[HADOOP-11483] HardLink.java should use the jdk7 createLink method

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.0
• Fix Version/s: 2.7.0
• Target Version/s: 2.7.0
• Hadoop Flags: Reviewed
• Assignee: Akira Ajisaka
• Reporter: Colin McCabe
• Created: 19/Dec/14 21:30
• Updated: 10/Apr/15 20:04
• Resolved: 15/Jan/15 12:04

Description

Now that we are using jdk7, HardLink.java should use the jdk7 createLink method rather than our shell commands or JNI methods.

Note that we cannot remove all of the JNI / shell commands unless we remove the code which is checking the link count, something that jdk7 doesn't provide (at least, I don't think it does)

Issue Links

• relates to: HDFS-7443 Datanode upgrade to BLOCKID_BASED_LAYOUT fails if duplicate block files are present in the same volume