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https://issues.apache.org/jira/browse/SPARK-31011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17049210#comment-17049210
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Gabor Somogyi commented on SPARK-31011:
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[~holden] since you've added this recently any idea?
> Failed to register signal handler for PWR
> -----------------------------------------
>
> Key: SPARK-31011
> URL: https://issues.apache.org/jira/browse/SPARK-31011
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 3.0.0
> Reporter: Gabor Somogyi
> Priority: Major
>
> I've just tried to test something on standalone mode but the application
> fails.
> Environment:
> * Scala 2.12.10
> * Java 1.8.0_241-b07
> Steps to reproduce:
> * Compile Spark
> * ./sbin/start-master.sh
> * ./sbin/start-slave.sh spark://host:7077
> * submit an empty application
> Error:
> {code:java}
> 20/03/02 14:25:44 INFO SignalUtils: Registering signal handler for PWR
> 20/03/02 14:25:44 WARN SignalUtils: Failed to register signal handler for PWR
> java.lang.IllegalArgumentException: Unknown signal: PWR
> at sun.misc.Signal.<init>(Signal.java:143)
> at
> org.apache.spark.util.SignalUtils$.$anonfun$register$1(SignalUtils.scala:64)
> at scala.collection.mutable.HashMap.getOrElseUpdate(HashMap.scala:86)
> at org.apache.spark.util.SignalUtils$.register(SignalUtils.scala:62)
> at
> org.apache.spark.executor.CoarseGrainedExecutorBackend.onStart(CoarseGrainedExecutorBackend.scala:85)
> 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}
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