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https://issues.apache.org/jira/browse/LOG4J2-3230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17462682#comment-17462682
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Peter Malone commented on LOG4J2-3230:
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I'm trying to determine why removing *JndiLookup.class* appears to mitigate
this issue on log4j-core-2.16.0.
I didn't think {*}JndiLookup.clas{*}s interacted with the *ThreadContext*
Lookups at all.
However, prior to removing *JndiLookup.class* I observe the following:
{{}}
{code:java}
2021-12-20 10:36:56,215 main ERROR An exception occurred processing Appender
LogToConsole java.lang.IllegalStateException: Infinite loop in property
interpolation of ::-${::-$${::-j}}: : {code}
{{{}{}}}{{{}{}}}
Upon removal of *JndiLookup.class* I observe the following:
{code:java}
10:42:12.698 [main] INFO TestLog4j ${ctx:EXAMPLE} - test{code}
This is my {*}PatternLayout{*}:
{code:java}
<PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36}
${ctx:EXAMPLE} - %msg%n"/>{code}
And this is the example code:
{code:java}
ThreadContext.put("EXAMPLE", "${${::-${::-$${::-j}}}}");
logger.info("test");{code}
Any ideas? Prior to removing the .class file I've tried setting break points in
*JndiLookup.class* and the execution never gets there so I'm confused by this.
> Certain strings can cause infinite recursion
> --------------------------------------------
>
> Key: LOG4J2-3230
> URL: https://issues.apache.org/jira/browse/LOG4J2-3230
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.8, 2.8.1, 2.8.2, 2.9.0, 2.9.1, 2.10.0, 2.11.0, 2.11.1,
> 2.11.2, 2.12.0, 2.12.1, 2.13.0, 2.13.1, 2.13.2, 2.14.0, 2.13.3, 2.14.1,
> 2.15.0, 2.16.0
> Reporter: Ross Cohen
> Assignee: Carter Kozak
> Priority: Major
> Fix For: 2.17.0
>
> Attachments: sample.tar.gz
>
>
> If a string substitution is attempted for any reason on the following string,
> it will trigger an infinite recursion, and the application will crash:
> ${${::\-${::\-$${::\-j}}}}.
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