英文:

When triggered from SQS, AWS Lambda does not trigger SNS notifications on failure condition

问题

I created AWS Lambda and set that is trigged when some SQS message appears. Lambda is triggered and let's say that fails. I wanted to setup "On failure" destination which triggers SNS topic where I would have Email subscription.

我创建了AWS Lambda，并设置了当出现某个SQS消息时触发它。Lambda被触发，假设它失败了。我想设置“失败时”目标，触发SNS主题，我在其中有电子邮件订阅。

I deliberately made lambda fail, I can see failure in Cloudwatch. However, I didn't received any email from SNS.

我故意让Lambda失败，我可以在Cloudwatch中看到失败。然而，我没有收到来自SNS的任何电子邮件。

To confirm everything actually works regarding SNS and Email subscription I setup S3 as additional trigger to lambda.
In this case, lambda is triggered, failed but I received email from SNS topic configured inside lambda. That means configuration is correct but something is different when source trigger for lambda is SQS rather than S3.

为了确认关于SNS和电子邮件订阅的一切都有效，我将S3设置为Lambda的附加触发器。在这种情况下，Lambda被触发，失败了，但我收到了Lambda内配置的SNS主题的电子邮件。这意味着配置是正确的，但当Lambda的触发源是SQS而不是S3时，有一些不同之处。

What I am missing? Why Lambda is not triggering SNS (or SNS not triggering notifications) when source for lambda is SQS and works perfectly when source is let's say S3?

我缺少什么？为什么当Lambda的触发源是SQS时，Lambda不触发SNS（或SNS不触发通知），而当触发源是S3时，一切都运行完美？

英文:

I created AWS Lambda and set that is trigged when some SQS message appears. Lambda is triggered and let's say that fails. I wanted to setup "On failure" destination which triggers SNS topic where I would have Email subscription.

I deliberately made lambda fail, I can see failure in Cloudwatch. However, I didn't received any email from SNS.

To confirm everything actually works regarding SNS and Email subscription I setup S3 as additional trigger to lambda.
In this case, lambda is triggered, failed but I received email from SNS topic configured inside lambda. That means configuration is correct but something is different when source trigger for lambda is SQS rather than S3.

What I am missing? Why Lambda is not triggering SNS (or SNS not triggering notifications) when source for lambda is SQS and works perfectly when source is let's say S3?

答案1

得分: 1

Lambda的onSuccess / onFailure目标仅支持异步调用1：S3会异步调用您的Lambda，而SQS会同步调用它。

如果您想保持当前的实现，您必须直接将SNS发布放在您的Lambda内部。

英文:

Lambda destinations onSuccess / onFailure are supported only for asynch invocations: S3 calls your Lambda asynchronously, SQS calls it synchronously instead.

If you want to mantain the current implementation, you have to put the SNS publish directly inside your Lambda.