[jira] [Created] (HDFS-12068) Modify judgment condition in function computeVolumeDataDensity,otherwise maybe divided by zero

["steven-wugang (JIRA)" <ji...@apache.org>]

steven-wugang created HDFS-12068:
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             Summary: Modify judgment condition in function computeVolumeDataDensity,otherwise maybe divided by zero
                 Key: HDFS-12068
                 URL: https://issues.apache.org/jira/browse/HDFS-12068
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: steven-wugang


IN function computeVolumeDataDensity,there is a piece of code,as follow:
 public void computeVolumeDataDensity() {
     ...
	 if (volume.computeEffectiveCapacity() < 0) {
          skipMisConfiguredVolume(volume);
          continue;
        }
	....
	double dfsUsedRatio =
            truncateDecimals(volume.getUsed() /
                (double) volume.computeEffectiveCapacity());
 
    ....
}
Did not filter out the case that volume.computeEffectiveCapacity() is zero，maybe divided by zero behind.



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