[HDFS-7753] Fix Multithreaded correctness Warnings in BackupImage.java

• Type: Bug
• 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: Konstantin Shvachko
• Reporter: Rakesh Radhakrishnan
• Created: 08/Feb/15 17:53
• Updated: 10/Apr/15 20:29
• Resolved: 11/Feb/15 08:57

Description

Inconsistent synchronization of org.apache.hadoop.hdfs.server.namenode.BackupImage.namesystem; locked 60% of time

Bug type IS2_INCONSISTENT_SYNC (click for details) 
In class org.apache.hadoop.hdfs.server.namenode.BackupImage
Field org.apache.hadoop.hdfs.server.namenode.BackupImage.namesystem
Synchronized 60% of the time
Unsynchronized access at BackupImage.java:[line 97]
Unsynchronized access at BackupImage.java:[line 261]
Synchronized access at BackupImage.java:[line 197]
Synchronized access at BackupImage.java:[line 212]
Synchronized access at BackupImage.java:[line 295]

https://builds.apache.org/job/PreCommit-HDFS-Build/9493//artifact/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html#Details

Issue Links

• is duplicated by: HDFS-7754 Fix findbugs warning produced by HDFS-7710