Azure Key Vault
An Azure service that is used to manage and protect cryptographic keys and other secrets used by cloud apps and services.
1,442 questions
Config builder fails on production but works on dev
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(243.2, 68%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJ%3C/text%3E%3C/svg%3E)
James
0
Reputation points
Hello I have an angular site and I am trying to store my connection strings in the azure key vault and retrieve them in my web.config file. With my current set up it works locally. It also works when I deploy to our dev web app. When I deploy to the production web app it does not work and I get a yellow screen with the following output. I think it is an azure issue, but I am unsure how to fix it.
[AmbiguousMatchException: Multiple custom attributes of the same type found.]
System.Attribute.GetCustomAttribute(Assembly element, Type attributeType, Boolean inherit) +109
System.Runtime.InteropServices.RuntimeInformation.get_FrameworkDescription() +87
Azure.Core.TelemetryDetails.GenerateUserAgentString(Assembly clientAssembly, String applicationId) +166
Azure.Core.TelemetryDetails..ctor(Assembly assembly, String applicationId) +66
Azure.Core.Pipeline.HttpPipelineBuilder.CreateTelemetryPolicy(ClientOptions options) +56
Azure.Core.Pipeline.HttpPipelineBuilder.BuildInternal(ClientOptions options, HttpPipelinePolicy[] perCallPolicies, HttpPipelinePolicy[] perRetryPolicies, HttpPipelineTransportOptions defaultTransportOptions, ResponseClassifier responseClassifier) +285
Azure.Identity.CredentialPipeline..ctor(TokenCredentialOptions options) +125
Azure.Identity.<>c.<.cctor>b__19_0() +79
System.Lazy`1.CreateValue() +413
System.Lazy`1.LazyInitValue() +372
System.Lazy`1.get_Value() +133
Azure.Identity.CredentialPipeline.GetInstance(TokenCredentialOptions options) +51
Azure.Identity.DefaultAzureCredential..ctor(DefaultAzureCredentialOptions options) +37
Microsoft.Configuration.ConfigurationBuilders.AzureKeyVaultConfigBuilder.LazyInitialize(String name, NameValueCollection config) +523
Microsoft.Configuration.ConfigurationBuilders.KeyValueConfigBuilder.EnsureInitialized() +92
Microsoft.Configuration.ConfigurationBuilders.KeyValueConfigBuilder.GetValueInternal(String key) +77
[Exception: Error in Configuration Builder 'AzureKeyVault'::GetValue(aspnet:PortableCompilationOutput)]
Microsoft.Configuration.ConfigurationBuilders.KeyValueConfigBuilder.GetValueInternal(String key) +429
Microsoft.Configuration.ConfigurationBuilders.KeyValueConfigBuilder.ProcessConfigurationSection(ConfigurationSection configSection) +207
System.Configuration.Internal.InternalConfigHost.System.Configuration.Internal.IInternalConfigurationBuilderHost.ProcessConfigurationSection(ConfigurationSection configSection, ConfigurationBuilder builder) +22
System.Configuration.Internal.DelegatingConfigHost.ProcessConfigurationSection(ConfigurationSection configSection, ConfigurationBuilder builder) +20
System.Configuration.BaseConfigurationRecord.CallHostProcessConfigurationSection(ConfigurationSection configSection, ConfigurationBuilder configBuilder) +50
Azure Key Vault
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(246.4, 20%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESM%3C/text%3E%3C/svg%3E)
Shweta Mathur 30,296 Reputation points Microsoft Employee Moderator2023-05-11T08:07:00.4766667+00:00 Hi @James ,
Thanks for reaching out.
This error requires deep troubleshooting.
Generally, this error comes in the context of custom attributes when there are multiple custom attributes of the same type found, causing ambiguity.
Based on the stackTrace ,it appears that the exception is thrown while trying to retrieve a custom attribute using the
System.Attribute.GetCustomAttributemethod. This method is called with anAssemblyobject and aTyperepresenting the attribute type. However, since there are multiple custom attributes of the same type, the method cannot determine which one to return, resulting in the exception.You can try to resolve this error by ensuring that only one version of the assembly is loaded in the application domain. You can also try to update the assembly to the latest version to see if that resolves the issue.
In case the above does not work for you, please send us an email on azcommunity [at] microsoft [dot] com referencing this issue with a subject line "ATTN:shweta" and we will help you with alternative support options on this.
Thanks,
Shweta
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