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https://issues.apache.org/jira/browse/LOG4J2-1415?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anthony Maire closed LOG4J2-1415.
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tested on master, it works as expected
> Avoid calling toString() on auto-boxed primitive message parameters
> -------------------------------------------------------------------
>
> Key: LOG4J2-1415
> URL: https://issues.apache.org/jira/browse/LOG4J2-1415
> Project: Log4j 2
> Issue Type: Improvement
> Affects Versions: 2.6
> Reporter: Anthony Maire
> Assignee: Remko Popma
> Priority: Minor
> Fix For: 2.6.2
>
>
> When using Log4j 2 through the SLF4J binding, the Unboxer mecanism is not
> available and a parameterized message with a primitive type parameter will be
> auto-boxed.
> Then this boxed value will be formatted by
> ParameterFormatter.recursiveDeepToString() and further allocations will happen
> To lower allocation rate for SLF4J users,
> ParameterFormatter.appendSpecialTypes() should handle boxed primitive types
> too.
> {code}
> private static boolean appendSpecialTypes(final Object o, final StringBuilder
> str) {
> ...
> } else if (o instanceof Long) {
> str.append(((Long) o).longValue());
> return true;
> } else if (o instanceof Integer) {
> str.append(((Integer) o).intValue());
> return true;
> } else if (o instanceof Double) {
> str.append(((Double) o).doubleValue());
> return true;
> } // similarly for float, short, boolean and char.
> ...
> }
> {code}
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