JackBuggins commented on PR #4537:
URL: https://github.com/apache/hadoop/pull/4537#issuecomment-1385975581

   I've just span up a version of rc-0 3.3.5 against semeru 11.0.17 from and 
executed a few of the sample jobs and checked out the dev/null out. eg.
   
   ```
   yarn jar 
$HADOOP_HOME/share/hadoop/mapreduce/hadoop-mapreduce-examples-3.3.5.jar teragen 
100 /test 
   yarn jar 
$HADOOP_HOME/share/hadoop/mapreduce/hadoop-mapreduce-examples-3.3.5.jar 
terasort /test /testout
   ```
   
   I'm not seeing anything suspicious in the stderr - @ivrisivris can you give 
me some more detail on the specific cluster config / actions / workloads that 
triggered this so I can reproduce and diagnose a bit better? Are you using this 
with Spark or anything else? Are these being added to the classpath in some 
other way?
   
   I currently don't believe anything packaged IBM semeru 11.0.17 or hadoop 
rc-0 3.3.5 contains something to trigger the check added, (I've even ran a jar 
with just that class to check that, and this looks good). Whilst I wait on a 
response on the above I'll check that there isn't anywhere else that is not 
using the `IBM_JAVA` check to determine the use of those modules and report 
back shortly.
   


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