hadoop 常见错误及解决方法
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
************************************************************/
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