[ https://issues.apache.org/jira/browse/HDFS-13143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16362872#comment-16362872 ]
Shashikant Banerjee commented on HDFS-13143: -------------------------------------------- Patch v2 addresses the findBug warning. > SnapshotDiff - snapshotDiffReport might be inconsistent if the snapshotDiff > calculation happens between a snapshot and the current tree > --------------------------------------------------------------------------------------------------------------------------------------- > > Key: HDFS-13143 > URL: https://issues.apache.org/jira/browse/HDFS-13143 > Project: Hadoop HDFS > Issue Type: Improvement > Reporter: Shashikant Banerjee > Assignee: Shashikant Banerjee > Priority: Major > Attachments: HDFS-13143.001.patch, HDFS-13143.002.patch > > > HDFS-12594 introduced an iterative approach for computing snapshotDiffs over > multiple rpc calls. The iterative approach depends upon the startPath (path > of the directory with respect to the snapshottable root) and the size of the > createdList (0 in case the startPath refers a file) to exactly determine form > where in each iteration the calculation has to start. > > In case of the diff computation between a snapshot and current tree(if any of > the snapshot names specified in the getSnapshotDiffReport call is null or > empty), the last SnapshotDiff associated with directory/file might change > owing to changes in the current tree in between the rpc calls in the absence > of a global fsn lock. This might result in consistencies in the > snapshotDiffReport. > In case the snapshotDiffReport computation needs to be done between the > current tree and a snapshot, we should fall back to non-iterative approach to > compute snapshotDiff. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org