执行mapreduce测试时出现No appenders could be found for logger

qq_37882946 2018-03-20 09:12:51
刚装好环境进行mapreduce测试时出现No appenders could be found for logger (org.apache.hadoop.mapreduce.v2.app.MRAppMaster)。下面是日志信息:
[2018-03-20 21:11:38.158]Container exited with a non-zero exit code 1. Error file: prelaunch.err.
Last 4096 bytes of prelaunch.err :
Last 4096 bytes of stderr :
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.google.inject.internal.cglib.core.$ReflectUtils$2 (file:/usr/local/hadoop/hadoop-3.0.0/share/hadoop/yarn/lib/guice-4.0.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of com.google.inject.internal.cglib.core.$ReflectUtils$2
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
3月 20, 2018 9:11:34 下午 com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory register
信息: Registering org.apache.hadoop.mapreduce.v2.app.webapp.JAXBContextResolver as a provider class
3月 20, 2018 9:11:34 下午 com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory register
信息: Registering org.apache.hadoop.yarn.webapp.GenericExceptionHandler as a provider class
3月 20, 2018 9:11:34 下午 com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory register
信息: Registering org.apache.hadoop.mapreduce.v2.app.webapp.AMWebServices as a root resource class
3月 20, 2018 9:11:34 下午 com.sun.jersey.server.impl.application.WebApplicationImpl _initiate
信息: Initiating Jersey application, version 'Jersey: 1.19 02/11/2015 03:25 AM'
3月 20, 2018 9:11:34 下午 com.sun.jersey.guice.spi.container.GuiceComponentProviderFactory getComponentProvider
信息: Binding org.apache.hadoop.mapreduce.v2.app.webapp.JAXBContextResolver to GuiceManagedComponentProvider with the scope "Singleton"
log4j:WARN No appenders could be found for logger (org.apache.hadoop.mapreduce.v2.app.MRAppMaster).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
有哪位大神可以帮我看看的?多谢了
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windows上eclipse运行hadoop程序报NullPointerException错 log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. Exception in thread "main" java.lang.NullPointerException     at java.lang.ProcessBuilder.start(ProcessBuilder.java:1010)     at org.apache.hadoop.util.Shell.runCommand(Shell.java:482)     at org.apache.hadoop.util.Shell.run(Shell.java:455)     at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:715)     at org.apache.hadoop.util.Shell.execCommand(Shell.java:808)     at org.apache.hadoop.util.Shell.execCommand(Shell.java:791)     at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:656)     at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:444)     at org.apache.hadoop.fs.FilterFileSystem.mkdirs(FilterFileSystem.java:293)     at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:133)     at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:437)     at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1296)     at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1293)     at java.security.AccessController.doPrivileged(Native Method)     at javax.security.auth.Subject.doAs(Subject.java:415)     at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)     at org.apache.hadoop.mapreduce.Job.submit(Job.java:1293)     at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1314)     at com.lxz.mr.WCApp.main(WCApp.java:27) 原因是hadoop.dll文件和winutils.exe文件缺失了。解决步骤为: 1,下载这两个文件,下载地址:https://download.csdn.net/download/luxiangzhou/10635946 2,解压之后,把hadoop.dll拷贝到C:\Windows\System32下面 3,创建环境变量HADOOP_HOME,然后把winutils.exe文件拷贝到${HADOOP_HOME}/bin目录下

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