Stephen Connolly created LOG4J2-763:
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Summary: Async loggers convert message parameters toString at log
record writing not at log statement execution
Key: LOG4J2-763
URL: https://issues.apache.org/jira/browse/LOG4J2-763
Project: Log4j 2
Issue Type: Bug
Affects Versions: 2.0
Reporter: Stephen Connolly
http://javaadventure.blogspot.com/2014/07/log4j-20-async-loggers-and-immutability.html
TL;DR When using parameterized messages, the toString() method of the log
messages is not called when the log message is enqueued, rather after the log
message has been dequeued for writing. If any of the message parameters are
mutable, they can thus have changed state before the log message is written,
thus resulting in the logged message content being incorrect.
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