Function Compute:Error handling

Errors thrown by a function

If an error occurs during function executions, Function Compute captures the error and returns the error information.

Sample code:

using System;
using System.IO;
using System.Threading.Tasks;
using Aliyun.Serverless.Core;
using Microsoft.Extensions.Logging;

namespace Example
{
    public class Hello
    {
        public async void StreamHandler(Stream input, IFcContext context)
        {
            throw new Exception("oops");
        }

        static void Main(string[] args){}
    }
}

{
    "errorMessage": "oops",
    "errorType": "System.Exception",
    "stackTrace": [...]
}

When an error occurs, the HTTP header in the response to the function invocation contains X-Fc-Error-Type UnhandledInvocationError. For information about the error types of Function Compute, see Basics.

Proactive exit of a function

If an error occurs when a function proactively exists during running, you cannot obtain the error information or stack information. This method is not recommended.

Sample code:

using System;
using System.IO;
using System.Threading.Tasks;
using Aliyun.Serverless.Core;
using Microsoft.Extensions.Logging;

namespace Example
{
    public class Hello
    {
        public async void StreamHandler(Stream input, IFcContext context)
        {
            System.Environment.Exit(1);
        }

        static void Main(string[] args){}
    }
}

{
    "errorMessage": "Process exited unexpectedly before completing request (duration: 45ms, maxMemoryUsage: 49MB)"
}