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https://issues.apache.org/jira/browse/LOG4J2-1475?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17020401#comment-17020401
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Art Licis commented on LOG4J2-1475:
-----------------------------------
This issue was created against v 2.6. For that version, it wasn't possible to
prevent this lookup functionality.
However, since version 2.7 it's possible to avoid this by using %m\{nolookups}
pattern.
And version 2.10 introduced log4j2.formatMsgNoLookups setting which is false by
default, but can be changed to true to globally avoid lookups in messages.
> High CPU utilization if large log message contains '${'
> -------------------------------------------------------
>
> Key: LOG4J2-1475
> URL: https://issues.apache.org/jira/browse/LOG4J2-1475
> Project: Log4j 2
> Issue Type: Bug
> Components: Layouts, Pattern Converters
> Affects Versions: 2.6.2
> Environment: JDK 7u80
> Reporter: Hikaru Abe
> Priority: Minor
> Attachments: dollar-braces.txt, log4j2.xml
>
>
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