Github user aljoscha commented on a diff in the pull request:
https://github.com/apache/flink/pull/4907#discussion_r146987476
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/CheckpointCoordinator.java
---
@@ -116,6 +117,10 @@
* accessing this don't block the job manager actor and run
asynchronously. */
private final CompletedCheckpointStore completedCheckpointStore;
+ /** The root checkpoint state backend, which is responsible for
initializing the
+ * checkpoint, storing the metadata, and cleaning up the checkpoint */
+ private final StateBackend checkpointStateBackend;
--- End diff --
nit: Are there other backends than "checkpoint" backend?
---
