java - 将我的 Cordapps 升级到 v4.1 后，我的 Junits 工作正常，但在服务器上出现错误，如何解决此问题？

Question

下面提到了我遇到的错误。

它工作正常，直到最终流程发生变化，并且我将相同的 session 集传递到最终流程中。我知道需要添加参与者，而不仅仅是签名者，在这种情况下他们是相同的。真的很困惑可能导致这个问题的原因。如果 Junits 成功，为什么在服务器上运行 cordapp 时会失败？

net.corda.core.flows.UnexpectedFlowEndException: Tried to access ended session SessionId(toLong=4575033585699842324) with empty buffer
    at net.corda.node.services.statemachine.FlowStateMachineImpl.fillInLocalStackTrace(FlowStateMachineImpl.kt:174) ~[corda-node-4.1.jar:?]
    at net.corda.node.services.statemachine.FlowStateMachineImpl.processEventsUntilFlowIsResumed(FlowStateMachineImpl.kt:162) ~[corda-node-4.1.jar:?]
    at net.corda.node.services.statemachine.FlowStateMachineImpl.suspend(FlowStateMachineImpl.kt:446) ~[corda-node-4.1.jar:?]
    at net.corda.node.services.statemachine.FlowSessionImpl.receive(FlowSessionImpl.kt:67) ~[corda-node-4.1.jar:?]
    at net.corda.node.services.statemachine.FlowSessionImpl.receive(FlowSessionImpl.kt:71) ~[corda-node-4.1.jar:?]
    at net.corda.core.flows.ReceiveTransactionFlow.call(ReceiveTransactionFlow.kt:100) ~[corda-core-4.1.jar:?]
    at net.corda.core.flows.ReceiveTransactionFlow.call(ReceiveTransactionFlow.kt:28) ~[corda-core-4.1.jar:?]
    at net.corda.node.services.statemachine.FlowStateMachineImpl.subFlow(FlowStateMachineImpl.kt:329) ~[corda-node-4.1.jar:?]
    at net.corda.core.flows.FlowLogic.subFlow(FlowLogic.kt:314) ~[corda-core-4.1.jar:?]
    at net.corda.core.flows.ReceiveFinalityFlow.call(FinalityFlow.kt:256) ~[corda-core-4.1.jar:?]
    at net.corda.core.flows.ReceiveFinalityFlow.call(FinalityFlow.kt:251) ~[corda-core-4.1.jar:?]
    at net.corda.node.services.statemachine.FlowStateMachineImpl.subFlow(FlowStateMachineImpl.kt:329) ~[corda-node-4.1.jar:?]
    at net.corda.core.flows.FlowLogic.subFlow(FlowLogic.kt:314) ~[corda-core-4.1.jar:?]
    at com.chainthat.insurance.placement.flow.bermuda.carrier.UploadFirmOrderRiskContractResponderFlow.call(UploadFirmOrderRiskContractResponderFlow.java:53) ~[?:?]
    at com.chainthat.insurance.placement.flow.bermuda.carrier.UploadFirmOrderRiskContractResponderFlow.call(UploadFirmOrderRiskContractResponderFlow.java:15) ~[?:?]
    at net.corda.node.services.statemachine.FlowStateMachineImpl.run(FlowStateMachineImpl.kt:269) ~[corda-node-4.1.jar:?]
    at net.corda.node.services.statemachine.FlowStateMachineImpl.run(FlowStateMachineImpl.kt:45) ~[corda-node-4.1.jar:?]
    at co.paralleluniverse.fibers.Fiber.run1(Fiber.java:1092) ~[quasar-core-0.7.10-jdk8.jar:0.7.10]
    at co.paralleluniverse.fibers.Fiber.exec(Fiber.java:788) ~[quasar-core-0.7.10-jdk8.jar:0.7.10]
    at co.paralleluniverse.fibers.RunnableFiberTask.doExec(RunnableFiberTask.java:100) ~[quasar-core-0.7.10-jdk8.jar:0.7.10]
    at co.paralleluniverse.fibers.RunnableFiberTask.run(RunnableFiberTask.java:91) ~[quasar-core-0.7.10-jdk8.jar:0.7.10]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_211]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_211]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) ~[?:1.8.0_211]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) ~[?:1.8.0_211]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[?:1.8.0_211]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[?:1.8.0_211]
    at net.corda.node.utilities.AffinityExecutor$ServiceAffinityExecutor$1$thread$1.run(AffinityExecutor.kt:63) ~[corda-node-4.1.jar:?]```

Answer 1

这是由于发送和接收未对齐造成的，通常是因为存在 if (states > 0) 等条件。

为了解决您的问题，您需要共享流程代码(启动和响应)。

您可以在 Slack 上将代码私信给我们的一位工程师。