AWS SimpleWorkflow 请求实体太大

Question

我有一个包含大量活动的工作流程。我将每个活动的响应存储在 S3 存储桶中。 我将 S3 键作为输入传递给每个活动。在活动内部，我有一个从 S3 检索数据并执行一些操作的方法。但我的最后一个活动失败并抛出错误：

Caused by: com.amazonaws.AmazonServiceException: Request entity too large (Service: AmazonSimpleWorkflow; Status Code: 413; Error Code: Request entity too large; Request ID: null)
at com.amazonaws.http.AmazonHttpClient.handleErrorResponse(AmazonHttpClient.java:820)
at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:439)
at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:245)
at com.amazonaws.services.simpleworkflow.AmazonSimpleWorkflowClient.invoke(AmazonSimpleWorkflowClient.java:3173)
at com.amazonaws.services.simpleworkflow.AmazonSimpleWorkflowClient.respondActivityTaskFailed(AmazonSimpleWorkflowClient.java:2878)
at com.amazonaws.services.simpleworkflow.flow.worker.SynchronousActivityTaskPoller.respondActivityTaskFailed(SynchronousActivityTaskPoller.java:255)
at com.amazonaws.services.simpleworkflow.flow.worker.SynchronousActivityTaskPoller.respondActivityTaskFailedWithRetry(SynchronousActivityTaskPoller.java:246)
at com.amazonaws.services.simpleworkflow.flow.worker.SynchronousActivityTaskPoller.execute(SynchronousActivityTaskPoller.java:208)
at com.amazonaws.services.simpleworkflow.flow.worker.ActivityTaskPoller$1.run(ActivityTaskPoller.java:97)
... 3 more

我知道 AWS SWF 对数据大小有一些限制，但我只是将 S3 密钥传递给活动。在活动内部，它将从 S3 读取并处理数据。我不确定为什么会收到此错误。如果有人知道，请帮忙！非常感谢！

Answer 1

您的活动失败，因为 respondActivityTaskFailed 在堆栈跟踪中可以看到 SWF API 调用。所以我的猜测是异常消息+堆栈跟踪超出了 SWF 服务允许的最大大小。