: Sean R. Owen
A user reported this error on startup, which must be Java9+-related given the
Java-9+ exception:
{code}
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make
private java.nio.DirectByteBuffer(long,int) accessible: module java.base does
not "opens java.nio" to unnamed module @71e9ddb4
at
java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:357)
at
java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
at
java.base/java.lang.reflect.Constructor.checkCanSetAccessible(Constructor.java:188)
at
java.base/java.lang.reflect.Constructor.setAccessible(Constructor.java:181)
at org.apache.spark.unsafe.Platform.<clinit>(Platform.java:56)
{code}
Code in this section tries to open up some access to DirectBuffer by
reflection, which no longer works by default in Java 9+. We long ago tried to
handle this by dealing with the exception and avoiding reflection where not
possible. However this seems like a possible new way the same type of issue can
manifest.
We can shore up the code checking this to try to handle this apparent error
path similarly.
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