Perhaps this has already been posted elsewhere. If so you have my apology, but I was trying to install HDP 2.6 on a Centos 7 everything distribution and ran into an issue where the Spark client failed to install correctly. I discovered that the link at /usr/hdp/current/spark-client/conf for the Spark configuration was not pointing to an existent directory. So as root I created the directory with: mkdir -p /etc/spark/conf and reran the install wizard and all was well. -=> Gregg <=-
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