private String getRetryMessage(Object[] args) {
        if (args == null) {
            return "";
        }
        // arguments(final IOException exception, final int executionCount, final HttpContext context)
        final StringBuilder sb = new StringBuilder();
        final Object ex = ArrayUtils.get(args, 0);
        if (ex instanceof Exception) {
            sb.append(ex.getClass().getName()).append(", ");
        }
        final Object executionCount = ArrayUtils.get(args, 1);
        if (executionCount instanceof Integer) {
            sb.append(executionCount);
        }
        return sb.toString();
    }
@author Minwoo Jung
@author jaehong.kim
agent-module/plugins/httpclient4/src/main/java/com/navercorp/pinpoint/plugin/httpclient4/interceptor/DefaultHttpRequestRetryHandlerRetryRequestMethodInterceptor.java