PROSAGA码农传奇-YARN-处理大数据集时出现FetchFailedException或MetadataFetchFailedException

当我运行具有1 GB数据集的解析代码时，它会完成而没有任何错误。但是，当我一次尝试25 gb的数据时，我得到的错误更少。我试图了解如何避免出现以下故障。很高兴听到任何建议或想法。不同的错误，
<pre><code>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}
</code></pre>群集详细信息：纱线：8个节点 总内核：64 内存：500 GB Spark版本：1.5Spark提交声明：
<pre><code>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 \
</code></pre>堆栈跟踪之一：
<pre><code>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)
</code></pre>