WF4 出现间歇性 InstanceOwnerException

Question

我正在 worflow Foundation 4 中运行工作流，并使用 SQL Durable 实例来实现持久性。

有时，我在恢复工作流程时遇到 System.Runtime.DurableInstancing.InstanceOwnerException。

System.Runtime.DurableInstancing.InstanceOwnerException occurred

  Message="The execution of an InstancePersistenceCommand was interrupted because the instance owner registration for owner ID 'd2db07fd-f31d-458c-be53-de163d5db8d4' has become invalid. This error indicates that the in-memory copy of all instances locked by this owner have become stale and should be discarded, along with the InstanceHandles. Typically, this error is best handled by restarting the host."

  Source=System.Runtime.DurableInstancing

  StackTrace:
       à System.Runtime.AsyncResult.End[TAsyncResult](IAsyncResult result)
       à System.Runtime.DurableInstancing.InstancePersistenceContext.ExecuteAsyncResult.End(IAsyncResult result)
       à System.Runtime.DurableInstancing.InstancePersistenceContext.OuterExecute(InstanceHandle initialInstanceHandle, InstancePersistenceCommand command, Transaction transaction, TimeSpan timeout)
       à System.Runtime.DurableInstancing.InstanceStore.Execute(InstanceHandle handle, InstancePersistenceCommand command, TimeSpan timeout)
       à System.Activities.WorkflowApplication.PersistenceManager.Load(TimeSpan timeout)
       à System.Activities.WorkflowApplication.LoadCore(TimeSpan timeout, Boolean loadAny)
       à System.Activities.WorkflowApplication.Load(Guid instanceId, TimeSpan timeout)
       à System.Activities.WorkflowApplication.Load(Guid instanceId)

有没有办法避免这种异常？

Answer 1

这通常是由于先前的运行未正常完成并在原始锁定到期之前重新启动的结果。这是由于编辑/调试/编辑周期还是在生产环境中发生的？

您可以使用 HostLockRenewalPeriod 设置来调整锁定期限。请记住，将其设置为真正的低值通常不是一个好主意。