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From "Yu Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15148) Resolve IS2_INCONSISTENT_SYNC findbugs warnings in AuthenticationTokenSecretManager
Date Fri, 22 Jan 2016 08:39:39 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15112102#comment-15112102
] 

Yu Li commented on HBASE-15148:
-------------------------------

In the latest report, from the log of the failed TestGenerateDelegationToken case:
{noformat}
java.net.BindException: Address already in use
	at sun.nio.ch.Net.bind0(Native Method)
	at sun.nio.ch.Net.bind(Net.java:444)
	at sun.nio.ch.Net.bind(Net.java:436)
{noformat}
I should be an env issue

In previous report, there are mainly two failures: TestRegionMergeTransactionOnCluster and
TestStochasticLoadBalancer, and they are frequently flaked in recent runs like HBASE-15152.

Given the status, I believe the patch here is safe.

> Resolve IS2_INCONSISTENT_SYNC findbugs warnings in AuthenticationTokenSecretManager
> -----------------------------------------------------------------------------------
>
>                 Key: HBASE-15148
>                 URL: https://issues.apache.org/jira/browse/HBASE-15148
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Yu Li
>            Assignee: Yu Li
>             Fix For: 2.0.0, 1.2.0, 1.3.0
>
>         Attachments: HBASE-15148.patch, HBASE-15148.patch
>
>
> After efforts in HBASE-15118, we still see IS2_INCONSISTENT_SYNC warning in AuthenticationTokenSecretManager
in [HadoopQA report | https://builds.apache.org/job/PreCommit-HBASE-Build/197/artifact/patchprocess/branch-findbugs-hbase-server-warnings.html]
for HBASE-13960:
> {noformat}
> In class org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager
> Field org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager.lastKeyUpdate
> Synchronized 50% of the time
> Unsynchronized access at AuthenticationTokenSecretManager.java:[line 343]
> Synchronized access at AuthenticationTokenSecretManager.java:[line 278]
> {noformat}
> Checking the code, we could see {{synchronized (this)}} in line 343 is synchronizing
on the instance of the subclass {{AuthenticationTokenSecretManager$LeaderElector}} while {{lastKeyUpdate}}
is a variable of the parent class instance
> Will fix the issue in this JIRA



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