Question

我在我的应用程序中使用SWF，我使用ExponentialRetry持续轮询活动结果。但有时活动导致START_TO_CLOSE超时。对于我的所有工作流程都不会发生这种情况，并且通过使调试/重现变得困难而发生在30中。从决策者日志我可以看到如下。有人可以解释一下这个问题是什么吗？

com.amazon.metrics.swf.AwsSwfMetricsRequestHandler: An error was thrown in previous decision in the thread <SWF Decider AWSFuncTaskList_110.0 7>, task-token <AAAAKgAAAAIAAAAAAAAAAgwtVps42342343434343A3hvItwKY0Vav/Kpexk2cat5fsWkiN1SxhfeoRwVgl+F2/EZQrhBP4RoA41LmLLC77WLU26uSMXaVnl+Cz64x+RZP0sBzofJWdAOdiwHAzsePFNQETXfyl+HibRiYxxO4Xyxn8ndVQ50f97W3IKkwrO7mySJSXbpe6Yaw/AiPmi4f6VoqQo/+nhRSEbzQpKNQeZAaCcAB/6oxEKOgYbW75AF9JsPbZEOdYE7Kq2JVjyghP2id9xAGKgj3ww3d1UBoRFxlulSUsNJmlpgR2+HPyWDHZKF7ECw==>, workflow-execution <RiskAnalysis-313434142331@22NB47i321UtA7w9dPnUTmmtKMeIP1DWrepdAJb0WdGqc=>, domain <Prod>, workflow-type <RiskAnalysisWF@1.7>
        at com.amazon.metrics.swf.DecisionsMetricsExtractor.internalHandlePollForDecisionTask(DecisionsMetricsExtractor.java:183)
        at com.amazon.metrics.swf.DecisionsMetricsExtractor.handlePollForDecisionTask(DecisionsMetricsExtractor.java:168)
        at com.amazon.metrics.swf.AwsSwfMetricsRequestHandler.handlePollForDecisionTask(AwsSwfMetricsRequestHandler.java:508)
        at com.amazon.metrics.swf.AwsSwfMetricsRequestHandler.extractMetrics(AwsSwfMetricsRequestHandler.java:362)
        at com.amazon.metrics.sdk.AwsSdkMetricsRequestHandler.handleCall(AwsSdkMetricsRequestHandler.java:218)
        at com.amazon.metrics.sdk.AwsSdkMetricsRequestHandler.afterResponse(AwsSdkMetricsRequestHandler.java:196)
        at com.amazonaws.http.AmazonHttpClient$RequestExecutor.afterResponse(AmazonHttpClient.java:975)
        at com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:746)
        at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:717)
        at com.amazonaws.http.AmazonHttpClient$RequestExecutor.execute(AmazonHttpClient.java:699)
        at com.amazonaws.http.AmazonHttpClient$RequestExecutor.access$500(AmazonHttpClient.java:667)
        at com.amazonaws.http.AmazonHttpClient$RequestExecutionBuilderImpl.execute(AmazonHttpClient.java:649)
        at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:513)
        at com.amazonaws.services.simpleworkflow.AmazonSimpleWorkflowClient.doInvoke(AmazonSimpleWorkflowClient.java:3390)
        at com.amazonaws.services.simpleworkflow.AmazonSimpleWorkflowClient.invoke(AmazonSimpleWorkflowClient.java:3366)
        at com.amazonaws.services.simpleworkflow.AmazonSimpleWorkflowClient.executePollForDecisionTask(AmazonSimpleWorkflowClient.java:2112)
        at com.amazonaws.services.simpleworkflow.AmazonSimpleWorkflowClient.pollForDecisionTask(AmazonSimpleWorkflowClient.java:2088)
        at com.amazonaws.services.simpleworkflow.flow.worker.DecisionTaskPoller.poll(DecisionTaskPoller.java:191)
        at com.amazonaws.services.simpleworkflow.flow.worker.DecisionTaskPoller.access$000(DecisionTaskPoller.java:39)
        at com.amazonaws.services.simpleworkflow.flow.worker.DecisionTaskPoller$DecisionTaskIterator.next(DecisionTaskPoller.java:71)
        at com.amazonaws.services.simpleworkflow.flow.worker.DecisionTaskPoller$DecisionTaskIterator.next(DecisionTaskPoller.java:45)
        at com.amazonaws.services.simpleworkflow.flow.worker.HistoryHelper$EventsIterator.<init>(HistoryHelper.java:269)
        at com.amazonaws.services.simpleworkflow.flow.worker.HistoryHelper$SingleDecisionEventsIterator.<init>(HistoryHelper.java:74)
        at com.amazonaws.services.simpleworkflow.flow.worker.HistoryHelper.<init>(HistoryHelper.java:318)
        at com.amazonaws.services.simpleworkflow.flow.worker.AsyncDecisionTaskHandler.handleDecisionTask(AsyncDecisionTaskHandler.java:73)
        at com.amazonaws.services.simpleworkflow.flow.worker.DecisionTaskPoller.pollAndProcessSingleTask(DecisionTaskPoller.java:223)
        at com.amazonaws.services.simpleworkflow.flow.worker.GenericWorker$PollServiceTask.run(GenericWorker.java:85)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)

Answer 1

所有活动在创建时都有startToCloseTimeout（由决策者提供）。如果未明确指定，则使用SWF中为该活动定义的default from the versioned ActivityType。您正在达到超时，因为您的重试允许您超过配置的超时。如果您认为自己需要更多时间，那么在创建活动时，您需要指定startToCloseTimeout as a larger value in the scheduleActivityTaskDecision。

SWF工作流程导致START_TO_CLOSE用于所选工作流程

1 个答案: