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https://issues.apache.org/jira/browse/SPARK-31946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17130059#comment-17130059
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Jungtaek Lim commented on SPARK-31946:
--------------------------------------
Oh I see what you meant. Thanks for making it clear. I'm not sure we consider
MacOS as the OS for production usage on cluster though. Given the feature is
started to support the case on k8s, which MacOS is already out of support
there, and for non-k8s case I'm wondering we have enough use cases on using
MacOS as production.
> Failed to register SIGPWR handler on MacOS
> ------------------------------------------
>
> Key: SPARK-31946
> URL: https://issues.apache.org/jira/browse/SPARK-31946
> Project: Spark
> Issue Type: Sub-task
> Components: Spark Core
> Affects Versions: 3.1.0
> Environment: macOS 10.14.6
> Reporter: wuyi
> Priority: Major
>
>
> {code:java}
> 20/06/09 22:54:54 WARN SignalUtils: Failed to register SIGPWR handler -
> disabling decommission feature.
> java.lang.IllegalArgumentException: Unknown signal: PWR
> at sun.misc.Signal.<init>(Signal.java:143)
> at
> org.apache.spark.util.SignalUtils$.$anonfun$register$1(SignalUtils.scala:83)
> at scala.collection.mutable.HashMap.getOrElseUpdate(HashMap.scala:86)
> at org.apache.spark.util.SignalUtils$.register(SignalUtils.scala:81)
> at
> org.apache.spark.executor.CoarseGrainedExecutorBackend.onStart(CoarseGrainedExecutorBackend.scala:86)
> at org.apache.spark.rpc.netty.Inbox.$anonfun$process$1(Inbox.scala:120)
> at org.apache.spark.rpc.netty.Inbox.safelyCall(Inbox.scala:203)
> at org.apache.spark.rpc.netty.Inbox.process(Inbox.scala:100)
> at
> org.apache.spark.rpc.netty.MessageLoop.org$apache$spark$rpc$netty$MessageLoop$$receiveLoop(MessageLoop.scala:75)
> at
> org.apache.spark.rpc.netty.MessageLoop$$anon$1.run(MessageLoop.scala:41)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> {code}
> Seem like MacOS is *POSIX* compliant. But SIGPWR is not specified in the
> *POSIX* specification. See [https://en.wikipedia.org/wiki/Signal_(IPC)#SIGPWR]
>
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