java.lang.IllegalArgumentException: System memory ... must be at least ... Please use a larger heap

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

解决：

设置应用程序的 VM options

idea的设置路径在：Run -Edit Configurations-Application选择对应的程序，设置VM options，如下：

-Xms256m -Xmx1024m

scala ide下的设置为：

eclispe 中window->preferences->Java->Installed JRE ，点击右侧的Edit 按钮，在编辑界面中的 “Default VM Arguments ”选项中，编辑。

could not locate executable **winutils.exe in the Hadoop binaries

windows环境下，解决：could not locate executable **winutils.exe in the Hadoop binaries.问题：

ERROR Shell: Failed to locate the winutils binary in the hadoop binary path
java.io.IOException: Could not locate executable E:\hadoop-2.6.3\bin\winutils.exe in the Hadoop binaries.

解决：将winutils.exe文件导入到对应Hadoop的bin目录下面去，就搞定！（放到HADOOP_HOME对应的hadoop版本目录下面）