slfan1989 commented on code in PR #10267:
URL: https://github.com/apache/ozone/pull/10267#discussion_r3245537661
##########
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/diskbalancer/DiskBalancerVolumeCalculation.java:
##########
@@ -70,13 +70,22 @@ public static List<VolumeFixedUsage>
getVolumeUsages(MutableVolumeSet volumeSet,
* @throws IllegalArgumentException if total capacity is zero
*/
public static double getIdealUsage(List<VolumeFixedUsage> volumes) {
+ if (volumes == null || volumes.isEmpty()) {
+ return 0.0;
+ }
+
long totalCapacity = 0L, totalEffectiveUsed = 0L;
-
+
for (VolumeFixedUsage volumeUsage : volumes) {
totalCapacity += volumeUsage.getUsage().getCapacity();
totalEffectiveUsed += volumeUsage.getEffectiveUsed();
}
-
+
+ if (totalCapacity <= 0) {
Review Comment:
Updated. `totalCapacity == 0` now returns `0.0` for consistency with the
empty volume case.
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