In Corda 3.3, I have defined the following flow:
@InitiatingFlow
class CollectSignaturesInitiatingFlow(val signedTransaction: SignedTransaction, val parties: List<Party>): FlowLogic<SignedTransaction>() {
override fun call(): SignedTransaction {
val sessions = parties.map { initiateFlow(it) }
return subFlow(CollectSignaturesFlow(signedTransaction, sessions))
}
}
When my node executes this flow, I receive the exception below. What is the cause?
[WARN ] 16:03:05,481 [Node thread-1] (FlowStateMachineImpl.kt:111) flow.[55214e22-74aa-4f1b-a94d-6353d5bbf35d].run - Terminated by unexpected exception {} java.lang.NullPointerException: null at net.corda.node.services.statemachine.FlowStateMachineImpl.suspend(FlowStateMachineImpl.kt:514) ~[corda-node-3.2-corda.jar:?] at net.corda.node.services.statemachine.FlowStateMachineImpl.sendInternal(FlowStateMachineImpl.kt:370) ~[corda-node-3.2-corda.jar:?] at net.corda.node.services.statemachine.FlowStateMachineImpl.initiateSession(FlowStateMachineImpl.kt:434) ~[corda-node-3.2-corda.jar:?] at net.corda.node.services.statemachine.FlowStateMachineImpl.sendAndReceive(FlowStateMachineImpl.kt:198) ~[corda-node-3.2-corda.jar:?] at net.corda.node.services.statemachine.FlowSessionImpl.sendAndReceive(FlowSessionImpl.kt:29) ~[corda-node-3.2-corda.jar:?] at net.corda.node.services.statemachine.FlowSessionImpl.sendAndReceive(FlowSessionImpl.kt:40) ~[corda-node-3.2-corda.jar:?] at net.corda.core.flows.DataVendingFlow.sendPayloadAndReceiveDataRequest(SendTransactionFlow.kt:70) ~[corda-core-3.2-corda.jar:?] at net.corda.core.flows.DataVendingFlow.call(SendTransactionFlow.kt:48) ~[corda-core-3.2-corda.jar:?] at net.corda.core.flows.DataVendingFlow.call(SendTransactionFlow.kt:31) ~[corda-core-3.2-corda.jar:?] at net.corda.core.flows.FlowLogic.subFlow(FlowLogic.kt:290) ~[corda-core-3.2-corda.jar:?] at net.corda.core.flows.CollectSignatureFlow.call(CollectSignaturesFlow.kt:142) ~[corda-core-3.2-corda.jar:?] at net.corda.core.flows.CollectSignatureFlow.call(CollectSignaturesFlow.kt:135) ~[corda-core-3.2-corda.jar:?] at net.corda.core.flows.FlowLogic.subFlow(FlowLogic.kt:290) ~[corda-core-3.2-corda.jar:?] at net.corda.core.flows.CollectSignaturesFlow.call(CollectSignaturesFlow.kt:114) ~[corda-core-3.2-corda.jar:?] at net.corda.core.flows.CollectSignaturesFlow.call(CollectSignaturesFlow.kt:64) ~[corda-core-3.2-corda.jar:?] at net.corda.core.flows.FlowLogic.subFlow(FlowLogic.kt:290) ~[corda-core-3.2-corda.jar:?] at com.example.flow.ExampleFlowMatching$CollectSignaturesInitiatingFlow.call(ExampleFlowMatching.kt:280) ~[classes/:?] at com.example.flow.ExampleFlowMatching$CollectSignaturesInitiatingFlow.call(ExampleFlowMatching.kt:277) ~[classes/:?] at net.corda.core.flows.FlowLogic.subFlow(FlowLogic.kt:290) ~[corda-core-3.2-corda.jar:?] at com.example.flow.ExampleFlowMatching$ExampleFlowMatchingInitiator.call(ExampleFlowMatching.kt:170) ~[classes/:?] at com.example.flow.ExampleFlowMatching$ExampleFlowMatchingInitiator.call(ExampleFlowMatching.kt:45) ~[classes/:?] at net.corda.node.services.statemachine.FlowStateMachineImpl.run(FlowStateMachineImpl.kt:96) [corda-node-3.2-corda.jar:?] at net.corda.node.services.statemachine.FlowStateMachineImpl.run(FlowStateMachineImpl.kt:44) [corda-node-3.2-corda.jar:?] at co.paralleluniverse.fibers.Fiber.run1(Fiber.java:1092) [quasar-core-0.7.9-jdk8.jar:0.7.9] at co.paralleluniverse.fibers.Fiber.exec(Fiber.java:788) [quasar-core-0.7.9-jdk8.jar:0.7.9] at co.paralleluniverse.fibers.RunnableFiberTask.doExec(RunnableFiberTask.java:100) [quasar-core-0.7.9-jdk8.jar:0.7.9] at co.paralleluniverse.fibers.RunnableFiberTask.run(RunnableFiberTask.java:91) [quasar-core-0.7.9-jdk8.jar:0.7.9] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_191] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_191] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [?:1.8.0_191] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [?:1.8.0_191] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_191] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_191] at net.corda.node.utilities.AffinityExecutor$ServiceAffinityExecutor$1$thread$1.run(AffinityExecutor.kt:62) [corda-node-3.2-corda.jar:?] [WARN ] 16:03:05,491 [Node thread-1] (StateMachineManagerImpl.kt:79) flow.[55214e22-74aa-4f1b-a94d-6353d5bbf35d].uncaughtException - Caught exception from flow {} java.lang.IllegalStateException: Was expecting to find transaction set on current strand: Fiber@10000009:[55214e22-74aa-4f1b-a94d-6353d5bbf35d][task: co.paralleluniverse.fibers.RunnableFiberTask@4ca7589a(Fiber@10000009), target: null, scheduler: net.corda.node.services.statemachine.StateMachineManagerImpl$FiberScheduler@599eed84] at net.corda.nodeapi.internal.persistence.DatabaseTransactionKt.getContextTransaction(DatabaseTransaction.kt:14) ~[corda-node-api-3.2-corda.jar:?] at net.corda.node.services.statemachine.FlowStateMachineImpl.rollbackTransaction$node(FlowStateMachineImpl.kt:151) ~[corda-node-3.2-corda.jar:?] at net.corda.node.services.statemachine.StateMachineManagerImpl$initFiber$3.invoke(StateMachineManagerImpl.kt:460) ~[corda-node-3.2-corda.jar:?] at net.corda.node.services.statemachine.StateMachineManagerImpl$initFiber$3.invoke(StateMachineManagerImpl.kt:63) ~[corda-node-3.2-corda.jar:?] at net.corda.node.services.statemachine.FlowStateMachineImpl.processException(FlowStateMachineImpl.kt:131) ~[corda-node-3.2-corda.jar:?] at net.corda.node.services.statemachine.FlowStateMachineImpl.run(FlowStateMachineImpl.kt:112) ~[corda-node-3.2-corda.jar:?] at net.corda.node.services.statemachine.FlowStateMachineImpl.run(FlowStateMachineImpl.kt:44) ~[corda-node-3.2-corda.jar:?] at co.paralleluniverse.fibers.Fiber.run1(Fiber.java:1092) [quasar-core-0.7.9-jdk8.jar:0.7.9] at co.paralleluniverse.fibers.Fiber.exec(Fiber.java:788) [quasar-core-0.7.9-jdk8.jar:0.7.9] at co.paralleluniverse.fibers.RunnableFiberTask.doExec(RunnableFiberTask.java:100) [quasar-core-0.7.9-jdk8.jar:0.7.9] at co.paralleluniverse.fibers.RunnableFiberTask.run(RunnableFiberTask.java:91) [quasar-core-0.7.9-jdk8.jar:0.7.9] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_191] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_191] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [?:1.8.0_191] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [?:1.8.0_191] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_191] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_191] at net.corda.node.utilities.AffinityExecutor$ServiceAffinityExecutor$1$thread$1.run(AffinityExecutor.kt:62) [corda-node-3.2-corda.jar:?]
