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From "Smith Hua" <>
Subject re:re:why mysql db no data
Date Wed, 03 Mar 2010 09:07:14 GMT
Thanks for your reply, Eric


I found the may be the new one like in 0.3.0

And which shell is used to collect hadoop metrics in 0.3.0


I installed chukwa on one agent without hadoop environment, can i use to

system information


with the configure to collect hadoop metrics, need to configure like


   1. Copy CHUKWA_HOME/conf/ file to HADOOP_HOME/conf/

   2. Copy CHUKWA_HOME/conf/ file to HADOOP_HOME/conf/

   3. Edit HADOOP_HOME/conf/ file and change @CHUKWA_LOG_DIR@ to
your actual CHUKWA log dirctory (ie, CHUKWA_HOME/var/log) 


But when restart the , catch the exception

log4j:ERROR Could not instantiate class [org.apache.hadoop.chukwa.inputtools.log4j.ChukwaDailyRollingFileAppender].

xx1-19: java.lang.ClassNotFoundException: org.apache.hadoop.chukwa.inputtools.log4j.ChukwaDailyRollingFileAppender

xx1-19:         at$

xx1-19:         at Method)

xx1-19:         at

xx1-19:         at java.lang.ClassLoader.loadClass(

xx1-19:         at sun.misc.Launcher$AppClassLoader.loadClass(

xx1-19:         at java.lang.ClassLoader.loadClass(

xx1-19:         at java.lang.Class.forName0(Native Method)

xx1-19:         at java.lang.Class.forName(

But the daemon can still work, does this matter in running hadoop?


2010-03-03 00:58:17,"Eric Yang" <> wrote:



>/var/message is not stored into mysql.  The only data goes into mysql are

>the system metrics and hadoop metrics.  System metrics is composed of top,

>iostat, sar, and df.  You need to start up to get system

>related data injected into mysql.




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