Hello Andrew, i wish I could share the code, but for proprietary reasons I can't. But I can give some idea though of what i am trying to do. The job reads a file and for each line of that file and processors these lines. I am not doing anything intense in the "processLogs" function
import argonaut._ import argonaut.Argonaut._ /* all of these case classes are created from json strings extracted from the line in the processLogs() function * */ case class struct1… case class struct2… case class value1(struct1, struct2) def processLogs(line:String): Option[(key1, value1)] {… } def run(sparkMaster, appName, executorMemory, jarsPath) { val sparkConf = new SparkConf() sparkConf.setMaster(sparkMaster) sparkConf.setAppName(appName) sparkConf.set("spark.executor.memory", executorMemory) sparkConf.setJars(jarsPath) // This includes all the jars relevant jars.. val sc = new SparkContext(sparkConf) val rawLogs = sc.textFile("hdfs://<my-hadoop-namenode:8020:myfile.txt") rawLogs.saveAsTextFile("hdfs://<my-hadoop-namenode:8020:writebackForTesting") rawLogs.flatMap(processLogs).saveAsTextFile("hdfs://<my-hadoop-namenode:8020:outfile.txt") } If I switch to "local" mode, the code runs just fine, it fails with the error I pasted above. In the cluster mode, even writing back the file we just read fails (rawLogs.saveAsTextFile("hdfs://<my-hadoop-namenode:8020:writebackForTesting") I still believe this is a classNotFound error in disguise Thanks Shivani On Wed, Jun 18, 2014 at 2:49 PM, Andrew Ash <and...@andrewash.com> wrote: > Wait, so the file only has four lines and the job running out of heap > space? Can you share the code you're running that does the processing? > I'd guess that you're doing some intense processing on every line but just > writing parsed case classes back to disk sounds very lightweight. > > I > > > On Wed, Jun 18, 2014 at 5:17 PM, Shivani Rao <raoshiv...@gmail.com> wrote: > >> I am trying to process a file that contains 4 log lines (not very long) >> and then write my parsed out case classes to a destination folder, and I >> get the following error: >> >> >> java.lang.OutOfMemoryError: Java heap space >> >> at >> org.apache.hadoop.io.WritableUtils.readCompressedStringArray(WritableUtils.java:183) >> >> at >> org.apache.hadoop.conf.Configuration.readFields(Configuration.java:2244) >> >> at org.apache.hadoop.io.ObjectWritable.readObject(ObjectWritable.java:280) >> >> at org.apache.hadoop.io.ObjectWritable.readFields(ObjectWritable.java:75) >> >> at >> org.apache.spark.SerializableWritable.readObject(SerializableWritable.scala:39) >> >> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >> >> at >> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) >> >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) >> >> at java.lang.reflect.Method.invoke(Method.java:597) >> >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) >> >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848) >> >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752) >> >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328) >> >> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350) >> >> at >> org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:40) >> >> at org.apache.spark.broadcast.HttpBroadcast$.read(HttpBroadcast.scala:165) >> >> at >> org.apache.spark.broadcast.HttpBroadcast.readObject(HttpBroadcast.scala:56) >> >> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >> >> at >> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) >> >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) >> >> at java.lang.reflect.Method.invoke(Method.java:597) >> >> at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) >> >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848) >> >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752) >> >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328) >> >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946) >> >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870) >> >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752) >> >> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328) >> >> at >> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946) >> >> at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870) >> >> at >> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752) >> >> >> Sadly, there are several folks that have faced this error while trying to >> execute Spark jobs and there are various solutions, none of which work for >> me >> >> >> a) I tried ( >> http://apache-spark-user-list.1001560.n3.nabble.com/Spark-1-0-0-java-lang-outOfMemoryError-Java-Heap-Space-td7735.html#a7736) >> changing the number of partitions in my RDD by using coalesce(8) and the >> error persisted >> >> b) I tried changing SPARK_WORKER_MEM=2g, SPARK_EXECUTOR_MEMORY=10g, and >> both did not work >> >> c) I strongly suspect there is a class path error ( >> http://apache-spark-user-list.1001560.n3.nabble.com/how-to-set-spark-executor-memory-and-heap-size-td4719.html) >> Mainly because the call stack is repetitive. Maybe the OOM error is a >> disguise ? >> >> d) I checked that i am not out of disk space and that i do not have too >> many open files (ulimit -u << sudo ls /proc/<spark_master_process_id>/fd | >> wc -l) >> >> >> I am also noticing multiple reflections happening to find the right >> "class" i guess, so it could be "class Not Found: error disguising itself >> as a memory error. >> >> >> Here are other threads that are encountering same situation .. but have >> not been resolved in any way so far.. >> >> >> >> http://apache-spark-user-list.1001560.n3.nabble.com/no-response-in-spark-web-UI-td4633.html >> >> >> http://apache-spark-user-list.1001560.n3.nabble.com/Spark-program-thows-OutOfMemoryError-td4268.html >> >> >> Any help is greatly appreciated. I am especially calling out on creators >> of Spark and Databrick folks. This seems like a "known bug" waiting to >> happen. >> >> >> Thanks, >> >> Shivani >> >> -- >> Software Engineer >> Analytics Engineering Team@ Box >> Mountain View, CA >> > > -- Software Engineer Analytics Engineering Team@ Box Mountain View, CA