ndimiduk commented on code in PR #7035:
URL: https://github.com/apache/hbase/pull/7035#discussion_r2121153914
##########
hbase-server/src/main/java/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.java:
##########
@@ -322,14 +322,27 @@ private double getAverageRegionSizeMb(final
List<RegionInfo> tableRegions,
avgRegionSize = targetRegionSize;
} else {
final int regionCount = tableRegions.size();
- final long totalSizeMb =
tableRegions.stream().mapToLong(this::getRegionSizeMB).sum();
+ // Count of regions whose size is known
+ int regionCountKnownSize = 0;
+ long totalSizeMb = 0;
+ for (RegionInfo regionInfo : tableRegions) {
+ long regionSize = getRegionSizeMB(regionInfo);
+ if (regionSize != -1) {
+ totalSizeMb += regionSize;
+ regionCountKnownSize++;
+ }
+ }
if (targetRegionCount > 0) {
- avgRegionSize = totalSizeMb / (double) targetRegionCount;
+ avgRegionSize =
+ totalSizeMb / (double) targetRegionCount - (regionCount -
regionCountKnownSize);
} else {
- avgRegionSize = totalSizeMb / (double) regionCount;
+ avgRegionSize = totalSizeMb / (double) regionCountKnownSize;
Review Comment:
I think that you also need to protect against a 0 value here, in the same
way.
##########
hbase-server/src/main/java/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.java:
##########
@@ -322,14 +322,27 @@ private double getAverageRegionSizeMb(final
List<RegionInfo> tableRegions,
avgRegionSize = targetRegionSize;
} else {
final int regionCount = tableRegions.size();
- final long totalSizeMb =
tableRegions.stream().mapToLong(this::getRegionSizeMB).sum();
+ // Count of regions whose size is known
+ int regionCountKnownSize = 0;
+ long totalSizeMb = 0;
+ for (RegionInfo regionInfo : tableRegions) {
+ long regionSize = getRegionSizeMB(regionInfo);
+ if (regionSize != -1) {
+ totalSizeMb += regionSize;
+ regionCountKnownSize++;
+ }
+ }
if (targetRegionCount > 0) {
- avgRegionSize = totalSizeMb / (double) targetRegionCount;
+ avgRegionSize =
+ totalSizeMb / (double) targetRegionCount - (regionCount -
regionCountKnownSize);
Review Comment:
If you're going to adjust the denominator here, I think that you also need
to protect against a value <= 0. In that case, you can throw, like we do on
entry into the method.
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