I'm trying to run a simple python application on a 2-node-cluster I set up in standalone mode. A master and a worker, whereas the master also takes on the role of a worker.
In the following code I'm trying to count the number of cakes occurring in a 500MB text file and it fails with a ExecutorLostFailure.
Interestingly the application runs through if I take a 100MB input file.
I used the package version of CDH5.4.4 with YARN and I'm running Spark 1.3.0. Each node has 8GB of memory and these are some of my configurations:
- executor memory: 4g
- driver memory: 2g
- number of cores per worker: 1
- serializer: Kryo
SimpleApp.py:
from pyspark import SparkContext, SparkConf sc = SparkContext(appName="Simple App") logFile = "/user/ubuntu/largeTextFile500m.txt" logData = sc.textFile(logFile) cakes = logData.filter(lambda s: "cake" in s).count() print "Number of cakes: %i" % cakes sc.stop() Submitting application:
spark-submit --master spark://master:7077 /home/ubuntu/SimpleApp.py Excerp from the log:
15/08/13 09:04:59 WARN ThreadLocalRandom: Failed to generate a seed from SecureRandom within 3 seconds. Not enough entrophy? ... 15/08/13 09:05:09 ERROR TaskSchedulerImpl: Lost executor 1 on master: remote Akka client disassociated 15/08/13 09:05:09 INFO TaskSetManager: Re-queueing tasks for 1 from TaskSet 0.0 15/08/13 09:05:09 WARN TaskSetManager: Lost task 0.0 in stage 0.0 (TID 0, master): ExecutorLostFailure (executor 1 lost) ... 15/08/13 09:05:09 ERROR SparkDeploySchedulerBackend: Asked to remove non-existent executor 1 ... 15/08/13 09:05:13 ERROR TaskSchedulerImpl: Lost executor 0 on worker: remote Akka client disassociated 15/08/13 09:05:13 INFO TaskSetManager: Re-queueing tasks for 0 from TaskSet 0.0 15/08/13 09:05:13 WARN TaskSetManager: Lost task 0.1 in stage 0.0 (TID 5, worker): ExecutorLostFailure (executor 0 lost) ... 15/08/13 09:05:13 ERROR SparkDeploySchedulerBackend: Asked to remove non-existent executor 0 ... 15/08/13 09:05:21 ERROR TaskSchedulerImpl: Lost executor 2 on master: remote Akka client disassociated 15/08/13 09:05:21 INFO TaskSetManager: Re-queueing tasks for 2 from TaskSet 0.0 15/08/13 09:05:21 WARN TaskSetManager: Lost task 0.2 in stage 0.0 (TID 6, master): ExecutorLostFailure (executor 2 lost) ... 15/08/13 09:05:21 ERROR SparkDeploySchedulerBackend: Asked to remove non-existent executor 2 ... 15/08/13 09:05:29 ERROR TaskSchedulerImpl: Lost executor 3 on worker: remote Akka client disassociated 15/08/13 09:05:29 INFO TaskSetManager: Re-queueing tasks for 3 from TaskSet 0.0 15/08/13 09:05:29 WARN TaskSetManager: Lost task 0.3 in stage 0.0 (TID 7, worker): ExecutorLostFailure (executor 3 lost) ... 15/08/13 09:05:29 ERROR SparkDeploySchedulerBackend: Asked to remove non-existent executor 3 ... 15/08/13 09:05:29 INFO DAGScheduler: Job 0 failed: count at /home/ubuntu/SimpleApp.py:6, took 28.156765 s Traceback (most recent call last): File "/home/ubuntu/Michael/SimpleApp2.py", line 6, in cakes = logData.filter(lambda s: "cake" in s).count() File "/usr/lib/spark/python/pyspark/rdd.py", line 933, in count return self.mapPartitions(lambda i: [sum(1 for _ in i)]).sum() File "/usr/lib/spark/python/pyspark/rdd.py", line 924, in sum return self.mapPartitions(lambda x: [sum(x)]).reduce(operator.add) File "/usr/lib/spark/python/pyspark/rdd.py", line 740, in reduce vals = self.mapPartitions(func).collect() File "/usr/lib/spark/python/pyspark/rdd.py", line 701, in collect bytesInJava = self._jrdd.collect().iterator() File "/usr/lib/spark/python/lib/py4j-0.8.2.1-src.zip/py4j/java_gateway.py", line 538, in __call__ File "/usr/lib/spark/python/lib/py4j-0.8.2.1-src.zip/py4j/protocol.py", line 300, in get_return_value py4j.protocol.Py4JJavaError15/08/13 09:05:29 INFO DAGScheduler: Executor lost: 3 (epoch 3) 15/08/13 09:05:29 INFO BlockManagerMasterActor: Trying to remove executor 3 from BlockManagerMaster. 15/08/13 09:05:29 INFO AppClient$ClientActor: Executor updated: app-20150813090456-0000/5 is now RUNNING 15/08/13 09:05:29 INFO BlockManagerMasterActor: Removing block manager BlockManagerId(3, worker, 4075) : An error occurred while calling o41.collect. : org.apache.spark.SparkException: Job aborted due to stage failure: Task 0 in stage 0.0 failed 4 times, most recent failure: Lost task 0.3 in stage 0.0 (TID 7, worker): ExecutorLostFailure (executor 3 lost) Driver stacktrace: at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1203) at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1192) at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1191) at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59) at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47) at org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1191) at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:693) at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:693) at scala.Option.foreach(Option.scala:236) at org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:693) at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1393) at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1354) at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48) 15/08/13 09:05:29 INFO BlockManagerMaster: Removed 3 successfully in removeExecutor 15/08/13 09:05:29 INFO AppClient$ClientActor: Executor updated: app-20150813090456-0000/5 is now LOADING 15/08/12 15:23:28 DEBUG DFSClient: DFSClient seqno: 20 status: SUCCESS status: SUCCESS downstreamAckTimeNanos: 857203 numAs = logData.filter(lambda s: "cake" in s).count() File "/usr/lib/spark/python/pyspark/rdd.py", line 933, in count return self.mapPartitions(lambda i: [sum(1 for _ in i)]).sum() File "/usr/lib/spark/python/pyspark/rdd.py", line 924, in sum return self.mapPartitions(lambda x: [sum(x)]).reduce(operator.add) File "/usr/lib/spark/python/pyspark/rdd.py", line 740, in reduce vals = self.mapPartitions(func).collect() File "/usr/lib/spark/python/pyspark/rdd.py", line 701, in collect bytesInJava = self._jrdd.collect().iterator() File "/usr/lib/spark/python/lib/py4j-0.8.2.1-src.zip/py4j/java_gateway.py", line 538, in __call__ File "/usr/lib/spark/python/lib/py4j-0.8.2.1-src.zip/py4j/protocol.py", line 300, in get_return_value py4j.protocol.Py4JJavaError: An error occurred while calling o43.collect. : org.apache.spark.SparkException: Job aborted due to stage failure: Task 0 in stage 0.0 failed 4 times, most recent failure: Lost task 0.3 in stage 0.0 (TID 4, master): ExecutorLostFailure (executor 4 lost) Driver stacktrace: at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1203) at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1192) at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1191) at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59) at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47) at org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1191) at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:693) at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:693) at scala.Option.foreach(Option.scala:236) at org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:693) at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1393) at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1354) at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48) Any suggestions?