Paul Burrowes created LOG4J2-2005:
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Summary: Level.valueOf() converts level strings to uppercase
Key: LOG4J2-2005
URL: https://issues.apache.org/jira/browse/LOG4J2-2005
Project: Log4j 2
Issue Type: Bug
Components: Core
Affects Versions: 2.8.2
Reporter: Paul Burrowes
When using custom levels that are not all uppercase the serialized level
strings are not deserializable back into levels because Level.valueOf() assumes
all levels will be uppercase.
https://logging.apache.org/log4j/2.x/manual/customloglevels.html says that
levels are case sensitive and the convention is to use uppercase. Having the
convention mandatory in code breaks all cases where the level name has already
been standardised as mixed case.
The fix is simple, Level.valueOf() should not convert levelName to uppercase.
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