Known Issues in Cloudera Runtime 7.2.17.900

Learn about the known issues in Cloudera Runtime 7.2.17.900, the impact or changes to the functionality, and the workaround.

HBase fails to register the servlet metrics and throws ClassNotFoundException: org.apache.hadoop.metrics.MetricsServlet
The MetricsServlet class is a Hadoop 2-based metric servlet unavailable in Hadoop 3 deployments.
Workaround: Ignore this WARN log message during HBase Master and RegionServer startup.
Apache Issue: HBASE-28315