spark Error initializing SparkContext System memory 466092032 must be at least 471859200.

ERROR SparkContext: Error initializing SparkContext.

Java.lang.IllegalArgumentException: System memory 259522560 must be at least 4.718592E8. Please use a larger heap size.

在Eclipse里开发Spark项目，尝试直接在spark里运行程序的时候，遇到下面这个报错：

ERROR SparkContext: Error initializing SparkContext.
java.lang.IllegalArgumentException: System memory 468189184 must be at least 4.718592E8. Please use a larger heap size.

很明显，这是JVM申请的memory不够导致无法启动SparkContext。但是该怎么设呢？

通过查看spark源码，发现源码是这么写的：

[java] view plain copy

/**
* Return the total amount of memory shared between execution and storage, in bytes.
*/
private def getMaxMemory(conf: SparkConf): Long = {
val systemMemory = conf.getLong("spark.testing.memory", Runtime.getRuntime.maxMemory)
val reservedMemory = conf.getLong("spark.testing.reservedMemory",
if (conf.contains("spark.testing")) 0 else RESERVED_SYSTEM_MEMORY_BYTES)
val minSystemMemory = reservedMemory * 1.5
if (systemMemory < minSystemMemory) {
throw new IllegalArgumentException(s"System memory $systemMemory must " +
s"be at least $minSystemMemory. Please use a larger heap size.")
}
val usableMemory = systemMemory - reservedMemory
val memoryFraction = conf.getDouble("spark.memory.fraction", 0.75)
(usableMemory * memoryFraction).toLong
}

所以，这里主要是val systemMemory = conf.getLong("spark.testing.memory", Runtime.getRuntime.maxMemory)。

conf.getLong()的定义和解释是

[java] view plain copy

getLong(key: String, defaultValue: Long): Long
Get a parameter as a long, falling back to a default if not set

所以，我们应该在conf里设置一下spark.testing.memory.

通过尝试，发现可以有2个地方可以设置

1. 自己的源代码处，可以在conf之后加上：

val conf = new SparkConf().setAppName("word count")
conf.set("spark.testing.memory", "2147480000")//后面的值大于512m即可

2. 可以在Eclipse的Run Configuration处，有一栏是Arguments，下面有VMarguments，在下面添加下面一行(值也是只要大于512m即可)

-Dspark.testing.memory=1073741824

其他的参数，也可以动态地在这里设置，比如-Dspark.master=spark://hostname:7077

再运行就不会报这个错误了。

spark Error initializing SparkContext System memory 466092032 must be at least 471859200.相关推荐

Spark-submit:System memory 466092032 must be at least 471859200
在运行Standalone-client模式时遇到如下错误: Spark Executor Command: "/usr/local/jdk1.8.0_181/bin/java" ...
ERROR SparkContext: Error initializing SparkContext. java.lang.IllegalArgumentException: System memo
ERROR SparkContext: Error initializing SparkContext. java.lang.IllegalArgumentException: System memo ...
ERROR SparkContext: Error initializing SparkContext. org.apache.spark.SparkException: Could not pars
ERROR SparkContext: Error initializing SparkContext. org.apache.spark.SparkException: Could not pars ...
System memory 466092032 must be at least
Error initializing SparkContext. dependencies | java.lang.IllegalArgumentException: System memory 46 ...
Spark解决 System memory 259522560 must be at least 471859200
本地运行spark出现问题: 22/04/26 20:11:42 ERROR SparkContext: Error initializing SparkContext. java.lang.Ille ...
SparkContext: Error initializing SparkContext解决方法
SparkContext: Error initializing SparkContext解决方法 Spark在配置高可用集群中,出现报错 ERROR SparkContext: Error init ...
Spark本地测试异常之 System memory 259522560 must be at least 471859200.
解决Spark本地测试异常之 System memory 259522560 must be at least 471859200 一.异常如下二.抛出异常原因三.解决办法一.异常如下 java ...
【Spark】java.lang.IllegalArgumentException: System memory 259522560 must be at least 471859200.
报错 java.lang.IllegalArgumentException: System memory 259522560 must be at least 471859200. Please in ...
System memory 249364480 must be at least 471859200
我是在eclipse run遇到这个问题的,所以解决办法是来到这里加上: 表示运行的时候虚拟空间最小为128,最大为512 在linux上运行jar 如果用控制的虚拟机内存,句子要这么写: java ...

spark Error initializing SparkContext System memory 466092032 must be at least 471859200.

[java] view plain copy

spark Error initializing SparkContext System memory 466092032 must be at least 471859200.相关推荐

最新文章

热门文章