Github user ggevay commented on a diff in the pull request:
https://github.com/apache/flink/pull/2496#discussion_r79010283
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/operators/Driver.java ---
@@ -87,4 +87,6 @@
* @throws Exception Exceptions may be forwarded.
*/
void cancel() throws Exception;
+
+ void resetForIterativeTasks() throws Exception;
--- End diff --
> You mean all drivers will now become a type of ResettableDriver?
Yes, this was the idea in my comment [1] on the Jira. I'm sorry if I wasn't
clear enough there.
The advantage of this is that you wouldn't need to add more logic in
`BatchTask`, `AbstractIterativeTask` and its descendants, because these already
handle the situation when the driver is an instance of `ResettableDriver`. (See
e.g. the beginning of `reinstantiateDriver`.)
[1]
https://issues.apache.org/jira/browse/FLINK-3322?focusedCommentId=15474531&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15474531
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