mridulm commented on pull request #30062:
URL: https://github.com/apache/spark/pull/30062#issuecomment-725858686


   Thanks for the ping @dongjoon-hyun ! I had not noticed this issue.
   
   @otterc Is it a dependency issue in hadoop-2.7 ?
   
   ```
   [ERROR] 
testCreateDefaultMergedShuffleFileManagerInstance(org.apache.spark.network.yarn.YarnShuffleServiceSuite)
  Time elapsed: 0.627 s  <<< ERROR!
   java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
        at 
org.apache.spark.network.yarn.YarnShuffleServiceSuite.testCreateDefaultMergedShuffleFileManagerInstance(YarnShuffleServiceSuite.java:37)
   Caused by: java.lang.ClassNotFoundException: 
org.apache.commons.logging.LogFactory
        at 
org.apache.spark.network.yarn.YarnShuffleServiceSuite.testCreateDefaultMergedShuffleFileManagerInstance(YarnShuffleServiceSuite.java:37)
   
   [ERROR] 
testCreateRemoteBlockPushResolverInstance(org.apache.spark.network.yarn.YarnShuffleServiceSuite)
  Time elapsed: 0 s  <<< ERROR!
   java.lang.NoClassDefFoundError: Could not initialize class 
org.apache.spark.network.yarn.YarnShuffleService
        at 
org.apache.spark.network.yarn.YarnShuffleServiceSuite.testCreateRemoteBlockPushResolverInstance(YarnShuffleServiceSuite.java:47)
   
   [ERROR] 
testInvalidClassNameOfMergeManagerWillUseNoOpInstance(org.apache.spark.network.yarn.YarnShuffleServiceSuite)
  Time elapsed: 0.001 s  <<< ERROR!
   java.lang.NoClassDefFoundError: Could not initialize class 
org.apache.spark.network.yarn.YarnShuffleService
        at 
org.apache.spark.network.yarn.YarnShuffleServiceSuite.testInvalidClassNameOfMergeManagerWillUseNoOpInstance(YarnShuffleServiceSuite.java:57)
   ```
   @otterc Can you try building and running master locally with the hadoop-2.7 
profile to check please ? That should help understand what the issue is, and 
more quickly iterate towards a solution.
   I am guessing it should be addition of commons logging for hadoop-2.7 
profile for spark network module - but please check. Thanks !


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