warrenzhu25 commented on code in PR #38231:
URL: https://github.com/apache/spark/pull/38231#discussion_r996207271
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core/src/main/scala/org/apache/spark/HeartbeatReceiver.scala:
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@@ -65,7 +65,7 @@ private[spark] case class
HeartbeatResponse(reregisterBlockManager: Boolean)
* Lives in the driver to receive heartbeats from executors..
*/
private[spark] class HeartbeatReceiver(sc: SparkContext, clock: Clock)
- extends SparkListener with ThreadSafeRpcEndpoint with Logging {
+ extends SparkListener with ThreadSafeRpcEndpoint with IsolatedRpcEndpoint
with Logging {
Review Comment:
> Do we need both `ThreadSafeRpcEndpoint` or `IsolatedRpcEndpoint`?
In theory, we only needs `IsolatedRpcEndpoint` as the default thread is 1,
but I'm not sure whether there're some logic depending on trait
`ThreadSafeRpcEndpoint`. To keep it safe, I just added new trait
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