[SPARK-1097] ConcurrentModificationException

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.0
• Fix Version/s: 1.0.1, 1.0.2, 1.1.0
• Component/s: Spark Core
• Assignee: Raymond Liu
• Reporter: Fabrizio Milo
• Created: 16/Feb/14 14:31
• Updated: 06/Oct/14 23:06
• Resolved: 13/Jun/14 17:53

Description

14/02/16 08:18:45 WARN TaskSetManager: Loss was due to java.util.ConcurrentModificationException
java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:926)
	at java.util.HashMap$KeyIterator.next(HashMap.java:960)
	at java.util.AbstractCollection.addAll(AbstractCollection.java:341)
	at java.util.HashSet.<init>(HashSet.java:117)
	at org.apache.hadoop.conf.Configuration.<init>(Configuration.java:554)
	at org.apache.hadoop.mapred.JobConf.<init>(JobConf.java:439)
	at org.apache.spark.rdd.HadoopRDD.getJobConf(HadoopRDD.scala:110)
	at org.apache.spark.rdd.HadoopRDD$$anon$1.<init>(HadoopRDD.scala:154)
	at org.apache.spark.rdd.HadoopRDD.compute(HadoopRDD.scala:149)
	at org.apache.spark.rdd.HadoopRDD.compute(HadoopRDD.scala:64)
	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:241)
	at org.apache.spark.rdd.RDD.iterator(RDD.scala:232)
	at org.apache.spark.rdd.MappedRDD.compute(MappedRDD.scala:31)
	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:241)
	at org.apache.spark.rdd.RDD.iterator(RDD.scala:232)
	at org.apache.spark.rdd.UnionPartition.iterator(UnionRDD.scala:32)
	at org.apache.spark.rdd.UnionRDD.compute(UnionRDD.scala:72)
	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:241)
	at org.apache.spark.rdd.RDD.iterator(RDD.scala:232)
	at org.apache.spark.rdd.FlatMappedRDD.compute(FlatMappedRDD.scala:33)
	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:241)
	at org.apache.spark.rdd.RDD.iterator(RDD.scala:232)
	at org.apache.spark.rdd.MappedRDD.compute(MappedRDD.scala:31)
	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:241)
	at org.apache.spark.rdd.RDD.iterator(RDD.scala:232)
	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:161)
	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:102)
	at org.apache.spark.scheduler.Task.run(Task.scala:53)
	at org.apache.spark.executor.Executor$TaskRunner$$anonfun$run$1.apply$mcV$sp(Executor.scala:213)
	at org.apache.spark.deploy.SparkHadoopUtil.runAsUser(SparkHadoopUtil.scala:49)
	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:178)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)

Issue Links

• is duplicated by: SPARK-1388 ConcurrentModificationException in hadoop_common exposed by Spark
• is related to: SPARK-2546 Configuration object thread safety issue
• is related to: SPARK-1388 ConcurrentModificationException in hadoop_common exposed by Spark
• relates to: HADOOP-10456 Bug in Configuration.java exposed by Spark (ConcurrentModificationException)