[HADOOP-11433] Fix the new findbugs warning from NetUtils&ActiveStandbyElector

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Invalid
• Affects Version/s: 2.7.0
• Component/s: ha, net
• Labels: BB2015-05-TBR
• Target Version/s: 2.8.1
• Hadoop Flags: Reviewed
• Assignee: Liang Xie
• Reporter: Liang Xie
• Created: 19/Dec/14 06:25
• Updated: 29/Mar/17 01:52
• Resolved: 29/Mar/17 01:52

Description

see https://builds.apache.org/job/PreCommit-HADOOP-Build/5309//artifact/patchprocess/newPatchFindbugsWarningshadoop-common.html :

Correctness Warnings

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

Code	Warning
AT	Sequence of calls to java.util.concurrent.ConcurrentHashMap may not be atomic in org.apache.hadoop.net.NetUtils.canonicalizeHost(String)
Bug type AT_OPERATION_SEQUENCE_ON_CONCURRENT_ABSTRACTION (click for details) 
In class org.apache.hadoop.net.NetUtils
In method org.apache.hadoop.net.NetUtils.canonicalizeHost(String)
Type java.util.concurrent.ConcurrentHashMap
Called method java.util.concurrent.ConcurrentHashMap.put(Object, Object)
At NetUtils.java:[line 291]

Issue Links

• is related to: HADOOP-11448 Fix findbugs warnings in FileBasedIPList