Lei (Eddy) Xu created HDFS-7758: ----------------------------------- Summary: Retire FsDatasetSpi#getVolumes() and use FsDatasetSpi#getVolumeRefs() instead Key: HDFS-7758 URL: https://issues.apache.org/jira/browse/HDFS-7758 Project: Hadoop HDFS Issue Type: Improvement Components: datanode Affects Versions: 2.6.0 Reporter: Lei (Eddy) Xu Assignee: Lei (Eddy) Xu
HDFS-7496 introduced reference-counting the volume instances being used to prevent race condition when hot swapping a volume. However, {{FsDatasetSpi#getVolumes()}} can still leak the volume instance without increasing its reference count. In this JIRA, we retire the {{FsDatasetSpi#getVolumes()}} and propose {{FsDatasetSpi#getVolumeRefs()}} and etc. method to access {{FsVolume}}. Thus it makes sure that the consumer of {{FsVolume}} always has correct reference count. -- This message was sent by Atlassian JIRA (v6.3.4#6332)