srowen commented on a change in pull request #22993: [SPARK-24421][BUILD][CORE]
Accessing sun.misc.Cleaner in JDK11
URL: https://github.com/apache/spark/pull/22993#discussion_r244661604
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File path: common/unsafe/src/main/java/org/apache/spark/unsafe/Platform.java
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@@ -159,18 +213,18 @@ public static long reallocateMemory(long address, long
oldSize, long newSize) {
* MaxDirectMemorySize limit (the default limit is too low and we do not
want to require users
* to increase it).
*/
- @SuppressWarnings("unchecked")
public static ByteBuffer allocateDirectBuffer(int size) {
try {
- Class<?> cls = Class.forName("java.nio.DirectByteBuffer");
- Constructor<?> constructor = cls.getDeclaredConstructor(Long.TYPE,
Integer.TYPE);
- constructor.setAccessible(true);
- Field cleanerField = cls.getDeclaredField("cleaner");
- cleanerField.setAccessible(true);
long memory = allocateMemory(size);
- ByteBuffer buffer = (ByteBuffer) constructor.newInstance(memory, size);
- Cleaner cleaner = Cleaner.create(buffer, () -> freeMemory(memory));
- cleanerField.set(buffer, cleaner);
+ ByteBuffer buffer = (ByteBuffer) DBB_CONSTRUCTOR.newInstance(memory,
size);
+ if (CLEANER_CREATE_METHOD != null) {
Review comment:
See https://github.com/apache/spark/pull/23424 ; I now think this was an
error.
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