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https://issues.apache.org/jira/browse/FLINK-8360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16313151#comment-16313151
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ASF GitHub Bot commented on FLINK-8360:
---------------------------------------
Github user pnowojski commented on a diff in the pull request:
https://github.com/apache/flink/pull/5239#discussion_r159865180
--- Diff:
flink-core/src/main/java/org/apache/flink/util/CloseableIterator.java ---
@@ -18,11 +18,38 @@
package org.apache.flink.util;
-import org.apache.flink.annotation.Internal;
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.Iterator;
/**
- * Tagging interface for migration related classes.
+ * This interface represents an iterator that is also closeable.
+ *
+ * @param <T> type of the iterated objects.
*/
-@Internal
-public interface Migration {
+public interface CloseableIterator<T> extends Iterator<T>, Closeable {
--- End diff --
I can not find usages of this in this commit. Is it used here somehow? If
not, please remove it/extract to separate commit/move to appropriate commit.
> Implement task-local state recovery
> -----------------------------------
>
> Key: FLINK-8360
> URL: https://issues.apache.org/jira/browse/FLINK-8360
> Project: Flink
> Issue Type: New Feature
> Components: State Backends, Checkpointing
> Reporter: Stefan Richter
> Assignee: Stefan Richter
> Fix For: 1.5.0
>
>
> This issue tracks the development of recovery from task-local state. The main
> idea is to have a secondary, local copy of the checkpointed state, while
> there is still a primary copy in DFS that we report to the checkpoint
> coordinator.
> Recovery can attempt to restore from the secondary local copy, if available,
> to save network bandwidth. This requires that the assignment from tasks to
> slots is as sticky is possible.
> For starters, we will implement this feature for all managed keyed states and
> can easily enhance it to all other state types (e.g. operator state) later.
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