Hi I have a problem with temp data in Spark. I have fixed spark.shuffle.manager to "SORT". In /etc/secucity/limits.conf set the next values: * soft nofile 1000000 * hard nofile 1000000 In spark-env.sh set ulimit -n 1000000 I've restarted the spark service and it continues crashing (Too many open files)
How can I resolve? I'm executing Spark 1.2.0 in Cloudera 5.3.2 java.io.FileNotFoundException: /tmp/spark-local-20150330115312-37a7/2f/temp_shuffle_c4ba5bce-c516-4a2a-9e40-56121eb84a8c (Too many open files) at java.io.FileOutputStream.open(Native Method) at java.io.FileOutputStream.<init>(FileOutputStream.java:221) at org.apache.spark.storage.DiskBlockObjectWriter.open(BlockObjectWriter.scala:123) at org.apache.spark.util.collection.ExternalSorter$$anonfun$spillToPartitionFiles$1.apply(ExternalSorter.scala:360) at org.apache.spark.util.collection.ExternalSorter$$anonfun$spillToPartitionFiles$1.apply(ExternalSorter.scala:355) at scala.Array$.fill(Array.scala:267) at org.apache.spark.util.collection.ExternalSorter.spillToPartitionFiles(ExternalSorter.scala:355) at org.apache.spark.util.collection.ExternalSorter.insertAll(ExternalSorter.scala:211) at org.apache.spark.shuffle.sort.SortShuffleWriter.write(SortShuffleWriter.scala:65) 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$TaskRunner.run(Executor.scala:196) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) 15/03/30 11:54:18 WARN TaskSetManager: Lost task 22.0 in stage 3.0 (TID 27, localhost): java.io.FileNotFoundException: /tmp/spark-local-20150330115312-37a7/2f/temp_shuffle_c4ba5bce-c516-4a2a-9e40-56121eb84a8c (Too many open files) at java.io.FileOutputStream.open(Native Method) at java.io.FileOutputStream.<init>(FileOutputStream.java:221) at org.apache.spark.storage.DiskBlockObjectWriter.open(BlockObjectWriter.scala:123) at org.apache.spark.util.collection.ExternalSorter$$anonfun$spillToPartitionFiles$1.apply(ExternalSorter.scala:360) at org.apache.spark.util.collection.ExternalSorter$$anonfun$spillToPartitionFiles$1.apply(ExternalSorter.scala:355) at scala.Array$.fill(Array.scala:267) at org.apache.spark.util.collection.ExternalSorter.spillToPartitionFiles(ExternalSorter.scala:355) at org.apache.spark.util.collection.ExternalSorter.insertAll(ExternalSorter.scala:211) at org.apache.spark.shuffle.sort.SortShuffleWriter.write(SortShuffleWriter.scala:65) 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$TaskRunner.run(Executor.scala:196) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Thanks!!!!! -- Regards. Miguel Ángel