Docker运行k6脚本触发空指针引用Panic问题求助

异常日志 #

panic: runtime error: invalid memory address or nil pointer dereference
    [signal SIGSEGV: segmentation violation code=0x1 addr=0x38 pc=0xec5b8f]
    
    goroutine 46 [running]:
    github.com/grafana/xk6-browser/common.(*Frame).requestByID(0xc00219c540, {0xc00034b350, 0x6})
        github.com/grafana/xk6-browser@v1.4.2/common/frame.go:435 +0x54f
    github.com/grafana/xk6-browser/common.(*FrameManager).requestFailed(0xc002da4000, 0xc002c0e3c0, 0x1)
        github.com/grafana/xk6-browser@v1.4.2/common/frame_manager.go:454 +0x4d7
    github.com/grafana/xk6-browser/common.(*NetworkManager).onLoadingFailed(0xc0009b1100, 0xc000c76300)
        github.com/grafana/xk6-browser@v1.4.2/common/network_manager.go:375 +0x112
    github.com/grafana/xk6-browser/common.(*NetworkManager).handleEvents(0xc0009b1100, 0xc003a42720)
        github.com/grafana/xk6-browser@v1.4.2/common/network_manager.go:347 +0x286
    github.com/grafana/xk6-browser/common.(*NetworkManager).initEvents.func1()
        github.com/grafana/xk6-browser@v1.4.2/common/network_manager.go:330 +0x37
    created by github.com/grafana/xk6-browser/common.(*NetworkManager).initEvents
        github.com/grafana/xk6-browser@v1.4.2/common/network_manager.go:329 +0x14d

使用的Dockerfile #

FROM golang:1.20-bullseye as builder

RUN go install -trimpath go.k6.io/xk6/cmd/xk6@latest

RUN  xk6 build --output "/tmp/k6" --with github.com/grafana/xk6-browser

# Create grafana.ini file with the necessary configuration
RUN echo "wal = true" > /tmp/grafana.ini

FROM debian:bullseye

RUN apt-get update && \
    apt-get install -y chromium

COPY --from=builder /tmp/k6 /usr/bin/k6

# Copy the grafana.ini file
COPY --from=builder /tmp/grafana.ini /etc/grafana.ini

ENV K6_BROWSER_HEADLESS=true

#ENTRYPOINT ["k6"]

WORKDIR /k6-performance-test

COPY Browser_Test/chaostestingt.js .
COPY users.json .
COPY profiles.json .

CMD ["k6", "run", "chaostestingt.js"]

关键场景信息 #

• 仅Docker环境触发异常，本地运行同一脚本无问题
• 期间未修改任何代码、配置
• 异常集中在第二次执行await page.goto(url)时，首次加载该URL正常

解决思路 #

1. 升级xk6-browser版本
   当前使用的v1.4.2存在已知空指针bug，后续版本（如v1.4.3及以上）已修复类似Frame请求处理问题。修改Dockerfile构建命令，指定新版本：

xk6 build --output "/tmp/k6" --with github.com/grafana/xk6-browser@v1.4.3

2. 添加页面导航等待逻辑
   第二次goto时可能页面资源未完全释放，添加等待确保状态稳定：

await page.goto(url);
await page.waitForLoadState('networkidle'); // 等待网络空闲状态

3. 固定Chromium版本
   Docker中安装的Chromium可能自动更新到与xk6-browser v1.4.2不兼容的版本，指定固定版本安装：

RUN apt-get install -y chromium=114.0.5735.198-1~deb11u1

4. 强制重新构建镜像
   清理Docker缓存，避免旧依赖残留：

docker build --no-cache -t your-k6-image .

内容的提问来源于stack exchange，提问作者user2862093