[HDFS-10485] Fix findbugs warning in FSEditLog.java

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Target Version/s: 2.9.0
• Assignee: Akira Ajisaka
• Reporter: Akira Ajisaka
• Created: 03/Jun/16 15:44
• Updated: 06/Jan/17 08:08
• Resolved: 07/Jun/16 08:54

Description

Found 1 findbugs warning when creating a patch for branch-2 in HDFS-10341 (https://builds.apache.org/job/PreCommit-HDFS-Build/15639/artifact/patchprocess/branch-findbugs-hadoop-hdfs-project_hadoop-hdfs-warnings.html)

Inconsistent synchronization of org.apache.hadoop.hdfs.server.namenode.FSEditLog.numTransactionsBatchedInSync; locked 50% of time
Bug type IS2_INCONSISTENT_SYNC (click for details) 
In class org.apache.hadoop.hdfs.server.namenode.FSEditLog
Field org.apache.hadoop.hdfs.server.namenode.FSEditLog.numTransactionsBatchedInSync
Synchronized 50% of the time
Unsynchronized access at FSEditLog.java:[line 676]
Unsynchronized access at FSEditLog.java:[line 676]
Synchronized access at FSEditLog.java:[line 1254]
Synchronized access at FSEditLog.java:[line 716]