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https://issues.apache.org/jira/browse/ZOOKEEPER-2080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15475420#comment-15475420
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Michael Han commented on ZOOKEEPER-2080:
----------------------------------------

bq. First, it is in general better to keep such synchronized blocks as short as 
possible. 
Absolutely agree. 
bq. Second, shuttingDownLE is being used without synchronization in other parts 
of the code, so either that is broken or we don't need it in the block.
This was noticed earlier as Alex commented:
{noformat}
Quorum peer does this:
if (shuttingDownLE)
{ shuttingDownLE = false; startLeaderElection(); }
Which isn't synchronized now, but probably should be. 
{noformat}
Similarly I can't prove on paper if this should be sync-ed or not. Need more 
investigation.

> ReconfigRecoveryTest fails intermittently
> -----------------------------------------
>
>                 Key: ZOOKEEPER-2080
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2080
>             Project: ZooKeeper
>          Issue Type: Sub-task
>            Reporter: Ted Yu
>            Assignee: Michael Han
>             Fix For: 3.5.3, 3.6.0
>
>         Attachments: ZOOKEEPER-2080.patch, ZOOKEEPER-2080.patch, 
> ZOOKEEPER-2080.patch, ZOOKEEPER-2080.patch, 
> jacoco-ZOOKEEPER-2080.unzip-grows-to-70MB.7z, repro-20150816.log, 
> threaddump.log
>
>
> I got the following test failure on MacBook with trunk code:
> {code}
> Testcase: testCurrentObserverIsParticipantInNewConfig took 93.628 sec
>   FAILED
> waiting for server 2 being up
> junit.framework.AssertionFailedError: waiting for server 2 being up
>   at 
> org.apache.zookeeper.server.quorum.ReconfigRecoveryTest.testCurrentObserverIsParticipantInNewConfig(ReconfigRecoveryTest.java:529)
>   at 
> org.apache.zookeeper.JUnit4ZKTestRunner$LoggedInvokeMethod.evaluate(JUnit4ZKTestRunner.java:52)
> {code}



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