[GitHub] spark issue #18815: [SPARK-21609][WEB-UI]In the Master ui add "log directory...

[guoxiaolongzte]

Github user guoxiaolongzte commented on the issue:

    https://github.com/apache/spark/pull/18815
  
    1.The master process information is as follows：
     /usr/java8/jdk/bin/java -cp 
/opt/ZDH/parcels/lib/spark_gxl/conf/:/opt/ZDH/parcels/lib/spark_gxl/jars/*:/opt/ZDH/parcels/lib/spark_gxl/conf/hdfs_conf/:/opt/ZDH/parcels/lib/spark_gxl/conf/yarn_conf
 -Dspark.ui.allowFramingFrom=ALLOW-FROM -DLOG_LEVEL=INFO -DROLE_NAME=master 
-DLOG_FILE=/data1/zdh/spark/logs/spark-root-master-zdh167.log -Xmx1024M 
org.apache.spark.deploy.master.Master --host zdh167 --port 7078 --webui-port 
8081
    
    Log4j can not write log files to hdfs.
    Event log is through the hdfs client to write the log to hdfs.
    
    2.Currently only the log path is displayed in the UI. If you can, the 
details will be displayed in the future, and you can view.
    e.g.
    
![11](https://user-images.githubusercontent.com/26266482/28916845-1f737782-7876-11e7-8f9e-3323cedf5082.png)
    
    
![12](https://user-images.githubusercontent.com/26266482/28916863-2abea922-7876-11e7-9c81-94a1c3712af5.png)
    



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