Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/2781#discussion_r91077409
--- Diff:
flink-contrib/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/RocksDBKeyedStateBackend.java
---
@@ -994,4 +1008,82 @@ private static int
compareKeyGroupsForByteArrays(byte[] a, byte[] b, int len) {
public File getInstanceBasePath() {
return instanceBasePath;
}
+
+ /**
+ * For backwards compatibility, remove again later!
+ */
+ @Deprecated
+ private void
restoreOldSavepointKeyedState(Collection<KeyGroupsStateHandle> restoreState)
throws Exception {
+
+ if (restoreState.isEmpty()) {
+ return;
+ }
+
+ HashMap<String, RocksDBStateBackend.FinalFullyAsyncSnapshot>
namedStates =
+
InstantiationUtil.deserializeObject(restoreState.iterator().next().openInputStream(),
userCodeClassLoader);
+
+ DataInputView inputView =
namedStates.values().iterator().next().stateHandle.getState(userCodeClassLoader);
--- End diff --
Please add a safety check that the `namedStates` map has exactly one entry.
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