我试图配置flume将hadoop服务日志写入公共接收器。
这是我添加到hdfs log4j.properties
的内容# Define the root logger to the system property "hadoop.root.logger".
log4j.rootLogger=${hadoop.root.logger}, flume
#Flume Appender
log4j.appender.flume = org.apache.flume.clients.log4jappender.Log4jAppender
log4j.appender.flume.Hostname = localhost
log4j.appender.flume.Port = 41414
当我运行示例pi作业时，我收到此错误
$ hadoop jar hadoop-mapreduce-examples.jar pi 10 10
log4j:ERROR Could not find value for key log4j.appender.flume.layout 15/11/25 07:23:26 WARN api.NettyAvroRpcClient: Using default maxIOWorkers log4j:ERROR RPC client creation failed! NettyAvroRpcClient { host: localhost, port: 41414 }: RPC connection error Exception in thread "main" java.lang.ExceptionInInitializerError
at org.apache.hadoop.util.RunJar.run(RunJar.java:200)
at org.apache.hadoop.util.RunJar.main(RunJar.java:136) Caused by: org.apache.commons.logging.LogConfigurationException: User-specified log class 'org.apache.commons.logging.impl.Log4JLogger' cannot be found or is not useable.
at org.apache.commons.logging.impl.LogFactoryImpl.discoverLogImplementation(LogFactoryImpl.java:804)
at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:541)
at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:292)
at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:269)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:657)
at org.apache.hadoop.util.ShutdownHookManager.<clinit>(ShutdownHookManager.java:44)
... 2 more
我已将这些罐子添加到hadoop-hdfs lib
avro-ipc-1.7.3.jar，flume-ng-log4jappender-1.5.2.2.2.7.1-33.jar，flume-ng-sdk-1.5.2.2.2.7.1-33.jar
我确实有hdfs lib中存在的commons-logging（commons-logging-1.1.3.jar）和log4j（1.2.17）jar。有没有调试这个问题的指针？