[HDFS-6783] Fix HDFS CacheReplicationMonitor rescan logic

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 2.6.0
• Component/s: caching
• Hadoop Flags: Reviewed
• Assignee: Yi Liu
• Reporter: Yi Liu
• Created: 30/Jul/14 10:10
• Updated: 12/May/16 18:12
• Resolved: 18/Aug/14 15:36

Description

In monitor thread, needsRescan is set to false before real scan starts, so
for waitForRescanIfNeeded will return for the first condition:

if (!needsRescan) {
  return;
}