LuciferYang commented on code in PR #43502:
URL: https://github.com/apache/spark/pull/43502#discussion_r1377001120
##########
common/kvstore/src/main/java/org/apache/spark/util/kvstore/LevelDBIterator.java:
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@@ -182,23 +189,21 @@ public boolean skip(long n) {
@Override
public synchronized void close() throws IOException {
- db.notifyIteratorClosed(this);
if (!closed) {
- it.close();
- closed = true;
- next = null;
+ try {
+ cleanable.clean();
Review Comment:
@zhaomin1423 Overall, we can make the close method of `RocksDBIterator` look
similar. The `notifyIteratorClosed ` method in `RocksDB` needs to be retained
(it can be refactored for reuse by `ResourceCleaner`).
```
public synchronized void close() throws IOException {
db.notifyIteratorClosed(this);
if (!closed) {
it.close();
closed = true;
next = null;
this.cancelXXX();
}
}
```
The purpose of `this.cancelXXX();` is to prevent `ResourceCleaner` from
executing repeatedly when manually closed.
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