question: lock that guards access to global variables that track sparkcontext construction . concode_field_sep SparkContext$ MODULE$ concode_field_sep org.apache.spark.WritableConverter<java.lang.Object> booleanWritableConverter concode_elem_sep org.apache.spark.WritableConverter<byte[]> bytesWritableConverter concode_elem_sep org.apache.spark.WritableConverter<java.lang.Object> doubleWritableConverter concode_elem_sep org.apache.hadoop.io.Text stringToText concode_elem_sep org.apache.hadoop.io.ArrayWritable arrayToArrayWritable concode_elem_sep java.lang.String SPARK_UNKNOWN_USER concode_elem_sep java.lang.String SPARK_JOB_DESCRIPTION concode_elem_sep java.lang.String DRIVER_IDENTIFIER concode_elem_sep org.apache.hadoop.io.BooleanWritable boolToBoolWritable concode_elem_sep java.lang.String SPARK_JOB_INTERRUPT_ON_CANCEL concode_elem_sep org.apache.hadoop.io.DoubleWritable doubleToDoubleWritable concode_elem_sep org.apache.spark.rdd.AsyncRDDActions<T> rddToAsyncRDDActions concode_elem_sep org.apache.spark.rdd.PairRDDFunctions<K,V> rddToPairRDDFunctions concode_elem_sep scala.Option<java.lang.String> jarOfClass concode_elem_sep scala.Option<org.apache.spark.SparkContext> activeContext concode_elem_sep org.apache.spark.WritableConverter<java.lang.Object> intWritableConverter concode_elem_sep org.apache.spark.WritableConverter<java.lang.String> stringWritableConverter concode_elem_sep void setActiveContext concode_elem_sep org.apache.spark.rdd.DoubleRDDFunctions numericRDDToDoubleRDDFunctions concode_elem_sep org.apache.hadoop.io.BytesWritable bytesToBytesWritable concode_elem_sep org.apache.spark.WritableConverter<java.lang.Object> floatWritableConverter concode_elem_sep scala.Option<java.lang.String> jarOfObject concode_elem_sep void clearActiveContext concode_elem_sep org.apache.hadoop.io.FloatWritable floatToFloatWritable concode_elem_sep void markPartiallyConstructed concode_elem_sep org.apache.spark.WritableConverter<T> writableWritableConverter concode_elem_sep scala.Tuple2<org.apache.spark.scheduler.SchedulerBackend,org.apache.spark.scheduler.TaskScheduler> createTaskScheduler concode_elem_sep org.apache.spark.rdd.OrderedRDDFunctions<K,V,scala.Tuple2<K,V>> rddToOrderedRDDFunctions concode_elem_sep org.apache.spark.rdd.DoubleRDDFunctions doubleRDDToDoubleRDDFunctions concode_elem_sep scala.Option<org.apache.spark.SparkContext> contextBeingConstructed concode_elem_sep org.apache.hadoop.io.IntWritable intToIntWritable concode_elem_sep org.apache.hadoop.io.LongWritable longToLongWritable concode_elem_sep org.apache.spark.rdd.SequenceFileRDDFunctions<K,V> rddToSequenceFileRDDFunctions concode_elem_sep void assertNoOtherContextIsRunning concode_elem_sep org.apache.spark.WritableConverter<java.lang.Object> longWritableConverter concode_elem_sep java.lang.String SPARK_JOB_GROUP_ID concode_elem_sep org.apache.spark.SparkConf updatedConf
target: java . lang . Object function ( ) { throw new RuntimeException ( ) ; }