yanghua commented on a change in pull request #8410: [FLINK-11159] Allow
configuration whether to fall back to savepoints for restore
URL: https://github.com/apache/flink/pull/8410#discussion_r283316804
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/StandaloneCompletedCheckpointStore.java
##########
@@ -77,8 +79,32 @@ public void addCheckpoint(CompletedCheckpoint checkpoint)
throws Exception {
}
@Override
- public CompletedCheckpoint getLatestCheckpoint() {
- return checkpoints.isEmpty() ? null : checkpoints.getLast();
+ public CompletedCheckpoint getLatestCheckpoint(boolean
isPreferCheckpointForRecovery) {
+ if (checkpoints.isEmpty()) {
+ return null;
+ }
+
+ CompletedCheckpoint candidate = checkpoints.getLast();
Review comment:
I will give a default implementation in the `CompletedCheckpointStore ` like
this:
```java
default CompletedCheckpoint getLatestCheckpoint(boolean
isPreferCheckpointForRecovery) throws Exception {
if (getAllCheckpoints().isEmpty()) {
return null;
}
CompletedCheckpoint candidate =
getAllCheckpoints().get(getAllCheckpoints().size() - 1);
if (isPreferCheckpointForRecovery && getAllCheckpoints().size()
> 1) {
List<CompletedCheckpoint> allCheckpoints;
try {
allCheckpoints = getAllCheckpoints();
ListIterator<CompletedCheckpoint> listIterator
= allCheckpoints.listIterator(allCheckpoints.size() - 1);
while (listIterator.hasPrevious()) {
CompletedCheckpoint prev =
listIterator.previous();
if
(!prev.getProperties().isSavepoint()) {
candidate = prev;
LOG.info("Found a completed
checkpoint before the latest savepoint, will use it to recover!");
break;
}
}
} catch (Exception e) {
LOG.error("Method getAllCheckpoints caused
exception : ", e);
throw new FlinkRuntimeException(e);
}
}
return candidate;
}
```
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