curcur commented on code in PR #20313:
URL: https://github.com/apache/flink/pull/20313#discussion_r934351551
##########
flink-runtime/src/main/java/org/apache/flink/runtime/state/SharedStateRegistryImpl.java:
##########
@@ -365,4 +401,18 @@ public String toString() {
return "EmptyDiscardStateObject{" + stateHandleID + '}';
}
}
+
+ private boolean preventsDiscardingCreatedCheckpoint(SharedStateEntry
entry) {
+ // explicitly set by the backend, e.g. private state is reused
Review Comment:
add that more documentation here: currently, changelog statebackend sets
this to true, and uses delayed deletion
##########
flink-runtime/src/main/java/org/apache/flink/runtime/state/SharedStateRegistryImpl.java:
##########
@@ -365,4 +401,18 @@ public String toString() {
return "EmptyDiscardStateObject{" + stateHandleID + '}';
}
}
+
+ private boolean preventsDiscardingCreatedCheckpoint(SharedStateEntry
entry) {
+ // explicitly set by the backend, e.g. private state is reused
+ if (entry.preventDiscardingCreatedCheckpoint) {
+ return true;
+ }
+ // with NO_SHARING strategy, shared state, if any, is bundled inside
the checkpoint folder
+ // noinspection RedundantIfStatement
Review Comment:
same here, add comments saying NO_SHARING indicates recover from a
savepoints, and explain why delay deletion is needd.
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