无法加载类org.slf4j.impl.StaticLoggerBinder和无法加载原生的Hadoop库

Question

我是新与Hadoop和MapReduce的一个任务过程中，我得到了以下错误：

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". 
SLF4J: Defaulting to no-operation (NOP) logger implementation 
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details. 
15/09/18 07:31:10 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 

我该如何解决这个？

谢谢！

Answer 1

这里是你的错误，意思是：

对于SLF4J：

SLF4J: **Failed to load class** "org.slf4j.impl.StaticLoggerBinder". 
SLF4J: Defaulting to no-operation (NOP) logger implementation 
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details. 

正如你所知道的，你没有相应的类（* 无法加载类*）为SLF4J工作所以它默认为不记录（（NOP）记录器实现）。继建议link你可以看到这种情况的解决办法是：

Placing one (and only one) of slf4j-nop.jar , slf4j-simple.jar , slf4j-log4j12.jar , slf4j-jdk14.jar or logback-classic.jar on the class path should solve the problem

Hadoop的：

15/09/18 07:31:10 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 

这只是意味着本机库不能被发现，但一般不影响道路Hadoop功能。至于本机库：

The native library just contains implementations of certain components for performance reasons and for non-availability of Java implementations. These components are available in a single, dynamically-linked native library called the native hadoop library. On the *nix platforms the library is named libhadoop.so.

无论如何，如果你真的想摆脱的警告，您可以按照提供here的众多解决方案之一。