ndimiduk commented on a change in pull request #1922:
URL: https://github.com/apache/hbase/pull/1922#discussion_r449304240
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File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.java
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@@ -369,7 +369,8 @@ private boolean skipForMerge(final RegionStates
regionStates, final RegionInfo r
}
final long currentSizeMb = getRegionSizeMB(current);
final long nextSizeMb = getRegionSizeMB(next);
- if (currentSizeMb + nextSizeMb < avgRegionSizeMb) {
+ // always merge away empty regions when they present themselves.
+ if (currentSizeMb == 0 || nextSizeMb == 0 || currentSizeMb + nextSizeMb
< avgRegionSizeMb) {
Review comment:
There hasn't been much feedback on the DISCUSS thread.
I'm of the mind that we can resolve this specific bug using the special-case
(`if == 0`) code I have in this patch. I think we should return with another
change that allows the `min_*` values to be unset, and probably remove the
defaults for everything except `min_region_age.days`.
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