Thank you @Sunile Manjee. I had to install Solr to get the access audit tab working. Thanks to @Alexandru Anghel as well. God bless you all.
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Copy mysql-connector-java.jar jar file into /usr/hdp/current/oozie-server/oozie-server/webapps/oozie/WEB-INF/lib folder, this will solved problem
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@Chris Nauroth Then there must be an issue if after 7 hours there is still no reduction in HDFS storage and it still keeps the /trash/finalized folder...
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Changing from Oracle 12c to MySQL resolved this issue. I can't really place my fingers on what it is that made Oozie epileptic with Oracle 12c.
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Or if you want to do it in a dirty way. ( Ravi's way is obviously cleaner ). Replace the drive make sure it works and restart the datanode. Same effect but the datanode will be out of the system for a shorter period of time.
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