RunspacePool PowerShell没有响应

Question

我创建了一个使用RunspacePool的WindowsService，并根据请求执行PowerShell脚本和相关的Runspaces。这很好用，但是当服务没有得到大约4.5小时的任何请求时，脚本就不再运行了。 PowerShell显示它有错误，但错误流是空的。甚至在3小时后建立一个新的RunspacePool也行不通。我不知道问题可能是什么。任何帮助都将受到高度赞赏。

这是创建runspacepool的代码：

Uri uri = credentials.ConnectionUri;
SecureString securePassword = credentials.Password;

PSCredential creds = new PSCredential(credentials.UserName, securePassword);

InitialSessionState iss = InitialSessionState.CreateDefault();

RunspacePool runspacePool = RunspaceFactory.CreateRunspacePool(iss);
runspacePool.ThreadOptions = PSThreadOptions.UseNewThread;

PowerShell powershell = PowerShell.Create();
PSCommand command = new PSCommand();
command.AddCommand(string.Format("New-PSSession"));
command.AddParameter("ConfigurationName", "Microsoft.Exchange");
command.AddParameter("ConnectionUri", uri);
command.AddParameter("Credential", creds);
command.AddParameter("Authentication", "Basic");
command.AddParameter("AllowRedirection");

PSSessionOption sessionOption = new PSSessionOption();
sessionOption.SkipCACheck = true;
sessionOption.SkipCNCheck = true;
sessionOption.SkipRevocationCheck = true;
command.AddParameter("SessionOption", sessionOption);

powershell.Commands = command;

runspacePool.Open();
powershell.RunspacePool = runspacePool;
Collection<PSSession> result = powershell.Invoke<PSSession>();