ppkarwasz opened a new pull request, #3553:
URL: https://github.com/apache/logging-log4j2/pull/3553
This change splits the "don't use String concatenation" best practice into
two parts:
- A recommendation concerning performance: string concatenation is not
efficient if the logger is off.
- A security recommendation: format string must be constants to prevent `{}`
placeholder injection.
The `${dangerousLookup}` part of the example is removed, since lookups are
not executed since version `2.15.0`
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