Spark：初始作业尚未接受任何资源

我在4台不同的机器上安装了Spark集群 . 每台机器都有7.7GB的内存和8核i7处理器 . 我正在使用Pyspark并尝试将5个numpy阵列（每个2.9gb）加载到集群中 . 它们都是我在一台独立机器上生成的更大的14gb numpy阵列的一部分 . 我正在尝试在第一个rdd上运行一个简单的count函数，以确保我的集群正常运行 . 执行时我收到以下警告：

>>> import numpy as np
>>> gen1 = sc.parallelize(np.load('/home/hduser/gen1.npy'),512)
>>> gen1.count()
[Stage 0:>                                                        (0 + 0) / 512]
17/01/28 13:07:07 WARN scheduler.TaskSchedulerImpl: Initial job has not accepted any resources; check your cluster UI to ensure that workers are registered and have sufficient resources
17/01/28 13:07:22 WARN scheduler.TaskSchedulerImpl: Initial job has not accepted any resources; check your cluster UI to ensure that workers are registered and have sufficient resources
17/01/28 13:07:37 WARN scheduler.TaskSchedulerImpl: Initial job has not accepted any resources; check your cluster UI to ensure that workers are registered and have sufficient resources
[Stage 0:>                                                        (0 + 0) / 512]
17/01/28 13:07:52 WARN scheduler.TaskSchedulerImpl: Initial job has not accepted any resources; check your cluster UI to ensure that workers are registered and have sufficient resources
^C
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/opt/spark/python/pyspark/rdd.py", line 1008, in count
    return self.mapPartitions(lambda i: [sum(1 for _ in i)]).sum()
  File "/opt/spark/python/pyspark/rdd.py", line 999, in sum
    return self.mapPartitions(lambda x: [sum(x)]).fold(0, operator.add)
  File "/opt/spark/python/pyspark/rdd.py", line 873, in fold
    vals = self.mapPartitions(func).collect()
  File "/opt/spark/python/pyspark/rdd.py", line 776, in collect
    port = self.ctx._jvm.PythonRDD.collectAndServe(self._jrdd.rdd())
  File "/opt/spark/python/lib/py4j-0.10.1-src.zip/py4j/java_gateway.py", line 931, in __call__
  File "/opt/spark/python/lib/py4j-0.10.1-src.zip/py4j/java_gateway.py", line 695, in send_command
  File "/opt/spark/python/lib/py4j-0.10.1-src.zip/py4j/java_gateway.py", line 828, in send_command
  File "/home/hduser/anaconda2/lib/python2.7/socket.py", line 451, in readline
    data = self._sock.recv(self._rbufsize)
  File "/opt/spark/python/pyspark/context.py", line 223, in signal_handler
    raise KeyboardInterrupt()
KeyboardInterrupt

当我检查我的集群UI时，它说有3个正在运行的工作程序，但只有1个执行程序（驱动程序，与我的主IP相关联） . 我假设这是一个配置问题 .

我在spark-env.sh（master）中的设置：

export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop
export SPARK_MASTER_IP=192.168.1.2

这些设置在每台工作机器上都是相同的 .

我在spark-defaults.conf（master）中的设置：

spark.master    spark://lebron:7077
spark.serializer    org.apache.spark.serializer.KryoSerializer
spark.driver.memory 5g
spark.dynamicAllocation.enabled true
spark.shuffle.service.enabled   true
spark.kryoserializer.buffer.max 128m

每个工作程序仅具有如上设置的 spark.master 和 spark.serializer 配置选项 .

我还需要弄清楚如何调整我的内存管理，因为在此问题出现之前，当我应该有足够的内存时，我正在左右抛出Java堆空间OOM异常 . 但也许我会为另一个问题保存 .

请帮忙！