Fixed Issues in HDFS

There are no fixed issues for HDFS in Cloudera Runtime 7.1.9 SP1.

CDPD-49723:CacheReplicationMonitor holds lock for extended period causing NameNode outage

CacheReplicationMonior periodically scans cache directives and cached BlockMap.As more cache directives are added, the scan takes longer, holding a global write lock and preventing the NameNode from processing other requests. The issue is fixed in HDFS-15273, which addresses lock optimization for the effective utilization of Centralized Cache Management.