[HDFS-4106] BPServiceActor#lastHeartbeat, lastBlockReport and lastDeletedReport should be declared as volatile

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 2.0.3-alpha
• Component/s: namenode, test
• Hadoop Flags: Reviewed
• Assignee: Jing Zhao
• Reporter: Jing Zhao
• Created: 23/Oct/12 00:24
• Updated: 12/May/16 18:16
• Resolved: 28/Oct/12 19:04

Description

All these variables may be assigned/read by a testing thread (through BPServiceActor#triggerXXX) while also assigned/read by the actor thread. Thus they should be declared as volatile to make sure the "happens-before" consistency.