当我尝试通过SqlPackage.exe部署DACPAC时，遇到以下错误：
An unexpected failure occurred: Object reference not set to an instance of an object..
Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Data.Tools.Schema.Sql.SchemaModel.ReverseEngineerPopulators.Sql90TableBaseColumnPopulator`1.InsertElementIntoParent(SqlColumn element, TElement parent, ReverseEngineerOption option)
at Microsoft.Data.Tools.Schema.Sql.SchemaModel.ReverseEngineerPopulators.ChildModelElementPopulator`2.CreateChildElement(TParent parent, EventArgs e, ReverseEngineerOption option)
at Microsoft.Data.Tools.Schema.Sql.SchemaModel.ReverseEngineerPopulators.ChildModelElementPopulator`2.PopulateAllChildrenFromCache(IDictionary`2 cache, SqlReverseEngineerRequest request, OrdinalSqlDataReader reader, ReverseEngineerOption option)
at Microsoft.Data.Tools.Schema.Sql.SchemaModel.ReverseEngineerPopulators.TopLevelElementPopulator`1.Populate(SqlReverseEngineerRequest request, OrdinalSqlDataReader reader, ReverseEngineerOption option)
at Microsoft.Data.Tools.Schema.Sql.SchemaModel.SqlReverseEngineerImpl.ExecutePopulators(ReliableSqlConnection conn, IList`1 populators, Int32 totalPopulatorsCount, Int32 startIndex, Boolean progressAlreadyUpdated, ReverseEngineerOption option, SqlReverseEngineerRequest request)
at Microsoft.Data.Tools.Schema.Sql.SchemaModel.SqlReverseEngineerImpl.ExecutePopulatorsInPass(SqlReverseEngineerConnectionContext context, ReverseEngineerOption option, SqlReverseEngineerRequest request, Int32 totalCount, Tuple`2[] populatorsArray)
at Microsoft.Data.Tools.Schema.Sql.SchemaModel.SqlReverseEngineerImpl.PopulateBatch(SqlReverseEngineerConnectionContext context, SqlSchemaModel model, ReverseEngineerOption option, ErrorManager errorManager, SqlReverseEngineerRequest request, SqlImportScope importScope)
at Microsoft.Data.Tools.Schema.Sql.SchemaModel.SqlReverseEngineer.PopulateAll(SqlReverseEngineerConnectionContext context, ReverseEngineerOption option, ErrorManager errorManager, Boolean filterManagementScopedElements, SqlImportScope importScope, Boolean optimizeForQuery, ModelStorageType modelType)
at Microsoft.Data.Tools.Schema.Sql.Deployment.SqlDeploymentEndpointServer.ImportDatabase(SqlReverseEngineerConstructor constructor, DeploymentEngineContext context, ErrorManager errorManager)
at Microsoft.Data.Tools.Schema.Sql.Deployment.SqlDeploymentEndpointServer.OnLoad(ErrorManager errors, DeploymentEngineContext context)
at Microsoft.Data.Tools.Schema.Sql.Deployment.SqlDeployment.PrepareModels()
at Microsoft.Data.Tools.Schema.Sql.Deployment.SqlDeployment.InitializePlanGeneratator()
at Microsoft.SqlServer.Dac.DacServices.<>c__DisplayClass21.<CreateDeploymentArtifactGenerationOperation>b__1f(Object operation, CancellationToken token)
at Microsoft.SqlServer.Dac.Operation.Microsoft.SqlServer.Dac.IOperation.Run(OperationContext context)
at Microsoft.SqlServer.Dac.ReportMessageOperation.Microsoft.SqlServer.Dac.IOperation.Run(OperationContext context)
at Microsoft.SqlServer.Dac.OperationExtension.Execute(IOperation operation, DacLoggingContext loggingContext, CancellationToken cancellationToken)
at Microsoft.SqlServer.Dac.DacServices.GenerateDeployScript(DacPackage package, String targetDatabaseName, DacDeployOptions options, Nullable`1 cancellationToken)
at Microsoft.Data.Tools.Schema.CommandLineTool.DacServiceUtil.<>c__DisplayClasse.<DoDeployAction>b__4(DacServices service)
at Microsoft.Data.Tools.Schema.CommandLineTool.DacServiceUtil.ExecuteDeployOperation(String connectionString, String filePath, MessageWrapper messageWrapper, Boolean sourceIsPackage, Boolean targetIsPackage, Func`1 generateScriptFromPackage, Func`2 generateScriptFromDatabase)
at Microsoft.Data.Tools.Schema.CommandLineTool.DacServiceUtil.DoDeployAction(DeployArguments parsedArgs, Action`1 writeError, Action`2 writeMessage, Action`1 writeWarning)
at Microsoft.Data.Tools.Schema.CommandLineTool.Program.DoDeployActions(CommandLineArguments parsedArgs)
at Microsoft.Data.Tools.Schema.CommandLineTool.Program.Run(String[] args)
at Microsoft.Data.Tools.Schema.CommandLineTool.Program.Main(String[] args)
下面是我运行的命令：
SET vardeploy2=/Action:Script
set varBlockOnDriftParameter=/p:BlockWhenDriftDetected=False
"SSDTBinaries\SqlPackage.exe" %vardeploy2% %varBlockOnDriftParameter% /SourceFile:"dacpacs\DBName.dacpac" /Profile:"Profiles\%1.DBName.Publish.xml" >> Log.txt 2>>&1
我部署到SQL Server 2008 R2。SqlPackage.exe版本是11.0.2820.0。
该问题是间歇性的，这表明它与正在部署的 DACPAC 或目标数据库的架构无关。我最好的猜测是数据库状态的某些原因导致了问题。
尽管如此，在故障发生时，我仍然无法识别出任何异常情况。
在本地重新创建问题时，使用模式锁定会导致不同的错误消息。
有谁知道解决方案？