[HADOOP-11459] Fix recent findbugs in ActiveStandbyElector, NetUtils and ShellBasedIdMapping

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.7.0
• Target Version/s: 2.7.0
• Hadoop Flags: Reviewed
• Assignee: Vinayakumar B
• Reporter: Vinayakumar B
• Created: 05/Jan/15 10:12
• Updated: 10/Apr/15 20:04
• Resolved: 06/Jan/15 03:48

Description

Fix findbugs in the latest jenkins which causing QA builds to fail.

Return value of java.util.concurrent.CountDownLatch.await(long, TimeUnit) ignored in org.apache.hadoop.ha.ActiveStandbyElector$WatcherWithClientRef.process(WatchedEvent)

Sequence of calls to java.util.concurrent.ConcurrentHashMap may not be atomic in org.apache.hadoop.net.NetUtils.canonicalizeHost(String)

Inconsistent synchronization of org.apache.hadoop.security.ShellBasedIdMapping.staticMapping; locked 88% of time