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https://issues.apache.org/jira/browse/SPARK-24421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16531235#comment-16531235
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Andrew Korzhuev commented on SPARK-24421:
-----------------------------------------
If I understand this correctly, then the only deprecated JDK9+ API Spark is
using is `sun.misc.Cleaner` (while `sun.misc.Unsafe` is still accessible) in
`[common/unsafe/src/main/java/org/apache/spark/unsafe/Platform.java|https://github.com/andrusha/spark/commit/7da06d3c725169f9764225f5a29886eb56bee191#diff-c7483c7efce631c783676f014ba2b0ed]`,
which is fixable in the following way:
{code:java}
@@ -22,7 +22,7 @@
import java.lang.reflect.Method;
import java.nio.ByteBuffer;
-import sun.misc.Cleaner;
+import java.lang.ref.Cleaner;
import sun.misc.Unsafe;
public final class Platform {
@@ -169,7 +169,8 @@ public static ByteBuffer allocateDirectBuffer(int size) {
cleanerField.setAccessible(true);
long memory = allocateMemory(size);
ByteBuffer buffer = (ByteBuffer) constructor.newInstance(memory, size);
- Cleaner cleaner = Cleaner.create(buffer, () -> freeMemory(memory));
+ Cleaner cleaner = Cleaner.create();
+ cleaner.register(buffer, () -> freeMemory(memory));
cleanerField.set(buffer, cleaner);
return buffer;
{code}
[https://github.com/andrusha/spark/commit/7da06d3c725169f9764225f5a29886eb56bee191#diff-c7483c7efce631c783676f014ba2b0ed]
> sun.misc.Unsafe in JDK9+
> ------------------------
>
> Key: SPARK-24421
> URL: https://issues.apache.org/jira/browse/SPARK-24421
> Project: Spark
> Issue Type: Sub-task
> Components: Build
> Affects Versions: 2.3.0
> Reporter: DB Tsai
> Priority: Major
>
> Many internal APIs such as unsafe are encapsulated in JDK9+, see
> http://openjdk.java.net/jeps/260 for detail.
> To use Unsafe, we need to add *jdk.unsupported* to our code’s module
> declaration:
> {code:java}
> module java9unsafe {
> requires jdk.unsupported;
> }
> {code}
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