2018年3月14日星期三

Magento2开发教程 - 503（Backend Fetch Failed后端获取失败）解决方法

如果Magento2缓存标签使用长度超过8192个字符，你可以看到HTTP 503（后台读取失败）在浏览器中的错误。这些错误可能显示如下：
Error 503 Backend fetch failed
Backend fetch failed
为了解决这个问题，修改varnish配置文件如下:
  1. 用 root 用户打开:
    • CentOS 6: /etc/sysconfig/varnish
    • CentOS 7: /etc/varnish/varnish.params
    • Ubuntu: /etc/default/varnish
  2. 搜索 http_resp_hdr_len 参数.
  3. 如果参数不存在增加 thread_pool_max.
  4. 设置 http_resp_hdr_len
    示例:
    -p http_resp_hdr_len=64000 \
    代码片段:
    # DAEMON_OPTS is used by the init script.
DAEMON_OPTS="-a ${VARNISH_LISTEN_ADDRESS}:${VARNISH_LISTEN_PORT} \
     -f ${VARNISH_VCL_CONF} \
     -T ${VARNISH_ADMIN_LISTEN_ADDRESS}:${VARNISH_ADMIN_LISTEN_PORT} \
     -p thread_pool_min=${VARNISH_MIN_THREADS} \
     -p thread_pool_max=${VARNISH_MAX_THREADS} \
     -p http_resp_hdr_len=64000 \
     -S ${VARNISH_SECRET_FILE} \
     -s ${VARNISH_STORAGE}"
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