?????? Error: Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster

[55865835]

Hi:


I  tried to create the folder /etc/hadoop/conf,  and copied 
the site.xml files of core, yarn, hive and hbase in this folder, and configured 
kylin.env.hadoop-conf-dir=/etc/hadoop/conf  in kylin.properties, and 
restarted kylin, the problem has been solved. Thanks for your advice.







------------------ ???????? ------------------
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                                               "user"                           
                                                         
<yaqian_zh...@126.com&gt;;
????????:&nbsp;2021??7??7??(??????) ????9:55
??????:&nbsp;"user"<user@kylin.apache.org&gt;;"55865835"<hmch...@qq.com&gt;;

????:&nbsp;Re: Error: Could not find or load main class 
org.apache.hadoop.mapreduce.v2.app.MRAppMaster



Hi:

You can check the content of $KYLIN_HOME/bin/cached-hadoop-conf-dir.sh&nbsp;to 
ensure that the ??kylin_hadoop_conf_dir' be set to correct HADOOP_CONF path.


If the path is not correct, you can delete the&nbsp; 
$KYLIN_HOME/bin/cached-hadoop-conf-dir.sh. Then manually configure 
??kylin.env.hadoop-conf-dir' in ??kylin.properties' and restart kylin.
?? 2021??7??6????20:19??55865835 <hmch...@qq.com&gt; ????

Hi:When I compile the sample cube, there are always errors??


Exit code: 1

[2021-07-06 19:55:24.646]Container exited with a non-zero exit code 1. Error 
file: prelaunch.err.
Last 4096 bytes of prelaunch.err :
Last 4096 bytes of stderr :
Error: Could not find or load main class 
org.apache.hadoop.mapreduce.v2.app.MRAppMaster

Please check whether your etc/hadoop/mapred-site.xml contains the below 
configuration:
<property&gt;
<name&gt;yarn.app.mapreduce.am.env</name&gt;
<value&gt;HADOOP_MAPRED_HOME=${full path of your hadoop distribution 
directory}</value&gt;



but it's ok to execute mapreduct task alone??I've tried to configure the hadoop 
classpath, but it doesn't work. Have you ever met this situation?Look forward 
to your reply??