igreenfield commented on a change in pull request #26624:
URL: https://github.com/apache/spark/pull/26624#discussion_r419832871
##########
File path: core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
##########
@@ -17,21 +17,106 @@
package org.apache.spark.util
+import java.util
import java.util.concurrent._
import java.util.concurrent.locks.ReentrantLock
+import com.google.common.util.concurrent.{MoreExecutors, ThreadFactoryBuilder}
import scala.concurrent.{Awaitable, ExecutionContext,
ExecutionContextExecutor, Future}
import scala.concurrent.duration.{Duration, FiniteDuration}
import scala.language.higherKinds
import scala.util.control.NonFatal
-import com.google.common.util.concurrent.ThreadFactoryBuilder
-
import org.apache.spark.SparkException
import org.apache.spark.rpc.RpcAbortException
private[spark] object ThreadUtils {
+ object MDCAwareThreadPoolExecutor {
+ def newCachedThreadPool(threadFactory: ThreadFactory): ThreadPoolExecutor
= {
+ // The values needs to be synced with `Executors.newCachedThreadPool`
+ new MDCAwareThreadPoolExecutor(
+ 0,
+ Integer.MAX_VALUE,
+ 60L,
+ TimeUnit.SECONDS,
+ new SynchronousQueue[Runnable],
+ threadFactory)
+ }
+
+ def newFixedThreadPool(nThreads: Int, threadFactory: ThreadFactory):
ThreadPoolExecutor = {
+ // The values needs to be synced with `Executors.newFixedThreadPool`
+ new MDCAwareThreadPoolExecutor(
+ nThreads,
+ nThreads,
+ 0L,
+ TimeUnit.MILLISECONDS,
+ new LinkedBlockingQueue[Runnable],
+ threadFactory)
+ }
+
+ def newSingleThreadExecutor(threadFactory: ThreadFactory): ExecutorService
= {
+ // The values needs to be synced with `Executors.newSingleThreadExecutor`
+ Executors.unconfigurableExecutorService(
+ new MDCAwareThreadPoolExecutor(
Review comment:
@viirya @HyukjinKwon
1. Yes I am confident: finalize is "best-effort" the JVM does guaranty to
run finalize also in later JVM it becomes
```
@Deprecated(since="9")
protected void finalize() throws Throwable { }
```
2. OK I will add comment even so I think in any case no one should rely on
finalize.
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