Github user adamosloizou commented on the pull request:
https://github.com/apache/spark/pull/1230#issuecomment-47508367
@vanzin The shutdown hook was my 1st attempt (it would also take care of
Ctrl-C), but I eventually went for the current solution because the hook
wouldn't exit gracefully. It bombs with a big exception:
```
uncaught exception during compilation: java.lang.AssertionError
Exception in thread "shutdownHook1" java.lang.AssertionError: assertion
failed: Tried to find '$line9' in
'/var/folders/yz/cmjy6vj1787fq0kb202qbms40000gp/T/spark-a0256dbe-b4b0-4fa4-b718-b47e8392d84c'
but it is not a directory
at
scala.reflect.io.AbstractFile.subdirectoryNamed(AbstractFile.scala:254)
at
scala.tools.nsc.backend.jvm.BytecodeWriters$class.getFile(BytecodeWriters.scala:31)
at
scala.tools.nsc.backend.jvm.BytecodeWriters$class.scala$tools$nsc$backend$jvm$BytecodeWriters$$getFile(BytecodeWriters.scala:37)
at
scala.tools.nsc.backend.jvm.BytecodeWriters$ClassBytecodeWriter$class.writeClass(BytecodeWriters.scala:89)
at
scala.tools.nsc.backend.jvm.GenASM$AsmPhase$$anon$4.writeClass(GenASM.scala:67)
at
scala.tools.nsc.backend.jvm.GenASM$JBuilder.writeIfNotTooBig(GenASM.scala:459)
at
scala.tools.nsc.backend.jvm.GenASM$JPlainBuilder.genClass(GenASM.scala:1413)
at scala.tools.nsc.backend.jvm.GenASM$AsmPhase.run(GenASM.scala:120)
at scala.tools.nsc.Global$Run.compileUnitsInternal(Global.scala:1583)
at scala.tools.nsc.Global$Run.compileUnits(Global.scala:1557)
at scala.tools.nsc.Global$Run.compileSources(Global.scala:1553)
at
org.apache.spark.repl.SparkIMain.compileSourcesKeepingRun(SparkIMain.scala:468)
at
org.apache.spark.repl.SparkIMain$ReadEvalPrint.compileAndSaveRun(SparkIMain.scala:859)
at
org.apache.spark.repl.SparkIMain$ReadEvalPrint.compile(SparkIMain.scala:815)
at
org.apache.spark.repl.SparkIMain$Request.compile$lzycompute(SparkIMain.scala:1009)
at
org.apache.spark.repl.SparkIMain$Request.compile(SparkIMain.scala:1004)
at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:644)
at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:609)
at
org.apache.spark.repl.SparkILoop.reallyInterpret$1(SparkILoop.scala:801)
at
org.apache.spark.repl.SparkILoop.interpretStartingWith(SparkILoop.scala:846)
at org.apache.spark.repl.SparkILoop.command(SparkILoop.scala:758)
at
org.apache.spark.repl.SparkILoop$$anonfun$sparkCleanUp$1.apply(SparkILoop.scala:163)
at
org.apache.spark.repl.SparkILoop$$anonfun$sparkCleanUp$1.apply(SparkILoop.scala:163)
at org.apache.spark.repl.SparkIMain.beQuietDuring(SparkIMain.scala:263)
at org.apache.spark.repl.SparkILoop.sparkCleanUp(SparkILoop.scala:162)
at
org.apache.spark.repl.SparkILoop.closeInterpreter(SparkILoop.scala:169)
at
org.apache.spark.repl.SparkILoop$$anonfun$process$1$$anonfun$apply$mcZ$sp$7.apply$mcV$sp(SparkILoop.scala:942)
at scala.sys.ShutdownHookThread$$anon$1.run(ShutdownHookThread.scala:33)
```
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