yanghua commented on a change in pull request #7571: [FLINK-10724] Refactor
failure handling in check point coordinator
URL: https://github.com/apache/flink/pull/7571#discussion_r276039489
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File path:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/PendingCheckpoint.java
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@@ -101,7 +100,7 @@
private final CheckpointStorageLocation targetLocation;
/** The promise to fulfill once the checkpoint has been completed. */
- private final CompletableFuture<CompletedCheckpoint>
onCompletionPromise;
+ private final CompletableFuture<CheckpointExecutionResult>
onCompletionPromise;
Review comment:
@StefanRRichter As the design document mentioned, the
`CheckpointExecutionResult ` as a data structure represents the result of
checkpoint execution (we split a full checkpoint behavior into two phases:
trigger and execution). `CheckpointExecutionResult ` will be used in
`CheckpointFailureManager` in the next PR(step 2). I know `CompletableFuture`
can represent a successful case and an exceptional case. However, in my
opinion, using `CheckpointExecutionResult` has two advantage:
* stronger constative(it contains successful checkpoint, failure exception,
failure cause)
* take concerted action with `CheckpointTriggerResult`
About your confusion, We can just use `onCompletionPromise.complete(new
CheckpointExecutionResult(...))` and do not use
`onCompletionPromise.completeExceptionally()`. It will make the implementation
and the source code more clear. What do you think?
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