Myasuka commented on a change in pull request #17203:
URL: https://github.com/apache/flink/pull/17203#discussion_r709711663
##########
File path:
flink-state-backends/flink-statebackend-changelog/src/main/java/org/apache/flink/state/changelog/ChangelogKeyedStateBackend.java
##########
@@ -190,6 +194,19 @@
private final ExecutorService asyncOperationsThreadPool;
+ /**
+ * Identifies this backend. On restore, when snapshots of multiple
backends are present
+ * (downscaling case) this allows to differentiate between state mappings
of different backends.
Review comment:
Actually, upscaling case could also cause this case (such as change
parallelism 2 to 3).
##########
File path:
flink-state-backends/flink-statebackend-changelog/src/main/java/org/apache/flink/state/changelog/ChangelogKeyedStateBackend.java
##########
@@ -190,6 +194,19 @@
private final ExecutorService asyncOperationsThreadPool;
+ /**
+ * Identifies this backend. On restore, when snapshots of multiple
backends are present
+ * (downscaling case) this allows to differentiate between state mappings
of different backends.
Review comment:
Actually, upscaling case could also cause this case (such as change
parallelism from 2 to 3).
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