[HDFS-2848] hdfs corruption appended to blocks is not detected by fs commands or fsck

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 0.23.0
• Target Version/s: 0.23.1
• Assignee: Ravi Prakash
• Reporter: Ravi Prakash
• Created: 27/Jan/12 00:19
• Updated: 06/Feb/12 15:40
• Resolved: 06/Feb/12 15:40

Description

Courtesy Pat White patwhitey2007

Appears that there is a regression in corrupt block detection by both fsck and fs cmds like 'cat'. Testcases for
pre-block and block-overwrite corruption of all replicas is correctly reporting errors however post-block corruption is
not, fsck on the filesystem reports it's Healthy and 'cat' returns without error. Looking at the DN blocks themselves,
they clearly contain the injected corruption pattern.