ERROR ContextCleaner: Error in cleaning thread - scala

Question

I have a project with spark 1.4.1 and scala 2.11, when I run it with sbt run ( sbt 0.13.12) it display an error is the following:
16/12/22 15:36:43 ERROR ContextCleaner: Error in cleaning thread
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135)
at org.apache.spark.ContextCleaner$$anonfun$org$apache$spark$ContextCleaner$$keepCleaning$1.apply$mcV$sp(ContextCleaner.scala:175)
at org.apache.spark.util.Utils$.tryOrStopSparkContext(Utils.scala:1249)
at org.apache.spark.ContextCleaner.org$apache$spark$ContextCleaner$$keepCleaning(ContextCleaner.scala:172)
at org.apache.spark.ContextCleaner$$anon$1.run(ContextCleaner.scala:67)
16/12/22 15:36:43 ERROR Utils: uncaught error in thread SparkListenerBus, stopping SparkContext
java.lang.InterruptedException
at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:996)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1303)
at java.util.concurrent.Semaphore.acquire(Semaphore.java:317)
at org.apache.spark.scheduler.LiveListenerBus$$anon$1$$anonfun$run$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(LiveListenerBus.scala:80)
at org.apache.spark.scheduler.LiveListenerBus$$anon$1$$anonfun$run$1$$anonfun$apply$mcV$sp$1.apply(LiveListenerBus.scala:79)
at org.apache.spark.scheduler.LiveListenerBus$$anon$1$$anonfun$run$1$$anonfun$apply$mcV$sp$1.apply(LiveListenerBus.scala:79)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
at org.apache.spark.scheduler.LiveListenerBus$$anon$1$$anonfun$run$1.apply$mcV$sp(LiveListenerBus.scala:78)
at org.apache.spark.util.Utils$.tryOrStopSparkContext(Utils.scala:1249)
at org.apache.spark.scheduler.LiveListenerBus$$anon$1.run(LiveListenerBus.scala:77)
Exception: sbt.TrapExitSecurityException thrown from the UncaughtExceptionHandler in thread "run-main-0"
16/12/22 15:36:43 ERROR ContextCleaner: Error in cleaning thread
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135)
at org.apache.spark.ContextCleaner$$anonfun$org$apache$spark$ContextCleaner$$keepCleaning$1.apply$mcV$sp(ContextCleaner.scala:175)
at org.apache.spark.util.Utils$.tryOrStopSparkContext(Utils.scala:1249)
at org.apache.spark.ContextCleaner.org$apache$spark$ContextCleaner$$keepCleaning(ContextCleaner.scala:172)
at org.apache.spark.ContextCleaner$$anon$1.run(ContextCleaner.scala:67)
Knowing that I stopped the object of spark (sc.stop() ) at the end of my code, but I still got the same error. May be there is insufficient memory, I changed the configuration to a executor memory than the driver memory, in the following:
val conf = new SparkConf().setAppName("Simple project").setMaster("local[*]").set("spark.executor.memory", "2g")
val sc = new SparkContext(conf)
But always I have the same error.
Can you help me by an ideas, where's exactly my error, in the configuration of the memory or another thing ?

Answer 1

Knowing that I stopped the object of spark (sc.stop() ) at the end of my code, but I still got the same error.
Stopping the spark context (sc.stop()) without waiting for the job to complete could be the reason for this. Make sure you call sc.stop() only after calling all your spark actions.