Shilun Fan created HDDS-15275:
---------------------------------
Summary: DiskBalancer getIdealUsage handles zero capacity
incorrectly
Key: HDDS-15275
URL: https://issues.apache.org/jira/browse/HDDS-15275
Project: Apache Ozone
Issue Type: Improvement
Reporter: Shilun Fan
Assignee: Shilun Fan
DiskBalancerVolumeCalculation#getIdealUsage does not explicitly handle empty
volume lists or volume snapshots whose total capacity is zero.
Current implementation sums the total capacity and effective used bytes, then
directly divides:
{code:java}
return ((double) totalEffectiveUsed) / totalCapacity; {code}
If the input volume list is empty, totalCapacity is 0, so the method returns
NaN. If all volumes have zero capacity, the method may return NaN or Infinity
depending on effective used bytes.
This is inconsistent with the method Javadoc, which says an
IllegalArgumentException is thrown when total capacity is zero.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
