Quando si esegue il codice di analisi con un set di dati da 1 GB, l'operazione viene completata senza errori. Ma, quando cerco 25 GB di dati alla volta, ottengo sotto errori. Sto cercando di capire come posso evitare i fallimenti sotto. Felice di ascoltare qualsiasi suggerimento o idea.FetchFailedException o MetadataFetchFailedException durante l'elaborazione di un grande set di dati
errori differenti,
org.apache.spark.shuffle.MetadataFetchFailedException: Missing an output location for shuffle 0
org.apache.spark.shuffle.FetchFailedException: Failed to connect to ip-xxxxxxxx
org.apache.spark.shuffle.FetchFailedException: Error in opening FileSegmentManagedBuffer{file=/mnt/yarn/nm/usercache/xxxx/appcache/application_1450751731124_8446/blockmgr-8a7b17b8-f4c3-45e7-aea8-8b0a7481be55/08/shuffle_0_224_0.data, offset=12329181, length=2104094}
grappolo d'affitto:
Filato: 8 nodi
nuclei totali: 64
memoria: 500 GB
Spark Versione: 1.5
Spark submit statement :
spark-submit --master yarn-cluster \
--conf spark.dynamicAllocation.enabled=true \
--conf spark.shuffle.service.enabled=true \
--executor-memory 4g \
--driver-memory 16g \
--num-executors 50 \
--deploy-mode cluster \
--executor-cores 1 \
--class my.parser \
myparser.jar \
-input xxx \
-output xxxx \
Uno stack trace:
at org.apache.spark.MapOutputTracker$$anonfun$org$apache$spark$MapOutputTracker$$convertMapStatuses$2.apply(MapOutputTracker.scala:460)
at org.apache.spark.MapOutputTracker$$anonfun$org$apache$spark$MapOutputTracker$$convertMapStatuses$2.apply(MapOutputTracker.scala:456)
at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:772)
at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:108)
at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:771)
at org.apache.spark.MapOutputTracker$.org$apache$spark$MapOutputTracker$$convertMapStatuses(MapOutputTracker.scala:456)
at org.apache.spark.MapOutputTracker.getMapSizesByExecutorId(MapOutputTracker.scala:183)
at org.apache.spark.shuffle.hash.HashShuffleReader.read(HashShuffleReader.scala:47)
at org.apache.spark.rdd.ShuffledRDD.compute(ShuffledRDD.scala:90)
at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)
at org.apache.spark.rdd.RDD.iterator(RDD.scala:264)
at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)
at org.apache.spark.rdd.RDD.iterator(RDD.scala:264)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)
at org.apache.spark.scheduler.Task.run(Task.scala:88)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Il numero 2) conta anche in modalità standalone. Se sì, come possiamo impostarlo. Non riesco a trovare var simili in modalità standalone. – Laeeq