Description
https://issues.apache.org/jira/browse/CXF-4392 issue has introduced special method for logged message format.
All log(logger, buffer.toString()); strings have been replaced by log(logger, formatLoggingMessage(buffer));
But current version of LoggingOutInterceptor.LogWriter.close() contains log(..) method call without format:
https://github.com/apache/cxf/blob/3dc89fe00c4e4165fc7b9c25ca0faec4ef097a87/core/src/main/java/org/apache/cxf/interceptor/LoggingOutInterceptor.java#L180
Therefore format of logged message is impossible for the Writer case.