default Mono<Void> release(final CachedBodyOutputMessage outputMessage, final Throwable throwable) {
        if (Boolean.TRUE.equals(outputMessage.getCache())) {
            return outputMessage.getBody().map(DataBufferUtils::release).then(Mono.error(throwable));
        }
        return Mono.error(throwable);
    }
Clean buffer.

@param outputMessage output
@param throwable     throwable
@return mono
shenyu-plugin/shenyu-plugin-param-mapping/src/main/java/org/apache/shenyu/plugin/param/mapping/strategy/Operator.java