Known Issues in Cloudera Runtime 7.2.18.400

Learn about the known issues in Cloudera Runtime 7.2.18.400, the impact or changes to the functionality, and the workaround.

CDPD-77399: 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

TSB 2025-797: Using Spark vectorized reads on Iceberg tables with Parquet files could result in malformed data

Due to an upstream Apache Iceberg issue, in specific situations, customers executing Spark vectorized reads on Iceberg tables with Parquet files may encounter malformed output and data incorrectness.

For the latest update on this issue see the corresponding Knowledge article: TSB 2025-797: Using Spark vectorized reads on Iceberg tables with Parquet files could result in malformed data