Github user jongyoul commented on the pull request:
https://github.com/apache/spark/pull/2126#issuecomment-53584096
First of all, to clarify my cluster setting, Hadoop cluster and mesos runs
as "hdfs", and my account name is "1001079o". I also don't think LOGNAME affect
selecting user, but USER may be related by choosing user on using
UnixPrincipal. About printing logs means I add code logDebug() in a
SecurityManager.scala. That's it.
I'm agree that you mentioned that my patch is fragile. but I don't think it
make a problem because runAsSparkUser always the first function running
MesosExecutorBackend.main()
According to your advice, I'm put logDebug() in the UserGroupInformation,
Subject and so on. I'll try to code more concrete code.
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