我使用-libjars命令在hadoop上运行我的jar，并在驱动程序中设置了.run（）和ToolRunner。（这个程序没有map/reduce，只有PutMerges文件到HDFS）。当我使用eclipse导出jar时，程序运行得很好。但是我只需要用我自己的.class文件来构建jar，并在执行过程中导入第三方库。
我的命令是：
hadoop jar myjar.jar package.classname -libjars mypath/logback-core-1.0.1.jar,logback-classic-1.0.1.jar,jul-to-slf4j-1.6.4.jar,jcl-over-slf4j-1.6.4.jar,slf4j-api-1.6.4.jar,log4j-over-slf4j-1.6.4.jar arg1 arg2 arg3 arg4
错误是：
Failed to instantiate SLF4J LoggerFactory
Reported exception:
java.lang.NoClassDefFoundError: ch/qos/logback/core/joran/spi/JoranException
at org.slf4j.LoggerFactory.bind(LoggerFactory.java:128)
at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:108)
at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:279)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:252)
at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:156)
at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:132)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351)
at org.apache.hadoop.conf.Configuration.<clinit>(Configuration.java:150)
at org.apache.hadoop.util.RunJar.main(RunJar.java:143)
Caused by: java.lang.ClassNotFoundException: ch.qos.logback.core.joran.spi.JoranException
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 9 more
Exception in thread "main" java.lang.NoClassDefFoundError: ch/qos/logback/core/joran/spi/JoranException
at org.slf4j.LoggerFactory.bind(LoggerFactory.java:128)
at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:108)
at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:279)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:252)
at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:156)
at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:132)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351)
at org.apache.hadoop.conf.Configuration.<clinit>(Configuration.java:150)
at org.apache.hadoop.util.RunJar.main(RunJar.java:143)
Caused by: java.lang.ClassNotFoundException: ch.qos.logback.core.joran.spi.JoranException
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 9 more
我已经检查了628 03-07-12 07:33 ch/qos/logback/core/joran/spi/JoranException.class确实存在于我的logback.core中。有人能提出建议吗？非常感谢。
为了让代码正常工作，您可以尝试将jar复制到集群上所有节点的HADOOP_HOME/lib/文件夹中，然后重新启动集群。