[
https://issues.apache.org/jira/browse/FLINK-7456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16318166#comment-16318166
]
ASF GitHub Bot commented on FLINK-7456:
---------------------------------------
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/4552#discussion_r160361957
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/netty/PartitionRequestQueue.java
---
@@ -88,6 +93,35 @@ public void run() {
});
}
+ /**
+ * Try to enqueue the reader once receiving credit notification form
the consumer or receiving
+ * non-empty reader notification from the producer. Only one thread
would trigger the actual
+ * enqueue after checking the reader's availability, so there is no
race condition here.
+ */
+ void triggerEnqueueAvailableReader(final SequenceNumberingViewReader
reader) throws Exception {
--- End diff --
I interpret this tag actually not only for methods that are *only* used by
testing, but for those where we had to increase visibility, e.g. from `private`
to `package-private` as here, to be usable in tests.
> Implement Netty sender incoming pipeline for credit-based
> ---------------------------------------------------------
>
> Key: FLINK-7456
> URL: https://issues.apache.org/jira/browse/FLINK-7456
> Project: Flink
> Issue Type: Sub-task
> Components: Network
> Reporter: zhijiang
> Assignee: zhijiang
> Fix For: 1.5.0
>
>
> This is a part of work for credit-based network flow control.
> On sender side, each subpartition view maintains an atomic integer
> {{currentCredit}} from receiver. Once receiving the messages of
> {{PartitionRequest}} and {{AddCredit}}, the {{currentCredit}} is added by
> deltas.
> Each view also maintains an atomic boolean field to mark it as registered
> available for transfer to make sure it is enqueued in handler only once. If
> the {{currentCredit}} increases from zero and there are available buffers in
> the subpartition, the corresponding view will be enqueued for transferring
> data.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
