Jmeter Nginx Stress Test Error Rate Higher

I have a JSF web application runs on Glassfish Application Server. I’m
using Nginx with reverse proxing to Glassfish. I wanna see performance
gains with Nginx, i’m testing application with JMeter. When i directly
test the application on glassfish, there ise no error count. But, when i
tested the application via Nginx response contains a lot of error count
approx. %80. I changed some time out in nginx configuration file then no
thing changed.

My Nginx Conf file;

worker_processes 3;
worker_rlimit_nofile 1024;
worker_priority -6;

events {
multi_accept on;
worker_connections 1024;

http {
include mime.types;
default_type application/octet-stream;

sendfile        on;

keepalive_timeout 120m ;

server {
    listen       8070;
    server_name  localhost;
    root "html";

    location ~* \.(jpg|jpeg|gif|css|png|js|ico)$ {
    access_log off;
    expires max;

    location / {

    access_log off;

    proxy_pass http://localhost:8080/; >> to Glassfish port

    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_read_timeout 120m;
    proxy_connect_timeout 120m;


    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   html;



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