[BUG] Fail to resume activity when there have Int32 variable

[TimNguyenVN]

Hi @sfmskywalker, I am encountering an issue with workflows when using int variables stored in the workflow instance. Can you take a look at here? Thank you so much!

Steps to Reproduce

• Add a variable type Int32 with Storage Workflow Instance
• Add activity Set Variable to set it to 0, 1, 2… with default input type (not C# or JavaScript)
• Add Delay activity and set delay time to 10s
• Execute Workflow

Result

Workflow stuck at Suspend state and the Delay activity also got stuck but did not throw any exception

Expect behavior

Workflow resume and continue

Exception:

System.Text.Json.JsonException: The JSON value could not be converted to System.Int32. Path: $ | LineNumber: 0 | BytePositionInLine: 5.
       ---> System.InvalidOperationException: Cannot get the value of a token type 'String' as a number.
         at System.Text.Json.ThrowHelper.ThrowInvalidOperationException_ExpectedNumber(JsonTokenType tokenType)
         at System.Text.Json.Utf8JsonReader.TryGetInt32(Int32& value)
         at System.Text.Json.Utf8JsonReader.GetInt32()
         at System.Text.Json.Serialization.Converters.Int32Converter.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options)
         at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value, Boolean& isPopulatedValue)
         at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
         --- End of inner exception stack trace ---
         at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& state, Utf8JsonReader& reader, Exception ex)
         at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
         at System.Text.Json.Serialization.Metadata.JsonTypeInfo`1.Deserialize(Utf8JsonReader& reader, ReadStack& state)
         at System.Text.Json.Serialization.Metadata.JsonTypeInfo`1.DeserializeAsObject(Utf8JsonReader& reader, ReadStack& state)
         at System.Text.Json.JsonSerializer.ReadFromSpanAsObject(ReadOnlySpan`1 utf8Json, JsonTypeInfo jsonTypeInfo, Nullable`1 actualByteCount)
         at System.Text.Json.JsonSerializer.ReadFromNodeAsObject(JsonNode node, JsonTypeInfo jsonTypeInfo)
         at System.Text.Json.JsonSerializer.Deserialize(JsonNode node, Type returnType, JsonSerializerOptions options)
         at Elsa.Expressions.Helpers.ObjectConverter.ConvertTo(Object value, Type targetType, ObjectConverterOptions converterOptions)
         at Elsa.Extensions.VariableExtensions.ParseValue(Variable variable, Object value)
         at Elsa.Workflows.Services.VariablePersistenceManager.LoadVariablesAsync(WorkflowExecutionContext workflowExecutionContext)
         at Elsa.Workflows.Runtime.Middleware.Workflows.PersistentVariablesMiddleware.InvokeAsync(WorkflowExecutionContext context)
         at Elsa.Workflows.Runtime.Middleware.Workflows.PersistWorkflowExecutionLogMiddleware.InvokeAsync(WorkflowExecutionContext context)
         at Elsa.Workflows.Runtime.Middleware.Workflows.PersistActivityExecutionLogMiddleware.InvokeAsync(WorkflowExecutionContext context)
         at Elsa.Workflows.Runtime.Middleware.Workflows.PersistBookmarkMiddleware.InvokeAsync(WorkflowExecutionContext context)
         at Elsa.Workflows.Runtime.Middleware.Workflows.ScheduleBackgroundActivitiesMiddleware.InvokeAsync(WorkflowExecutionContext context)
         at Elsa.Workflows.Middleware.Workflows.EngineExceptionHandlingMiddleware.InvokeAsync(WorkflowExecutionContext context)

Note:

This issue does not happen with storage Workflow or memory and C#, JavaScript also return int. So there maybe a problem in the process deserialize data in workflow instance
Need to explore more case with set variable because it do not throw exception at the set step.

Environment

• Elsa Package Version: 3.2.1
• Operating System: Windows 10

Export json

workflow-1.json