[jira] [Commented] (LOG4J2-2808) LoggerContext should skip looking up localhost when hostName is configured.

["Maxime Leur (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LOG4J2-2808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17696813#comment-17696813 ] 

Maxime Leur commented on LOG4J2-2808:
-------------------------------------

Hi,

I have same issue on my product (it uses Log4j2 "2.17.1").
But in documenetion, I cannot find a way to add "hostName" to log4j2 configuration.
How I can precisely "configure hostName" on startup in order to prevent Log4j2 to call "NetUtils.getLocalHostname()"?

Regards,
Maxime


> LoggerContext should skip looking up localhost when hostName is configured.
> ---------------------------------------------------------------------------
>
>                 Key: LOG4J2-2808
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-2808
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 2.8.2
>            Reporter: Roy Zhou
>            Assignee: Carter Kozak
>            Priority: Major
>             Fix For: 2.15.0
>
>
> [LoggerContext.java:608|[https://github.com/apache/logging-log4j2/blob/master/log4j-core/src/main/java/org/apache/logging/log4j/core/LoggerContext.java#L608]][1]should use {{computeIfAbsent}} instead of {{putIfAbsent}}.
> When DNS is disabled on certain systems, NetUtils.getLocalHostname() will block and prevent LoggerContext from initializing correctly. When hostName is configured, NetUtils.getLocalHostname() should not be evaluated.
>  
> [1] [https://github.com/apache/logging-log4j2/blob/master/log4j-core/src/main/java/org/apache/logging/log4j/core/LoggerContext.java#L608]



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