[HDFS-5884] LoadDelegator should use IOUtils.readFully() to read the magic header

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: HDFS-5698 (FSImage in protobuf)
• Fix Version/s: HDFS-5698 (FSImage in protobuf)
• Target Version/s: HDFS-5698 (FSImage in protobuf)
• Hadoop Flags: Reviewed
• Assignee: Haohui Mai
• Reporter: Haohui Mai
• Created: 04/Feb/14 22:26
• Updated: 04/Feb/14 23:17
• Resolved: 04/Feb/14 23:17

Description

Currently FSImageFormat.LoadDelegator reads the magic header using FileInputStream.read(). It does not guarantee that the magic header is fully read. It should use IOUtils.readFully() instead.