CfnAssociation_ throws 'Collection was modified'

[kuhnboy]

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• I'm submitting a ...

  • 🪲 bug report
  • 🚀 feature request
  • 📚 construct library gap
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• What is the current behavior?
  If the current behavior is a 🪲bug🪲: Please provide the steps to reproduce

Creating CfnAssociation throws on synth:

Unhandled Exception: Amazon.JSII.Runtime.JsiiException: Amazon.JSII.Runtime.JsiiException: Resolution error: System.InvalidOperationException: Collection was modified; enumeration operation may not execute.

new CfnAssociation_(this, "patchScan", new CfnAssociationProps
{
AssociationName = $"abc-patch-scan",
Targets = new[]
{
new Amazon.CDK.AWS.SSM.CfnAssociation.TargetProperty
{
Key = "tag:Patch Group",
Values = new[]
{
$"abc-az1",
$"abc-az2",
$"abc-az3"
}
}
},
DocumentVersion = "$LATEST",
Name = "AWS-RunPatchBaseline",
OutputLocation = new Amazon.CDK.AWS.SSM.CfnAssociation.InstanceAssociationOutputLocationProperty
{
S3Location = new Amazon.CDK.AWS.SSM.CfnAssociation.S3OutputLocationProperty
{ OutputS3BucketName = $"ssm-bucket", OutputS3KeyPrefix = $"prefix/patch-scan" }
},
Parameters = new Dictionary<string, Amazon.CDK.AWS.SSM.CfnAssociation.ParameterValuesProperty>
{
{
"Operation", new Amazon.CDK.AWS.SSM.CfnAssociation.ParameterValuesProperty
{
ParameterValues = new[] { "Scan" }
}
}
}
});

• What is the expected behavior (or behavior of feature suggested)?

Synth creates cdk.out. Trying to test: #3092

• What is the motivation / use case for changing the behavior or adding this feature?

• Please tell us about your environment:

  • CDK CLI Version: 1.0.0
  • Module Version: 1.0.0-devpreview
  • OS: Windows 10
  • Language: C#

• Other information (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. associated pull-request, stackoverflow, gitter, etc)

Unhandled Exception: Amazon.JSII.Runtime.JsiiException: Amazon.JSII.Runtime.JsiiException: Resolution error: System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
at System.Collections.Generic.Dictionary2.KeyCollection.Enumerator.MoveNext() at Amazon.JSII.Runtime.CallbackExtensions.FromKernel(Object obj, IReferenceMap referenceMap) at Amazon.JSII.Runtime.CallbackExtensions.FromKernel(Object obj, IReferenceMap referenceMap) at System.Linq.Enumerable.SelectArrayIterator2.ToArray()
at System.Linq.Enumerable.ToArray[TSource](IEnumerable1 source) at Amazon.JSII.Runtime.CallbackExtensions.InvokeMethod(InvokeRequest request, IReferenceMap referenceMap) at Amazon.JSII.Runtime.CallbackExtensions.InvokeCallback(Callback callback, IReferenceMap referenceMap, IFrameworkToJsiiConverter converter, String& error). Object creation stack: at new Intrinsic (C:\Users\rkuhn\AppData\Local\Temp\jsii-kernel-Mqbj2n\node_modules\@aws-cdk\core\lib\private\intrinsic.js:20:44) at new PostResolveToken (C:\Users\rkuhn\AppData\Local\Temp\jsii-kernel-Mqbj2n\node_modules\@aws-cdk\core\lib\util.js:72:9) at CfnAssociation._toCloudFormation (C:\Users\rkuhn\AppData\Local\Temp\jsii-kernel-Mqbj2n\node_modules\@aws-cdk\core\lib\cfn-resource.js:167:39) at node.addReference.resolve_1.findTokens (C:\Users\rkuhn\AppData\Local\Temp\jsii-kernel-Mqbj2n\node_modules\@aws-cdk\core\lib\cfn-element.js:84:77) at Object.findTokens (C:\Users\rkuhn\AppData\Local\Temp\jsii-kernel-Mqbj2n\node_modules\@aws-cdk\core\lib\private\resolve.js:125:13) at CfnAssociation.prepare (C:\Users\rkuhn\AppData\Local\Temp\jsii-kernel-Mqbj2n\node_modules\@aws-cdk\core\lib\cfn-element.js:84:49) at _wrapSandboxCode (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6493:51) at Kernel._wrapSandboxCode (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:7126:20) at ret._ensureSync (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6493:25) at Kernel._ensureSync (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:7097:20) at Kernel.invoke (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6492:26) at KernelHost.processRequest (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6186:28) at completeCallback (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6159:25) at KernelHost.callbackHandler (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6140:16) at KernelHost.kernel.jsii_kernel_1.Kernel.cb [as callbackHandler] (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6124:59) at CfnAssociation.value (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6843:41) at Function.prepare (C:\Users\rkuhn\AppData\Local\Temp\jsii-kernel-Mqbj2n\node_modules\@aws-cdk\core\lib\construct.js:89:27) at Function.synth (C:\Users\rkuhn\AppData\Local\Temp\jsii-kernel-Mqbj2n\node_modules\@aws-cdk\core\lib\construct.js:52:14) at App.synth (C:\Users\rkuhn\AppData\Local\Temp\jsii-kernel-Mqbj2n\node_modules\@aws-cdk\core\lib\app.js:67:52) at _wrapSandboxCode (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6493:51) at Kernel._wrapSandboxCode (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:7126:20) at ret._ensureSync (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6493:25) at Kernel._ensureSync (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:7097:20) at Kernel.invoke (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6492:26) at KernelHost.processRequest (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6186:28) at KernelHost.run (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6132:14) at processRequest (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6132:45) at KernelHost.processRequest (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6228:16) at KernelHost.run (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6132:14) at processRequest (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6132:45) at KernelHost.processRequest (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6228:16) at KernelHost.run (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6132:14) at processRequest (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6132:45) at promise.then.val (C:\Users\rkuhn\AppData\Local\Temp\cxjwsqod.kzz\jsii-runtime.js:6213:21) at <anonymous> at Amazon.JSII.Runtime.Services.Client.TryDeserialize[TResponse](String responseJson) at Amazon.JSII.Runtime.Services.Client.ReceiveResponse[TResponse]() at Amazon.JSII.Runtime.Services.Client.TryDeserialize[TResponse](String responseJson) at Amazon.JSII.Runtime.Services.Client.ReceiveResponse[TResponse]() at Amazon.JSII.Runtime.Deputy.DeputyBase.<InvokeMethodCore>g__GetResult|18_0[T](<>c__DisplayClass18_01& )
at Amazon.JSII.Runtime.Deputy.DeputyBase.InvokeMethodCore[T](JsiiMethodAttribute methodAttribute, Object[] arguments, Func3 beginFunc, Func3 invokeFunc)
at Amazon.JSII.Runtime.Deputy.DeputyBase.InvokeInstanceMethod[T](Object[] arguments, String methodName)
at Amazon.CDK.CfnElement.Prepare()
at Amazon.JSII.Runtime.Services.Client.TryDeserialize[TResponse](String responseJson)
at Amazon.JSII.Runtime.Services.Client.ReceiveResponseTResponse
at Amazon.JSII.Runtime.Services.Client.TryDeserialize[TResponse](String responseJson)
at Amazon.JSII.Runtime.Services.Client.ReceiveResponseTResponse
at Amazon.JSII.Runtime.Deputy.DeputyBase.g__GetResult|18_0[T](<>c__DisplayClass18_01& ) at Amazon.JSII.Runtime.Deputy.DeputyBase.InvokeMethodCore[T](JsiiMethodAttribute methodAttribute, Object[] arguments, Func3 beginFunc, Func`3 invokeFunc)
at Amazon.JSII.Runtime.Deputy.DeputyBase.InvokeInstanceMethod[T](Object[] arguments, String methodName)
at HelloCdk.Program.Main(String[] args) in C:\source\foo\src\HelloCdk\Program.cs:line 19
Subprocess exited with error 3762504530

[kuhnboy]

Possibly related to: https://github.com/aws/aws-cdk/issues/3280

[RomainMuller]

This should have been fixed by now. Please re-open if still an issue.