Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/3207#discussion_r20145423
--- Diff:
core/src/main/scala/org/apache/spark/network/nio/ConnectionManager.scala ---
@@ -77,7 +77,8 @@ private[nio] class ConnectionManager(
}
private val selector = SelectorProvider.provider.openSelector()
- private val ackTimeoutMonitor = new Timer("AckTimeoutMonitor", true)
+ private val ackTimeoutMonitor = Executors.newScheduledThreadPool(2,
--- End diff --
I just checked the codes:
```Java
public ScheduledThreadPoolExecutor(int corePoolSize,
ThreadFactory threadFactory) {
super(corePoolSize, Integer.MAX_VALUE, 0, TimeUnit.NANOSECONDS,
new DelayedWorkQueue(), threadFactory);
}
```
2 is the least thread number, not the max thread number.
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