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https://issues.apache.org/jira/browse/LOG4J2-3231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17459590#comment-17459590
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ASF subversion and git services commented on LOG4J2-3231:
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Commit d38b85984248bd267fbdd6ece72a0e4941de5773 in logging-log4j2's branch
refs/heads/release-2.x from Gary Gregory
[ https://gitbox.apache.org/repos/asf?p=logging-log4j2.git;h=d38b859 ]
Add JndiManagerTest looking for LOG4J2-3231.
> JndiManager.isJndiEnabled generates a call to NetUtils.getLocalIps
> ------------------------------------------------------------------
>
> Key: LOG4J2-3231
> URL: https://issues.apache.org/jira/browse/LOG4J2-3231
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.16.0
> Reporter: Phong X. Nguyen
> Priority: Major
>
> While trying to upgrade from 2.15.0 to 2.16.0, we discovered some of our unit
> tests were failing. On further investigation, we realized that the new
> {{JndiManager.isJndiEnabled()}} method, on first call, causes initialization
> of all static members of {{{}JndiManager{}}}, including a call to
> {{{}NetUtils.getLocalIps{}}}. In at least one of our unit test frameworks,
> this generates a NullPointerException.
> Could some of the {{permanentAllowed}} lists initialization be deferred to
> avoid this issue?
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