carterkozak commented on a change in pull request #544:
URL: https://github.com/apache/logging-log4j2/pull/544#discussion_r665376798
##########
File path:
log4j-core/src/main/java/org/apache/logging/log4j/core/pattern/NamePatternConverter.java
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@@ -29,6 +32,11 @@
*/
private final NameAbbreviator abbreviator;
+ /**
+ * Cache of previously encountered inputs (keys) and conversion results
(values).
+ */
+ private final Map<String, String> conversionCache = new
ConcurrentHashMap<>();
Review comment:
I'm aware of applications which create an unbounded number of loggers
using `LogManager.getLogger("resource." + resourceId)` to log a small amount of
data. Such usage is expensive, and not good practice, but it shouldn't result
in a memory leak.
I imagine if performance of abbreviation is a problem, we can improve that
instead of adding caches. I'm generally a bit biased against using caches
unless it's the only option, they're hard to monitor, maintain, debug, and
reason about imo.
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