duongkame opened a new pull request, #4461:
URL: https://github.com/apache/ozone/pull/4461
## What changes were proposed in this pull request?
RocksObject leaks in snapshot.
```
2023-03-23 09:44:20,288 [Finalizer] WARN managed.ManagedRocksObjectUtils
(ManagedRocksObjectUtils.java:assertClosed(54)) - RocksIterator is not closed
properly
StackTrace for unclosed instance:
org.apache.hadoop.hdds.utils.db.managed.ManagedObject.<init>(ManagedObject.java:35)
org.apache.hadoop.hdds.utils.db.managed.ManagedRocksIterator.<init>(ManagedRocksIterator.java:28)
org.apache.hadoop.hdds.utils.db.managed.ManagedRocksIterator.managed(ManagedRocksIterator.java:32)
org.apache.hadoop.hdds.utils.db.RocksDatabase.newIterator(RocksDatabase.java:757)
org.apache.hadoop.hdds.utils.db.RDBTable.iterator(RDBTable.java:167)
org.apache.hadoop.hdds.utils.db.TypedTable.iterator(TypedTable.java:286)
org.apache.hadoop.ozone.om.SnapshotChainManager.loadFromSnapshotInfoTable(SnapshotChainManager.java:266)
org.apache.hadoop.ozone.om.SnapshotChainManager.<init>(SnapshotChainManager.java:63)
org.apache.hadoop.ozone.om.OmMetadataManagerImpl.start(OmMetadataManagerImpl.java:480)
org.apache.hadoop.ozone.om.OmMetadataManagerImpl.<init>(OmMetadataManagerImpl.java:319)
org.apache.hadoop.ozone.om.OzoneManager.instantiateServices(OzoneManager.java:747)
org.apache.hadoop.ozone.om.OzoneManager.<init>(OzoneManager.java:628)
org.apache.hadoop.ozone.om.OzoneManager.createOm(OzoneManager.java:713)
org.apache.hadoop.ozone.MiniOzoneHAClusterImpl$Builder.createOMService(MiniOzoneHAClusterImpl.java:518)
org.apache.hadoop.ozone.MiniOzoneHAClusterImpl$Builder.build(MiniOzoneHAClusterImpl.java:426)
org.apache.hadoop.ozone.om.TestOmSnapshot.init(TestOmSnapshot.java:175)
org.apache.hadoop.ozone.om.TestOmSnapshot.<init>(TestOmSnapshot.java:144)
```
```
2023-03-23 10:10:20,868 [Finalizer] WARN managed.ManagedRocksObjectUtils
(ManagedRocksObjectUtils.java:assertClosed(54)) - RocksIterator is not closed
properly
StackTrace for unclosed instance:
org.apache.hadoop.hdds.utils.db.managed.ManagedObject.<init>(ManagedObject.java:35)
org.apache.hadoop.hdds.utils.db.managed.ManagedRocksIterator.<init>(ManagedRocksIterator.java:28)
org.apache.hadoop.ozone.om.snapshot.RocksDbPersistentList.iterator(RocksDbPersistentList.java:85)
org.apache.hadoop.ozone.om.snapshot.SnapshotDiffManager.addToReport(SnapshotDiffManager.java:658)
org.apache.hadoop.ozone.om.snapshot.SnapshotDiffManager.generateDiffReport(SnapshotDiffManager.java:612)
org.apache.hadoop.ozone.om.snapshot.SnapshotDiffManager.generateSnapshotDiffReport(SnapshotDiffManager.java:343)
org.apache.hadoop.ozone.om.snapshot.SnapshotDiffManager.getSnapshotDiffReport(SnapshotDiffManager.java:196)
org.apache.hadoop.ozone.om.OmSnapshotManager.getSnapshotDiffReport(OmSnapshotManager.java:455)
org.apache.hadoop.ozone.om.OzoneManager.snapshotDiff(OzoneManager.java:4493)
org.apache.hadoop.ozone.protocolPB.OzoneManagerRequestHandler.snapshotDiff(OzoneManagerRequestHandler.java:1223)
org.apache.hadoop.ozone.protocolPB.OzoneManagerRequestHandler.handleReadRequest(OzoneManagerRequestHandler.java:300)
org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.submitReadRequestToOM(OzoneManagerProtocolServerSideTranslatorPB.java:223)
org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.processRequest(OzoneManagerProtocolServerSideTranslatorPB.java:177)
org.apache.hadoop.hdds.server.OzoneProtocolMessageDispatcher.processRequest(OzoneProtocolMessageDispatcher.java:87)
```
## What is the link to the Apache JIRA
https://issues.apache.org/jira/browse/HDDS-8251
## How was this patch tested?
No more leak warnings when running `TestOmSnapshot` integration test.
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