Hi,

Data flow nodes are not coming up and the status is "JOINING_FAILED" with the below exception in the log file:

ERROR   - Cannot start service [DataFlow.Default]. Will retry in 180 seconds. Remaining attempts: 0 java.lang.IllegalArgumentException: No enum constant com.pega.dsm.dnode.impl.dataflow.util.migration.DataFlowRunMigrationTool.Version.V8_6     at java.lang.Enum.valueOf(Enum.java:238) ~[?:1.8.0_342]     at com.pega.dsm.dnode.impl.dataflow.util.migration.DataFlowRunMigrationTool$Version.valueOf(DataFlowRunMigrationTool.java:131) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.util.migration.DataFlowRunMigrationTool$VersionEntry.extractVersion(DataFlowRunMigrationTool.java:162) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.util.migration.DataFlowRunMigrationTool$VersionEntry.from(DataFlowRunMigrationTool.java:151) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.util.migration.DataFlowRunMigrationTool$VersionEntry.access$000(DataFlowRunMigrationTool.java:137) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.util.migration.DataFlowRunMigrationTool.tryAssign(DataFlowRunMigrationTool.java:59) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.service.DataFlowServiceStartOperation.lambda$startServer$1(DataFlowServiceStartOperation.java:70) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.stream.DataObservableImpl$SafeDataSubscriber.subscribe(DataObservableImpl.java:353) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.stream.DataObservableImpl.subscribe(DataObservableImpl.java:55) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.stream.DataObservableImpl.await(DataObservableImpl.java:117) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.stream.DataObservableImpl.await(DataObservableImpl.java:106) ~[d-node.jar:?]     at com.pega.dsm.dnode.api.prpc.service.operation.StartOperation.doActualServerStart(StartOperation.java:161) ~[d-node.jar:?]     at com.pega.dsm.dnode.api.prpc.service.operation.StartOperation.performStartupWithRetries(StartOperation.java:136) ~[d-node.jar:?]     at com.pega.dsm.dnode.api.prpc.service.operation.StartOperation.initializeServerMode(StartOperation.java:116) ~[d-node.jar:?]     at com.pega.dsm.dnode.api.prpc.service.operation.StartOperation.lambda$bootstrap$0(StartOperation.java:84) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.stream.DataObservableImpl$SafeDataSubscriber.subscribe(DataObservableImpl.java:353) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.stream.DataObservableImpl.subscribe(DataObservableImpl.java:55) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.stream.DataObservableImpl.await(DataObservableImpl.java:117) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.stream.DataObservableImpl.await(DataObservableImpl.java:106) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.service.DataFlowServiceInstanceStartOperation.initializeServerMode(DataFlowServiceInstanceStartOperation.java:45) ~[d-node.jar:?]     at com.pega.dsm.dnode.api.prpc.service.operation.StartOperation.lambda$bootstrap$0(StartOperation.java:84) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.stream.DataObservableImpl$SafeDataSubscriber.subscribe(DataObservableImpl.java:353) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.stream.DataObservableImpl.subscribe(DataObservableImpl.java:55) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.stream.DataObservableImpl.await(DataObservableImpl.java:117) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.stream.DataObservableImpl.toList(DataObservableImpl.java:96) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.prpc.service.RemoteServiceOperation$ExecuteOperationMessage.call(RemoteServiceOperation.java:131) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.prpc.service.RemoteServiceOperation$ExecuteOperationMessage.call(RemoteServiceOperation.java:90) ~[d-node.jar:?]     at com.pega.dsm.dnode.api.prpc.service.CallableMessageWithContext$1.run(CallableMessageWithContext.java:48) ~[d-node.jar:?]     at com.pega.dsm.dnode.api.prpc.service.CallableMessageWithContext$1.run(CallableMessageWithContext.java:45) ~[d-node.jar:?]     at com.pega.dsm.dnode.util.PrpcRunnable.execute(PrpcRunnable.java:67) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.prpc.service.ServiceHelper$2.run(ServiceHelper.java:291) ~[d-node.jar:?]     at com.pega.pegarules.session.internal.PRSessionProviderImpl.performTargetActionWithLock(PRSessionProviderImpl.java:1397) ~[prprivate-session.jar:?]     at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:1140) ~[prprivate-session.jar:?]     at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:947) ~[prprivate-session.jar:?]     at com.pega.dsm.dnode.impl.prpc.service.ServiceHelper.executeInPrpcContextInternal(ServiceHelper.java:284) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.prpc.service.ServiceHelper.executeInPrpcContext(ServiceHelper.java:146) ~[d-node.jar:?]     at com.pega.dsm.dnode.api.prpc.service.CallableMessageWithContext.call(CallableMessageWithContext.java:45) ~[d-node.jar:?]     at com.pega.dsm.dnode.api.prpc.service.AbstractDsmService.handleMessageInternal(AbstractDsmService.java:176) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.prpc.service.PostMessageJob$PostMessageJobData.handleMessage(PostMessageJob.java:87) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.prpc.service.PostMessageJob.execute(PostMessageJob.java:36) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.prpc.service.PostMessageJob.execute(PostMessageJob.java:31) ~[d-node.jar:?]     at com.pega.pegarules.cluster.external.PRPCTask.call(PRPCTask.java:132) ~[prenginext.jar:?]     at com.pega.pegarules.cluster.external.PRPCTask.call(PRPCTask.java:59) ~[prenginext.jar:?]     at com.pega.platform.remoteexecution.internal.RequestProcessor.run(RequestProcessor.java:56) ~[remoteexecution.jar:?]     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[?:1.8.0_342]     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[?:1.8.0_342]     at java.lang.Thread.run(Thread.java:750) [?:1.8.0_342]