deshanxiao commented on issue #1277:
URL: https://github.com/apache/orc/issues/1277#issuecomment-1284848437

   The root cause of the difference between these two commands is that 
`-Dmaven.test.skip=true` does not compile the test classes.
   _Apache Maven Dependency Plugin_ will throw an error if a dependency is not 
used. We can use `ignoreNonCompile `defined in 
https://maven.apache.org/plugins/maven-dependency-plugin/analyze-only-mojo.html#ignoreNonCompile
 to avoid the problem.
   
   After adding this tag, I found that we have some classes such as slf4j-api 
in MapReduce module that only appear in test but scope is defined as compile. 
Maybe we can fix the problem.
   
   What do you think? @zjx20 @dongjoon-hyun 
   


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