yunfengzhou-hub commented on code in PR #22931:
URL: https://github.com/apache/flink/pull/22931#discussion_r1267760838


##########
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/CheckpointCoordinator.java:
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@@ -2079,11 +2149,19 @@ private final class ScheduledTrigger implements 
Runnable {
 
         @Override
         public void run() {
+            long currentTime = clock.relativeTimeMillis();
+            if (lastCheckpointTriggeringRelativeTime != NO_CHECKPOINT
+                    && currentTime - lastCheckpointTriggeringRelativeTime < 
baseInterval) {

Review Comment:
   With the current implementation in which 
`lastCheckpointTriggeringRelativeTime` could be `Long.MIN_VALUE`, `currentTime 
- lastCheckpointTriggeringRelativeTime` could cause stack overflow. Thus I 
treat `Long.MIN_VALUE` specially here.



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