- Deployed 3-node cluster.
- Added new config group for HDFS service.
- Assigned to newly created group 2 hosts.
- Overrided property DataNode maximum Java heap size from value 1024 to 1025.
- Executed rolling restart of DataNodes so for them maxJavaHeapSize became to 1025.
- Removed newly created group and assigned to HDFS default (where maxJavaHeapSize is 1024).
Result: Restart indicator is absent for HDFS service after deleting config group with custom property.