Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/2707#discussion_r86111394
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/operators/GenericWriteAheadSink.java
---
@@ -77,63 +86,96 @@ public GenericWriteAheadSink(CheckpointCommitter
committer, TypeSerializer<IN> s
public void open() throws Exception {
super.open();
committer.setOperatorId(id);
-
committer.setOperatorSubtaskId(getRuntimeContext().getIndexOfThisSubtask());
committer.open();
- cleanState();
- checkpointStreamFactory =
-
getContainingTask().createCheckpointStreamFactory(this);
+
+ checkpointStreamFactory = getContainingTask()
+ .createCheckpointStreamFactory(this);
+
+ cleanRestoredHandles();
}
public void close() throws Exception {
committer.close();
}
/**
- * Saves a handle in the state.
+ * Called when a checkpoint barrier arrives.
+ * Closes any open streams to the backend and marks them as pending for
+ * committing to the final output system, e.g. Cassandra.
--- End diff --
to the final output system -> to the external backend; remove mentioning of
cassandra.
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