ChenSammi commented on code in PR #9465:
URL: https://github.com/apache/ozone/pull/9465#discussion_r2618422535


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hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/diskbalancer/DiskBalancerService.java:
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@@ -639,9 +639,11 @@ public DiskBalancerInfo getDiskBalancerInfo() {
     volumeDatadensity = 
DiskBalancerVolumeCalculation.calculateVolumeDataDensity(immutableVolumeSet, 
deltaSizes);
 
     long bytesToMove = 0;
-    if (this.operationalState == DiskBalancerRunningStatus.RUNNING) {
+    if (this.operationalState == DiskBalancerRunningStatus.RUNNING &&
+        !inProgressContainers.isEmpty()) {

Review Comment:
   @Gargi-jais11 , I don't  think we should check 
inProgressContainers.isEmpty() here. There is chance that 
inProgressContainers.isEmpty()  is empty but there are more containers in 
volume can be moved. It's just depends on the timing that getDiskBalancerInfo() 
is called.  So this check  inProgressContainers.isEmpty() will cause another 
EstimatedBytesToMove inaccurate case. 
   
   Besides, it's not a bug if there is no container to move while  
EstimatedBytesToMove is not 0, if the configured threshold is very small and 
none of container's size of DN is less than this value. 



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