问题
一句话
SNS 主题向 HTTPs 订阅者发送了太多通知。
更详细
我已在其中一个 S3 存储桶中启用事件,并且已通过 订阅了其中一个应用程序SNS Topic
。HTTPS
一切都运行正常,直到今天,我的应用程序开始花费太长时间响应。
重启 EC2 实例后,发现问题仍然存在,我通过 SSH 连接到 EC2 实例,发现几乎立即连接,命令执行时没有明显的延迟。所以我知道问题不在于实例网络。
我去检查了 apache 日志,发现每秒有数百(甚至数千)个 POST 请求。请参阅下面的日志片段。
问题)
有没有办法查看是否是 S3 将所有这些通知事件发送到 SNS?
此外,这可能是因为 S3 每秒接收那么多的上传数据,这可能吗?
最后,除了简单地取消订阅该主题之外,我还能做些什么来阻止这种情况?
Apache 日志:
72.21.217.87 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.133 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 6404 "-" "Amazon Simple Notification Service Agent"
72.21.217.141 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.139 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.75 - - [02/Mar/2017:15:33:51 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.182 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.137 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.157 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.161 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.139 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.156 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 6404 "-" "Amazon Simple Notification Service Agent"
72.21.217.70 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.135 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.152 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.113 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.83 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.158 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.129 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.75 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.156 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.64 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.134 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.130 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.86 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.167 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.135 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.169 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.76 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.75 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 6404 "-" "Amazon Simple Notification Service Agent"
72.21.217.79 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.180 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.75 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.80 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.74 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 6404 "-" "Amazon Simple Notification Service Agent"
72.21.217.137 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.155 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.87 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.152 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.130 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.161 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
72.21.217.74 - - [02/Mar/2017:15:33:52 -0500] "POST /notifications HTTP/1.1" 500 619 "-" "Amazon Simple Notification Service Agent"
[更新]
仔细查看日志后,我发现我的应用程序正在响应500
。起初我以为是 Apache2,因为它收到了太多请求。我猜 SNS 在没有收到成功消息时会继续重新发送消息(无限期?)。
[更新 2]
我能够获取发送的通知,它是“ObjectRemoved:Delete”,表示文件已删除。该文件不再存在于存储桶中。
我按照@EEAA 的建议通过电子邮件订阅了不到 15 秒,针对同一条通知,我收到了 252 封电子邮件,并且还在继续增加:[。
[更新 3]
检查了SNS主题的传递策略,并确认重试次数设置为3!
注意:截至目前,我已收到来自 S3 的近 900 条通知。我还注意到和x-amz-request-id
总是x-amz-id-2
不同,这是什么意思?
答案1
几点:
- 这些 IP 都分配给了亚马逊,所以我们知道流量来自亚马逊的网络。
- 您的服务器响应了 500 错误代码。这是故意的吗?
- 您应该能够执行数据包捕获来查看
POST
数据。 - 如果您无法执行数据包捕获,您也可以通过电子邮件订阅 SNS 主题,以获取非常短时间内,SNS 消息的详细信息将会发送到您的电子邮箱。