fix(acm): DnsValidatedCertificate intermittently fails with "Cannot r…

…ead property 'Name' of undefined" (#18033)

There have been about a dozen reports of "Cannot read property 'Name' of
undefined" errors from the `DnsValidatedCertificate` over the last two
years. The most likely culprit seems to be a partial response from the ACM
DescribeCertificates API, where one ResourceRecord entry is present, but not the
others. Updated the wait condition to verify that all records are present.

fixes #8282


----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/@aws-cdk/aws-certificatemanager/lambda-packages/dns_validated_certificate_handler/lib/index.js

@@ -116,7 +116,8 @@ const requestCertificate = async function (requestId, domainName, subjectAlterna
       CertificateArn: reqCertResponse.CertificateArn
     }).promise();
     const options = Certificate.DomainValidationOptions || [];
-    if (options.length > 0 && options[0].ResourceRecord) {
+    // Ensure all records are ready; there is (at least a theory there's) a chance of a partial response here in rare cases.
+    if (options.length > 0 && options.every(opt => opt && !!opt.ResourceRecord)) {
       // some alternative names will produce the same validation record
       // as the main domain (eg. example.com + *.example.com)
       // filtering duplicates to avoid errors with adding the same record

packages/@aws-cdk/aws-certificatemanager/lambda-packages/dns_validated_certificate_handler/test/handler.test.js

@@ -47,6 +47,7 @@ describe('DNS Validated Certificate Handler', () => {
     handler.resetSleep();
     handler.resetMaxAttempts();
     AWS.restore();
+    nock.cleanAll();
     console.log = origLog;
     spySleep.resetHistory();
   });
@@ -380,6 +381,126 @@ describe('DNS Validated Certificate Handler', () => {
       });
   });
 
+  test('Create operation with `SubjectAlternativeNames` gracefully handles partial results from DescribeCertificate', () => {
+    const requestCertificateFake = sinon.fake.resolves({
+      CertificateArn: testCertificateArn,
+    });
+
+    const describeCertificateFake = sinon.stub();
+    describeCertificateFake.onFirstCall().resolves({
+      Certificate: {
+        CertificateArn: testCertificateArn,
+        DomainValidationOptions: [
+          {
+            ValidationStatus: 'PENDING_VALIDATION',
+            ResourceRecord: {
+              Name: testRRName,
+              Type: 'CNAME',
+              Value: testRRValue
+            }
+          },
+          {
+            ValidationStatus: 'PENDING_VALIDATION',
+          },
+        ]
+      }
+    });
+    describeCertificateFake.resolves({
+      Certificate: {
+        CertificateArn: testCertificateArn,
+        DomainValidationOptions: [
+          {
+            ValidationStatus: 'SUCCESS',
+            ResourceRecord: {
+              Name: testRRName,
+              Type: 'CNAME',
+              Value: testRRValue
+            }
+          },
+          {
+            ValidationStatus: 'SUCCESS',
+            ResourceRecord: {
+              Name: testAltRRName,
+              Type: 'CNAME',
+              Value: testAltRRValue
+            }
+          },
+        ]
+      }
+    });
+
+    const addTagsToCertificateFake = sinon.fake.resolves({
+      Certificate: testCertificateArn,
+      Tags: testTags,
+    });
+
+    const changeResourceRecordSetsFake = sinon.fake.resolves({
+      ChangeInfo: {
+        Id: 'bogus'
+      }
+    });
+
+    AWS.mock('ACM', 'requestCertificate', requestCertificateFake);
+    AWS.mock('ACM', 'describeCertificate', describeCertificateFake);
+    AWS.mock('ACM', 'addTagsToCertificate', addTagsToCertificateFake);
+    AWS.mock('Route53', 'changeResourceRecordSets', changeResourceRecordSetsFake);
+
+    const request = nock(ResponseURL).put('/', body => {
+      return body.Status === 'SUCCESS';
+    }).reply(200);
+
+    return LambdaTester(handler.certificateRequestHandler)
+      .event({
+        RequestType: 'Create',
+        RequestId: testRequestId,
+        ResourceProperties: {
+          DomainName: testDomainName,
+          HostedZoneId: testHostedZoneId,
+          Region: 'us-east-1',
+          Tags: testTags,
+        }
+      })
+      .expectResolve(() => {
+        sinon.assert.calledWith(requestCertificateFake, sinon.match({
+          DomainName: testDomainName,
+          ValidationMethod: 'DNS'
+        }));
+        sinon.assert.calledWith(changeResourceRecordSetsFake, sinon.match({
+          ChangeBatch: {
+            Changes: [
+              {
+                Action: 'UPSERT',
+                ResourceRecordSet: {
+                  Name: testRRName,
+                  Type: 'CNAME',
+                  TTL: 60,
+                  ResourceRecords: [{
+                    Value: testRRValue
+                  }]
+                }
+              }, {
+                Action: 'UPSERT',
+                ResourceRecordSet: {
+                  Name: testAltRRName,
+                  Type: 'CNAME',
+                  TTL: 60,
+                  ResourceRecords: [{
+                    Value: testAltRRValue
+                  }]
+                }
+              }
+            ]
+          },
+          HostedZoneId: testHostedZoneId
+        }));
+        sinon.assert.calledWith(addTagsToCertificateFake, sinon.match({
+          "CertificateArn": testCertificateArn,
+          "Tags": testTagsValue,
+        }));
+        expect(request.isDone()).toBe(true);
+      });
+  });
+
   test('Create operation fails after more than 60s if certificate has no DomainValidationOptions', () => {
     handler.withRandom(() => 0);
     const requestCertificateFake = sinon.fake.resolves({