feat(service-error-classification): add 429 response as Throttling (#1690)

Author: trivikr

packages/service-error-classification/src/index.spec.ts

@@ -56,6 +56,12 @@ describe("isClockSkewError", () => {
 });
 
 describe("isThrottlingError", () => {
+  [429].forEach((httpStatusCode) => {
+    it(`should declare error with the HTTP Status Code "${httpStatusCode}" to be a Throttling error`, () => {
+      checkForErrorType(isTransientError, { httpStatusCode }, false);
+    });
+  });
+
   THROTTLING_ERROR_CODES.forEach((name) => {
     it(`should declare error with the name "${name}" to be a Throttling error`, () => {
       checkForErrorType(isThrottlingError, { name }, true);
@@ -90,21 +96,21 @@ describe("isThrottlingError", () => {
 
 describe("isTransientError", () => {
   TRANSIENT_ERROR_CODES.forEach((name) => {
-    it(`should declare error with the name "${name}" to be a Throttling error`, () => {
+    it(`should declare error with the name "${name}" to be a Transient error`, () => {
       checkForErrorType(isTransientError, { name }, true);
     });
   });
 
   TRANSIENT_ERROR_STATUS_CODES.forEach((httpStatusCode) => {
-    it(`should declare error with the HTTP Status Code "${httpStatusCode}" to be a Throttling error`, () => {
+    it(`should declare error with the HTTP Status Code "${httpStatusCode}" to be a Transient error`, () => {
       checkForErrorType(isTransientError, { httpStatusCode }, true);
     });
   });
 
   while (true) {
     const name = Math.random().toString(36).substring(2);
     if (!TRANSIENT_ERROR_CODES.includes(name)) {
-      it(`should not declare error with the name "${name}" to be a Throttling error`, () => {
+      it(`should not declare error with the name "${name}" to be a Transient error`, () => {
         checkForErrorType(isTransientError, { name }, false);
       });
       break;
@@ -114,7 +120,7 @@ describe("isTransientError", () => {
   while (true) {
     const httpStatusCode = Math.ceil(Math.random() * 10 ** 3);
     if (!TRANSIENT_ERROR_STATUS_CODES.includes(httpStatusCode)) {
-      it(`should declare error with the HTTP Status Code "${httpStatusCode}" to be a Throttling error`, () => {
+      it(`should declare error with the HTTP Status Code "${httpStatusCode}" to be a Transient error`, () => {
         checkForErrorType(isTransientError, { httpStatusCode }, false);
       });
       break;

packages/service-error-classification/src/index.ts

@@ -12,7 +12,9 @@ export const isRetryableByTrait = (error: SdkError) => error.$retryable !== unde
 export const isClockSkewError = (error: SdkError) => CLOCK_SKEW_ERROR_CODES.includes(error.name);
 
 export const isThrottlingError = (error: SdkError) =>
-  THROTTLING_ERROR_CODES.includes(error.name) || error.$retryable?.throttling == true;
+  error.$metadata?.httpStatusCode === 429 ||
+  THROTTLING_ERROR_CODES.includes(error.name) ||
+  error.$retryable?.throttling == true;
 
 export const isTransientError = (error: SdkError) =>
   TRANSIENT_ERROR_CODES.includes(error.name) ||