text: [
  ]
  Aditya Kishore updated HBASE-6236:
  ----------------------------------
  Attachment: HBASE-6236_0.94.patch
  HBASE-6236_trunk.patch
  > Offline meta repair fails if the HBase base mount point is on a different cluster/volume
  than its parent in a ViewFS or similar FS
  > ----------------------------------------------------------------------------------------------------------------------------------
  >
  > Key: HBASE-6236
  > URL:
  > Project: HBase
  > Issue Type: Bug
  > Components: hbck
  > Reporter: Aditya Kishore
  > Assignee: Aditya Kishore
  > Attachments: HBASE-6236_0.94.patch, HBASE-6236_trunk.patch
  >
  >
  > While building the .META. and -ROOT- from FS data alone (HBASE-4377), hbck tries to move
  the existing .META. and -ROOT- directories to a backup folder.
  > This backup folder is created at the same level as the base HBase folder (e.g. /hbase-xxxxxx
  if the base HBase folder is '/hbase').
  > In a federated HDFS like ViewFS and other similar FS implementations, it is not possible
  to rename files/directories across namespace volumes (ViewFS guide section 3.5) and as a result
  hbck crashes.
  > A solution to this problem is to create the backup directory under the folder where HBase
  base folder has been mounted. This ensures that source and destination of rename operation
  are on the same namespace volume.
  > Patch for 0.94 and trunk is attached for review. The patch modifies the location of the
  backup directory from '/hbase-xxxxxxx' to '/hbase/.hbcktmp-xxxxxxx'
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