Myasuka commented on a change in pull request #17774:
URL: https://github.com/apache/flink/pull/17774#discussion_r770198103
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File path:
flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/snapshot/RocksIncrementalSnapshotStrategy.java
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@@ -97,12 +98,23 @@
/**
* Stores the materialized sstable files from all snapshots that build the
incremental history.
+ * Used to check whether {@link PlaceholderStreamStateHandle} can be sent
or the original {@link
+ * StreamStateHandle} must be used.
*/
- @Nonnull private final SortedMap<Long, Set<StateHandleID>>
materializedSstFiles;
+ @Nonnull private final SortedMap<Long, Set<StateHandleID>>
uploadedStateIDs;
+
+ /**
+ * Last uploaded but potentially not confirmed SST files. Used if {@link
#uploadedStateIDs}
+ * doesn't contain the corresponding {@link StateHandleID}.
+ */
+ @Nonnull private final Map<StateHandleID, StreamStateHandle>
lastUploadedSstFiles;
Review comment:
You are right, the `lastUploadedSstFiles` would only be cleared after
calling `createUploadFilePaths`.
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