[BUG] Resource Group Deletion failed but no exception was thrown

[dsalian26]

Describe the bug
Delete Resource Group request was made using azure java sdk. The delete resource group request was a blocking call and no exception/error was thrown. But on checking the resource group in azure portal, it was not deleted due to issue in deleting azure cluster.

Exception or Stack Trace

{"Error":{"Code":"ResourceDeletionFailed","Target":null,"Message":"The request to delete the resource 'Microsoft.ContainerService/managedClusters/65049f8921b3505b7da738b0-edge' failed. subscription id 'f642dc8a-5d3a-45a6-973b-2a0ae5ea2ec4', activity id '71fe1457-756b-4d6b-811d-e0083738948d', request correlation id '820ab55a-0eb3-4a90-af98-89a25177787a'.","Details":null,"AdditionalInfo":null}}

To Reproduce
This issue occurred only once and we have not been able to reproduce it again. But we would like to understand the root cause so that we can take appropriate measures if it occurs again in production environment.

Code Snippet
Here are the maven dependencies in the project.

<dependencyManagement>
  <dependencies>
      <dependency>
          <groupId>com.azure.spring</groupId>
          <artifactId>azure-spring-boot-bom</artifactId>
          <version>4.0.0</version>
          <type>pom</type>
          <scope>import</scope>
      </dependency>
      <dependency>
          <groupId>com.azure</groupId>
          <artifactId>azure-sdk-bom</artifactId>
          <version>1.2.2</version>
          <type>pom</type>
          <scope>import</scope>
      </dependency>
  </dependencies>
</dependencyManagement>

<dependencies>
  <!-- Main Azure Resource Manager dependency -->
  <dependency>
      <groupId>com.azure.resourcemanager</groupId>
      <artifactId>azure-resourcemanager</artifactId>
      <version>2.18.0</version>
  </dependency>

  <dependency>
      <groupId>org.awaitility</groupId>
      <artifactId>awaitility</artifactId>
      <version>4.0.3</version>
  </dependency>

  <dependency>
      <groupId>com.azure.resourcemanager</groupId>
      <artifactId>azure-resourcemanager-resources</artifactId>
      <version>2.18.0</version>
  </dependency>

  <dependency>
      <groupId>com.azure.resourcemanager</groupId>
      <artifactId>azure-resourcemanager-marketplaceordering</artifactId>
      <version>1.0.0-beta.1</version>
  </dependency>

  <dependency>
      <groupId>com.azure</groupId>
      <artifactId>azure-identity</artifactId>
      <exclusions>
          <!-- Excluding netty as we are using okHttp client -->
          <exclusion>
              <groupId>com.azure</groupId>
              <artifactId>azure-core-http-netty</artifactId>
          </exclusion>
      </exclusions>
  </dependency>
  <dependency>
      <groupId>com.azure</groupId>
      <artifactId>azure-core-http-okhttp</artifactId>
  </dependency>
...
<dependencies>

Here is the code snippet for calling azure sdk method

try {
    azureResourceManager.resourceGroups().deleteByName(resourceGroupName);
    log.info("Successfully deleted resourceGroup {}", resourceGroupName);
} catch (Exception var3) {
    throw AzureException.fromAzureError(var3).logErrorAsInfo(log);
}

On checking the sdk code, here is the snippet from the sdk code

@Override
public void deleteByName(String name) {
    deleteByNameAsync(name).block();
}

@Override
public Mono<Void> deleteByNameAsync(String name) {
    return manager().serviceClient().getResourceGroups().deleteAsync(name);
}

Expected behavior
The resource group should have been deleted but it was not deleted. If there was any failure during resource group deletion it should have been returned as an exception.

Screenshots
Not available

Setup (please complete the following information):

• OS: Linux
• IDE: Intellij
• Library/Libraries: Maven dependencies are added in Code snippets.
• Java version: 11
• App Server/Environment: Tomcat
• Frameworks: Spring Boot

Additional context
Not available

Information Checklist
Kindly make sure that you have added all the following information above and checkoff the required fields otherwise we will treat the issuer as an incomplete report

• Bug Description Added
• Repro Steps Added
• Setup information Added

[XiaofeiCao]

@dsalian26 Thanks for reporting. If the operation ends with success(the log successfully prints), the resource group should be successfully deleted.

Where did you encounter the error? Seems not related to the resource group?

[dsalian26]

@XiaofeiCao Yes the operation is successful when we check the sdk logs in the service, no exception thrown from sdk on deleteResourceGroup call.
But when we manually checked in the azure portal the resource group was not deleted and in activity logs, there was issue deleting the resource group, mainly an issue with the AKS cluster deletion. I have added the activity log message in the description.

[XiaofeiCao]

@dsalian26 . I'm not sure about the root cause. According to the Order of deletion, resource group is deleted after its child resources are deleted. And if one of its resource deletion fails, the whole operation will fail...

Could you check the provisioningState of your resource group? (It should be a property of the resource group).