hadoop 常见错误及解决方法

zhendeaini123

2013-07-05 18:17:31,885 INFO org.apache.hadoop.mapred.JobTracker: STARTUP_MSG:　　/************************************************************
　　STARTUP_MSG: Starting JobTracker
　　STARTUP_MSG:   host = namenode/192.168.202.50
　　STARTUP_MSG:   args = []
　　STARTUP_MSG:   version = 0.20.2
　　STARTUP_MSG:   build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r 911707; compiled by 'chrisdo' on Fri Feb 19 08:07:34 UTC 2010
　　************************************************************/
　　2013-07-05 18:17:32,046 INFO org.apache.hadoop.mapred.JobTracker: Scheduler configured with (memSizeForMapSlotOnJT, memSizeForReduceSlotOnJT, limitMaxMemForMapTasks, limitMaxMemForReduceTasks) (-1, -1, -1, -1)
　　2013-07-05 18:17:32,055 FATAL org.apache.hadoop.mapred.JobTracker: java.lang.RuntimeException: java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.hadoop.mapred.CapacityTaskScheduler
　　at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:841)
　　at org.apache.hadoop.mapred.JobTracker.(JobTracker.java:1573)
　　at org.apache.hadoop.mapred.JobTracker.startTracker(JobTracker.java:183)
　　at org.apache.hadoop.mapred.JobTracker.startTracker(JobTracker.java:175)
　　at org.apache.hadoop.mapred.JobTracker.main(JobTracker.java:3702)
　　Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: org.apache.hadoop.mapred.CapacityTaskScheduler
　　at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:809)
　　at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:833)
　　... 4 more
　　Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.mapred.CapacityTaskScheduler
　　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)
　　at java.lang.Class.forName0(Native Method)
　　at java.lang.Class.forName(Class.java:247)
　　at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:762)
　　at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:807)
　　... 5 more
　　2013-07-05 18:17:32,056 INFO org.apache.hadoop.mapred.JobTracker: SHUTDOWN_MSG:
　　/************************************************************
　　SHUTDOWN_MSG: Shutting down JobTracker at namenode/192.168.202.50
　　************************************************************/