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https://issues.apache.org/jira/browse/LOG4J2-1359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15906209#comment-15906209
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Remko Popma commented on LOG4J2-1359:
-------------------------------------
Is it possible to compile only one class with Java 9 and the rest with Java 7?
We currently delay walking the stack until we need to. Can we do something
similar with capturing the stack? That is, only capture it when a) we're
logging synchronously and one of the pattern converters asks for the caller
location, or b) we're logging asynchronously and we're configured to capture a
stack snapshot before handing over the log event details to the background
thread?
I don't understand what the openjdk devs are suggesting concretely. Can you
point me to something (a specific API, or an example, or an email) that would
clarify?
> Add support for Java 9 StackWalker API in ReflectionUtil
> --------------------------------------------------------
>
> Key: LOG4J2-1359
> URL: https://issues.apache.org/jira/browse/LOG4J2-1359
> Project: Log4j 2
> Issue Type: Improvement
> Components: API
> Environment: Java 1.9+
> Reporter: Matt Sicker
> Assignee: Ralph Goers
> Labels: jdk9
>
> [StackWalker|http://download.java.net/jdk9/docs/api/java/lang/StackWalker.html]
> Based on the functional nature of this API, supporting it may require
> compiling at least one class using javac 1.9 and reflectively loading it in
> ReflectionUtil similar to how Spring supports newer JDK APIs.
> Without support for StackWalker, ReflectionUtil will fall back to using a
> slower API in Java 1.9. This is because the Reflection class is a
> sun-internal class which are no longer exported to non-JDK code without
> setting special command line flags.
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