maobaolong opened a new pull request, #2132:
URL: https://github.com/apache/incubator-uniffle/pull/2132
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### What changes were proposed in this pull request?
Server send heartbeat to coordinator while receive unregister shuffle
request.
### Why are the changes needed?
Without this PR, server could not heartbeat the updated app info after
unregister this app, so the coordinator and dashboard could display the outdate
information.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
Tested by a tiny spark job executed by spark-shell
- shell command line
```shell
bin/spark-shell --master spark://localhost:7077 --deploy-mode client
--conf spark.rss.coordinator.quorum=localhost:19999 --conf
spark.shuffle.manager=org.apache.spark.shuffle.RssShuffleManager --conf
spark.rss.storage.type=LOCALFILE --conf
spark.serializer=org.apache.spark.serializer.KryoSerializer --conf
spark.rss.test.mode.enable=true --conf spark.rss.client.type=GRPC_NETTY --conf
spark.default.parallelism=16 -i test.scala
```
- test.scala
```scala
val data = sc.parallelize(Seq(("A", 1), ("B", 2), ("C", 3), ("A", 4), ("B",
5), ("A", 6), ("A", 7),("A", 7), ("A", 7), ("A", 7), ("A", 7), ("A", 7), ("A",
7), ("A", 7), ("A", 7), ("A", 7), ("A", 7), ("A", 7), ("A", 7)));
val result = data.reduceByKey(_ + _);
result.collect().foreach(println);
System.exit(0);
```
<img width="2540" alt="image"
src="https://github.com/user-attachments/assets/bbd7c534-9fea-4e86-ba5e-84dff3d9c98c";>
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