本文介绍了两种设置Hadoop日志级别的方法：通过网页界面和命令行方式，并提供了获取堆栈跟踪的具体链接。
Setting log levels
There are 2 ways we can use to set log level.
http://jobtracker-host:50030/logLevel
The same thing can be achieved from the command line as follows:
% hadoop daemonlog -setlevel jobtracker-host:50030 \
org.apache.hadoop.mapred.JobTracker DEBUG
Getting stack traces
http://jobtracker-host:50030/stacks
There are 2 ways we can use to set log level.
http://jobtracker-host:50030/logLevel
The same thing can be achieved from the command line as follows:
% hadoop daemonlog -setlevel jobtracker-host:50030 \
org.apache.hadoop.mapred.JobTracker DEBUG
Getting stack traces
http://jobtracker-host:50030/stacks
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