Description
1. Add getCorruptFiles method to FSNamesystem (the getCorruptFiles method is in branch-0.21 but not in branch-1).
2. Backport HDFS-1031: display corrupt files in WebUI.
1. Add getCorruptFiles method to FSNamesystem (the getCorruptFiles method is in branch-0.21 but not in branch-1).
2. Backport HDFS-1031: display corrupt files in WebUI.