leak（一）

0

 

 服务对外内存oom，但健康检测还能访问，因为健康检测走8081直接，走的jvm内存

 

1 使用netty自带的泄露参数 -Dio.netty.leakDetectionLevel=advanced

https://zhuanlan.zhihu.com/p/624117573?utm_id=0

 

 

30000 https网关，20000为http代理-》8081

反复访问https://localhost:30000

 

 

 

2 压力测试直到OOM

2.1 初始给10k -XX:MaxDirectMemorySize=10k

警告: An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
io.netty.util.internal.OutOfDirectMemoryError: failed to allocate 16384 byte(s) of direct memory (used: 1031, max: 10240)

 

2.2 给100k

压力代码：

package com.jds.test.httpproxy.miniserver;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.impl.client.CloseableHttpClient;

import java.io.IOException;

/**
 * Created by mac on 2024/4/6.
 */
public class Test {

    public static void main(String []f) {
        for(int i=0; i<200; ++i) {
            main0(i);
        }

    }
    public static void main0(int f) {

        CloseableHttpClient httpClient = null;
        try {

            HttpRequestBase httpUriRequest = null;
            httpClient = HttpServerJob.HttpClientFactory.createSSLClientDefault(null, null);
            httpUriRequest = new HttpGet("https://localhost:30000");
            RequestConfig.Builder builder = RequestConfig.custom();
            builder.setRedirectsEnabled(false).setConnectTimeout(10000).setSocketTimeout(100000);
            httpUriRequest.setConfig(builder.build());
            CloseableHttpResponse response = httpClient.execute(httpUriRequest);

            int ret = response.getStatusLine().getStatusCode();
            System.out.println(f+""+ret);

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (httpClient != null) {
                try {
                    httpClient.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

}

 

第15个请求挂了

这个文件大小为6k，6*14=84

 

四月 07, 2024 12:19:00 上午 io.netty.channel.DefaultChannelPipeline onUnhandledInboundException
警告: An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
io.netty.util.internal.OutOfDirectMemoryError: failed to allocate 3840 byte(s) of direct memory (used: 98567, max: 102400)

 

 

ScheduledExecutorService scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
scheduledExecutorService.scheduleAtFixedRate(()->{
    System.out.println("used direct memory: " + PlatformDependent.usedDirectMemory());
}, 1, 1, TimeUnit.SECONDS);

used direct memory: 0

used direct memory: 37029

used direct memory: 98311
used direct memory: 98311
used direct memory: 98311
used direct memory: 98311

 

2.3 after

200个完成

used direct memory: 0
used direct memory: 2130

used direct memory: 2213

used direct memory: 2213

used direct memory: 2213

used direct memory: 2213

used direct memory: 7

used direct memory: 7

used direct memory: 7

used direct memory: 7

used direct memory: 7

 

2.4 windows （java11）下100k 2000个请求都没问题，只是提示有leak，usedDirectMemory=-1, 而且MaxDirectMemorySize是设置成功的，因为可以复现2.1

3 原服务压测BC AC

3.1 BC

考虑一个js，大小为949k，uat对外内存为2G，2*1024*1024/949=about2000，

也就是说2000次请求后，uat应该挂掉

结果没挂。。

 

3.2 AC

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