[HDFS-6416] Use Time#monotonicNow in OpenFileCtx and OpenFileCtxCatch to avoid system clock bugs

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.4.0
• Fix Version/s: 2.5.0
• Component/s: nfs
• Hadoop Flags: Reviewed
• Assignee: Abhiraj Butala
• Reporter: Brandon Li
• Created: 16/May/14 00:25
• Updated: 15/Aug/14 05:41
• Resolved: 27/May/14 20:26

Description

As cnauroth pointed out in HADOOP-10612, Time#monotonicNow is a more preferred method to use since this isn't subject to system clock bugs (i.e. Someone resets the clock to a time in the past, and then updates don't happen for a long time.)

Issue Links

• relates to: HADOOP-10612 NFS failed to refresh the user group id mapping table