Cloudera Docs

HBase RegionServer heap size

Post transition to CDP Private Cloud Base 7.1.7 SP2, you must adjust the HBase RegionServer heap size.

The change introduced in HBASE-26036/HBASE-26777 adds an extra copy of cells into the heap, resulting in out of memory on the region servers if the hbase_regionserver_java_heapsize is not set correctly. Also, if the region server is killed because of out of memory issue under a large amount concurrent PUTs with multi-columns and scan the recent result. This issue accours only during the two stage upgrade from HDP 2.6.5 to CDP Private Cloud Base 7.1.7 SP2.

Workaround: After transitioning to CDP Private Cloud Base 7.1.7 SP2, you must adjust the value of hbase_regionserver_java_heapsize to two times more than the original value used in the HDP 2.6.5 cluster.
  1. Log in to Cloudera Manager.
  2. Select the HBase service.
  3. Select Configurations tab.
  4. Search for hbase_regionserver_java_heapsize and adjust the value.
  5. Click Save Changes.