aws-lambda-python-alpha: panic: JsiiError: @jsii/kernel.Fault Module '@aws-cdk/aws-lambda-python-alpha' not found

[kaykhan]

Describe the bug

I want to deploy a python function using https://docs.aws.amazon.com/cdk/api/v2/docs/aws-lambda-python-alpha-readme.html

However i get the error panic: JsiiError: @jsii/kernel.Fault Module '@aws-cdk/aws-lambda-python-alpha' not found
when i run any cdk command.

I installed using.

go get -u github.com/aws/aws-cdk-go/awscdklambdapythonalpha/v2

go: downloading github.com/aws/jsii-runtime-go v1.105.0
go: downloading github.com/aws/constructs-go v0.0.0-20241014125741-52e7ddc71aae
go: downloading github.com/aws/constructs-go/constructs v0.0.0-20210203051210-8754df3d2bfd
go: downloading github.com/cdklabs/cloud-assembly-schema-go v0.0.0-20241216002747-b2fc8a3ba4cb
go: downloading github.com/cdklabs/awscdk-asset-kubectl-go v0.0.0-20241010141422-eef99ab750e0
go: downloading github.com/cdklabs/awscdk-asset-awscli-go/awscliv1 v0.0.13
go: downloading github.com/cdklabs/awscdk-asset-kubectl-go/kubectlv20 v0.0.21
go: downloading github.com/cdklabs/awscdk-asset-awscli-go v0.0.0-20241209155413-94cd21215ea0
go: downloading github.com/cdklabs/awscdk-asset-awscli-go/awscliv1/v2 v2.2.214
go: downloading github.com/cdklabs/awscdk-asset-node-proxy-agent-go v0.0.0-20240903093635-1dfb93ea640b
go: downloading github.com/Masterminds/semver v1.5.0
go: downloading github.com/Masterminds/semver/v3 v3.3.1
go: downloading github.com/fatih/color v1.18.0
go: downloading golang.org/x/tools v0.27.0
go: downloading golang.org/x/mod v0.22.0
go: upgraded github.com/Masterminds/semver/v3 v3.3.0 => v3.3.1
go: upgraded github.com/aws/jsii-runtime-go v1.104.0 => v1.105.0
go: upgraded github.com/cdklabs/awscdk-asset-awscli-go/awscliv1/v2 v2.2.208 => v2.2.214
go: upgraded github.com/fatih/color v1.17.0 => v1.18.0
go: upgraded golang.org/x/mod v0.21.0 => v0.22.0
go: upgraded golang.org/x/tools v0.26.0 => v0.27.0

	DocumentXBRLParserStack(app, fmt.Sprintf("market-data-%s-%s-xbrl-parser", providerName, pipelineName), &CHStreamFilingDocumentLib.DocumentXBRLParserStackProps{
		Environment: environment,
		StackProps: awscdk.StackProps{
			StackName: jsii.String(fmt.Sprintf("market-data-%s-%s-xbrl-parser", providerName, pipelineName)),
			Env:       env(),
		},
		Dependency: CHStreamFilingDocumentLib.DocumentXBRLParserStackDependencyProps{
			PipelineName: pipelineName,
			ProviderName: providerName,
		},
	})
	
	
...
func DocumentXBRLParserStack(scope constructs.Construct, id string, props *DocumentXBRLParserStackProps) awscdk.Stack {
	var sprops awscdk.StackProps
	if props != nil {
		sprops = props.StackProps
	}
	stack := awscdk.NewStack(scope, &id, &sprops)
	name := *stack.StackName()
	pipelineName := props.Dependency.PipelineName
	providerName := props.Dependency.ProviderName
	serviceName := pipelineName + "xbrl-parser"

	awscdklambdapythonalpha.NewPythonFunction(stack, jsii.String(fmt.Sprintf("%s-lfn", name)), &awscdklambdapythonalpha.PythonFunctionProps{
		FunctionName: jsii.String(name),
		Runtime:      awslambda.Runtime_PYTHON_3_8(),
		Entry:        jsii.String(fmt.Sprintf("src/%s/stream/filings/document/xbrl/parser", providerName)),
		Environment: &map[string]*string{
			"ENV":           &props.Environment,
			"STACK_NAME":    &name,
			"SERVICE_NAME":  &serviceName,
			"PIPELINE_NAME": &pipelineName,
			"PROVIDER_NAME": &providerName,
		},
		Timeout:                      awscdk.Duration_Seconds(jsii.Number(60)),
		ReservedConcurrentExecutions: jsii.Number(2),
	})

	return stack
}

Regression Issue

• Select this option if this issue appears to be a regression.

Expected Behavior

Expect to be able to use awscdklambdapythonalpha construct to deploy a python function in my go code.

Current Behavior

cdk ls --app "go run bin/ch/main.go"

panic: JsiiError: @jsii/kernel.Fault Module '@aws-cdk/aws-lambda-python-alpha' not found

goroutine 1 [running]:
github.com/aws/jsii-runtime-go/internal/kernel.(*Client).CastPtrToRef(0xc000132060, {0x10147a0?, 0x617a180?, 0x10?})
        /home/kay/go/1.22.4/pkg/mod/github.com/aws/[email protected]/internal/kernel/conversions.go:207 +0x6e6
github.com/aws/jsii-runtime-go/internal/kernel.(*Client).CastPtrToRef(0xc000132060, {0xfff720?, 0xc00052a388?, 0x4?})
        /home/kay/go/1.22.4/pkg/mod/github.com/aws/[email protected]/internal/kernel/conversions.go:203 +0x59b
github.com/aws/jsii-runtime-go/internal/kernel.(*Client).CastPtrToRef(0xc000132060, {0xf246a0?, 0xc0006ca9d0?, 0x4?})
        /home/kay/go/1.22.4/pkg/mod/github.com/aws/[email protected]/internal/kernel/conversions.go:189 +0x8e7
github.com/aws/jsii-runtime-go/internal/kernel.(*Client).CastPtrToRef(0xc000132060, {0xf246e0?, 0xc0006ca788?, 0x4ab405?})
        /home/kay/go/1.22.4/pkg/mod/github.com/aws/[email protected]/internal/kernel/conversions.go:189 +0x8e7
github.com/aws/jsii-runtime-go/runtime.convertArguments({0xc0006bbaa8, 0x3, 0x10195a0?})
        /home/kay/go/1.22.4/pkg/mod/github.com/aws/[email protected]/runtime/runtime.go:381 +0xef
github.com/aws/jsii-runtime-go/runtime.Create({0x122db8d, 0x27}, {0xc0006bbaa8, 0x3, 0x3}, {0x11cf800, 0xc000549a00})
        /home/kay/go/1.22.4/pkg/mod/github.com/aws/[email protected]/runtime/runtime.go:196 +0xb50
github.com/aws/aws-cdk-go/awscdklambdagoalpha/v2.NewGoFunction({0x7f4ca1c38a20, 0xc000527dd0}, 0xc000549770, 0xc0006ca788)
        /home/kay/go/1.22.4/pkg/mod/github.com/aws/aws-cdk-go/awscdklambdagoalpha/[email protected]/GoFunction.go:511 +0x112
market-data/lib/ch/filings.FilingsStreamProcessorStack({0x7f4ca1c38938, 0xc0005124d0}, {0xc0004f6de0, 0x27}, 0xc0000e2c60)
        /home/kay/kay/market-data/lib/ch/filing_stream_processor.go:58 +0x9bd
main.main()
        /home/kay/kay/market-data/bin/ch/main.go:32 +0x539
exit status 2
Subprocess exited with error 1

Reproduction Steps

go get -u github.com/aws/aws-cdk-go/awscdklambdapythonalpha/v2

Possible Solution

No response

Additional Information/Context

CDK CLI Version

2.173.1 (build 4eac959)

Node.js Version

20.14

OS

Ubuntu 24

Language

Go 1.23.3

SDK version used

jsii-runtime-go v1.105.0

Environment details (OS name and version, etc.)

Ubuntu

[kaykhan]

Minimal reproducable example: https://github.com/kaykhan/aws-lambda-python-alpha-kernal-fault-jsii

[kaizencc]

Thanks for linking the other issue. Closing this one as duplicate for #4737

[github-actions]

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