cloudera :由: java.lang.ClassNotFoundException: org.apache.htrace.core.Tracer$Builder引起
cloudera :由: java.lang.ClassNotFoundException: org.apache.htrace.core.Tracer$Builder引起
提问于 2016-10-25 05:03:04
我只是在教程之后运行了一个示例程序：http://web.stanford.edu/class/cs246/homeworks/tutorial.pdf
并得到以下错误：
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.
16/10/24 21:48:18 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/htrace/core/Tracer$Builder
at org.apache.hadoop.fs.FsTracer.get(FsTracer.java:42)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2630)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:93)
at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2680)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2662)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:379)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:178)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:363)
at org.apache.hadoop.fs.Path.getFileSystem(Path.java:296)
at org.apache.hadoop.mapreduce.lib.input.FileInputFormat.addInputPath(FileInputFormat.java:520)
at edu.stanford.cs246.wordcount.WordCount.run(WordCount.java:43)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at edu.stanford.cs246.wordcount.WordCount.main(WordCount.java:24)
Caused by: java.lang.ClassNotFoundException: org.apache.htrace.core.Tracer$Builder
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 13 more如何解决这个问题，以便我可以编译程序？谢谢!
回答 2
Stack Overflow用户
回答已采纳
发布于 2016-12-31 11:20:36
您只需添加htrace文件即可。对我来说，hadoop/libs中的htrac-core4-4.0.1-incubating.jar起了作用。谢谢
Stack Overflow用户
发布于 2019-03-02 22:28:29
添加外部罐
我添加了6个外部JAR，最后成功地运行了WordCount.java。它们是：
- htrace-core4-4.0.1-incubating.jar
- httpclient-4.5.2.jar
- httpcore-4.4.1.jar
- jackson-core-asl-1.9.13.jar
- jackson-mapper-asl-1.9.13.jar
- slf4j-nop-1.6.1.jar
希望这对你有帮助
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原文链接：
https://stackoverflow.com/questions/40231703
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