[GitHub] [spark] lys0716 commented on a change in pull request #23941: [MINOR][DOC] Add more details to descriptions of customized class path

[GitBox <gi...@apache.org>]

lys0716 commented on a change in pull request #23941: [MINOR][DOC] Add more details to descriptions of customized class path
URL: https://github.com/apache/spark/pull/23941#discussion_r261886382
 
 

 ##########
 File path: docs/configuration.md
 ##########
 @@ -441,7 +441,7 @@ Apart from these, the following properties are also available, and may be useful
   <td>false</td>
   <td>
     (Experimental) Same functionality as <code>spark.driver.userClassPathFirst</code>, but
-    applied to executor instances.
+    applied to executor instances. This is used in both cluster mode and client mode.
 
 Review comment:
   The reason is that the descriptions of <code>spark.driver.userClassPathFirst</code> said **This is used in cluster mode only**. But <code>spark.executor.userClassPathFirst</code> works for client mode as well.
   
   In our case, we use client mode. There is a use case that we want to overwrite executor class path. We try <code>spark.executor.extraClassPath</code>, but it is not enough. I had to use <code>spark.executor.userClassPathFirst</code> together.
   
   However, the descriptions of <code>spark.driver.userClassPathFirst</code> misleading us. We thought <code>spark.executor.extraClassPath</code> only works for cluster mode.
   
   The submission command would be something like 
   
   > ... --conf spark.executor.extraClassPath=JarA.jar \
   --conf spark.driver.extraClassPath=/path-to-jar/JarA.jar
   --conf spark.executor.userClassPathFirst=true
   ...
   --class package.JarAClass
   /path-to-jar/JarA.jar

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
users@infra.apache.org


With regards,
Apache Git Services

---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscribe@spark.apache.org
For additional commands, e-mail: reviews-help@spark.apache.org