I'm running a small job on a cluster with 15G of mem and 8G of disk per machine.
The job always get into a deadlock where the last error message is: java.io.IOException: No space left on device at java.io.FileOutputStream.writeBytes(Native Method) at java.io.FileOutputStream.write(FileOutputStream.java:345) at org.apache.spark.storage.DiskBlockObjectWriter$TimeTrackingOutputStream$$anonfun$write$3.apply$mcV$sp(BlockObjectWriter.scala:86) at org.apache.spark.storage.DiskBlockObjectWriter.org$apache$spark$storage$DiskBlockObjectWriter$$callWithTiming(BlockObjectWriter.scala:221) at org.apache.spark.storage.DiskBlockObjectWriter$TimeTrackingOutputStream.write(BlockObjectWriter.scala:86) at java.io.BufferedOutputStream.write(BufferedOutputStream.java:122) at org.xerial.snappy.SnappyOutputStream.dumpOutput(SnappyOutputStream.java:300) at org.xerial.snappy.SnappyOutputStream.rawWrite(SnappyOutputStream.java:247) at org.xerial.snappy.SnappyOutputStream.write(SnappyOutputStream.java:107) at java.io.ObjectOutputStream$BlockDataOutputStream.drain(ObjectOutputStream.java:1876) at java.io.ObjectOutputStream$BlockDataOutputStream.writeByte(ObjectOutputStream.java:1914) at java.io.ObjectOutputStream.writeFatalException(ObjectOutputStream.java:1575) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:350) at org.apache.spark.serializer.JavaSerializationStream.writeObject(JavaSerializer.scala:42) at org.apache.spark.storage.DiskBlockObjectWriter.write(BlockObjectWriter.scala:195) at org.apache.spark.util.collection.ExternalSorter$$anonfun$writePartitionedFile$4$$anonfun$apply$2.apply(ExternalSorter.scala:751) at org.apache.spark.util.collection.ExternalSorter$$anonfun$writePartitionedFile$4$$anonfun$apply$2.apply(ExternalSorter.scala:750) at scala.collection.Iterator$class.foreach(Iterator.scala:727) at scala.collection.AbstractIterator.foreach(Iterator.scala:1157) at org.apache.spark.util.collection.ExternalSorter$$anonfun$writePartitionedFile$4.apply(ExternalSorter.scala:750) at org.apache.spark.util.collection.ExternalSorter$$anonfun$writePartitionedFile$4.apply(ExternalSorter.scala:746) at scala.collection.Iterator$class.foreach(Iterator.scala:727) at scala.collection.AbstractIterator.foreach(Iterator.scala:1157) at org.apache.spark.util.collection.ExternalSorter.writePartitionedFile(ExternalSorter.scala:746) at org.apache.spark.shuffle.sort.SortShuffleWriter.write(SortShuffleWriter.scala:68) at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:68) at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41) at org.apache.spark.scheduler.Task.run(Task.scala:56) at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:200) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) By the time it happens the shuffle write size is 0.0B and input size is 3.4MB. I wonder what operation could quickly eat up the entire 5G free disk space. In addition, The storage level of the entire job is confined to MEMORY_ONLY_SERIALIZED and checkpointing is completely disabled.