Image loader should make sure to read every byte in image file
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Key: HDFS-1524
URL: https://issues.apache.org/jira/browse/HDFS-1524
Project: Hadoop HDFS
Issue Type: Bug
Components: name-node
Affects Versions: 0.22.0, 0.23.0
Reporter: Hairong Kuang
Assignee: Hairong Kuang
Fix For: 0.22.0, 0.23.0
When I work on HDFS-1070, I come across a very strange bug. Occasionally when
loading a compressed image, NameNode throws an exception complaining that the
image file is corrupt. However, the result returned by the md5sum utility
matches the checksum value stored in the VERSION file.
It turns out the image loader leaves 4 bytes unread after loading all the real
data of an image. Those unread bytes may be some compression-related meta-info.
The image loader should make sure to read to the end of file in order for an
correct checksum.
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