protected boolean canSplit() {
    return !region.getRegionInfo().isMetaRegion() && region.isAvailable()
      && region.getStores().stream().allMatch(HStore::canSplit);
  }
Returns {@code true} if the specified region can be split.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionSplitPolicy.java