[jira] [Commented] (HDFS-7492) If multiple threads call FsVolumeList#checkDirs at the same time, we should only do checkDirs once and give the results to all waiting threads

[ https://issues.apache.org/jira/browse/HDFS-7492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14803419#comment-14803419 ] Colin Patrick McCabe commented on HDFS-7492: [~eclark], also check HDFS-8845 fo

[jira] [Commented] (HDFS-7492) If multiple threads call FsVolumeList#checkDirs at the same time, we should only do checkDirs once and give the results to all waiting threads

[ https://issues.apache.org/jira/browse/HDFS-7492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14746491#comment-14746491 ] Elliott Clark commented on HDFS-7492: - I'm going to grab this one. We're seeing this in

[jira] [Commented] (HDFS-7492) If multiple threads call FsVolumeList#checkDirs at the same time, we should only do checkDirs once and give the results to all waiting threads

[ https://issues.apache.org/jira/browse/HDFS-7492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14238565#comment-14238565 ] Colin Patrick McCabe commented on HDFS-7492: I think a Guava cache could be use