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  • Hadoop-2.7.3 问题收集

    问题1:在DFS Lcation 上不能多文件进行操作:

    Hadoop上的每个节点上修改该文件       conf/mapred-site.xml

             增加: 

                       <property>

                       <name>dfs.permissions</name>

                       <value>false</value>

                       </property>

             关闭权限验证

    问题2

    log4j:WARN No appenders could be foundfor logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).

    log4j:WARN Please initialize the log4jsystem properly.

    log4j:WARN Seehttp://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

    在src文件夹下创建以log4j.properties命名的文件

    文件内容如下log4j.rootLogger=debug,stdout,R
    log4j.appender.stdout=org.apache.log4j.ConsoleAppender
    log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
    log4j.appender.stdout.layout.ConversionPattern=%5p - %m%n
    log4j.appender.R=org.apache.log4j.RollingFileAppender
    log4j.appender.R.File=mapreduce_test.log
    log4j.appender.R.MaxFileSize=1MB
    log4j.appender.R.MaxBackupIndex=1
    log4j.appender.R.layout=org.apache.log4j.PatternLayout
    log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n
    log4j.logger.com.codefutures=DEBUG

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  • 原文地址:https://www.cnblogs.com/datapool/p/6129679.html
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