fix: fix RetryInfo algorithm and tests (#2041)

Gax already parses ErrorDetails from an error response and add the error details to ApiException. Fix the RetryInfoAlgorithm to handle this correctly and the test to send error responses with the correct format.

Also fixed MutateRowsAttemptCallable to not use RetryInfoAlgorithm with the setting is disabled. 

Thank you for opening a Pull Request! Before submitting your PR, there are a few things you can do to make sure it goes smoothly:
- [ ] Make sure to open an issue as a [bug/issue](https://togithub.com/googleapis/java-bigtable/issues/new/choose) before writing your code!  That way we can discuss the change, evaluate designs, and agree on the general idea
- [ ] Ensure the tests and linter pass
- [ ] Code coverage does not decrease (if any source code was changed)
- [ ] Appropriate docs were updated (if necessary)
- [ ] Rollback plan is reviewed and LGTMed

Fixes #<issue_number_goes_here> ☕️

If you write sample code, please follow the [samples format](
https://togithub.com/GoogleCloudPlatform/java-docs-samples/blob/main/SAMPLE_FORMAT.md).

google-cloud-bigtable/clirr-ignored-differences.xml

@@ -156,4 +156,22 @@
         <className>com/google/cloud/bigtable/gaxx/retrying/ApiResultRetryAlgorithm</className>
         <field>*</field>
     </difference>
+    <!-- InternalApi was updated -->
+    <difference>
+        <differenceType>7004</differenceType>
+        <className>com/google/cloud/bigtable/data/v2/stub/mutaterows/MutateRowsRetryingCallable</className>
+        <method>*</method>
+    </difference>
+    <!-- InternalApi was updated -->
+    <difference>
+        <differenceType>7004</differenceType>
+        <className>com/google/cloud/bigtable/data/v2/models/MutateRowsException</className>
+        <method>*</method>
+    </difference>
+    <!-- InternalApi was updated -->
+    <difference>
+        <differenceType>7009</differenceType>
+        <className>com/google/cloud/bigtable/data/v2/models/MutateRowsException</className>
+        <method>*</method>
+    </difference>
 </differences>

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/models/MutateRowsException.java

@@ -17,6 +17,7 @@
 
 import com.google.api.core.InternalApi;
 import com.google.api.gax.rpc.ApiException;
+import com.google.api.gax.rpc.ErrorDetails;
 import com.google.api.gax.rpc.StatusCode;
 import com.google.auto.value.AutoValue;
 import com.google.bigtable.v2.MutateRowsRequest;
@@ -53,16 +54,36 @@ public Object getTransportCode() {
    * applications.
    */
   @InternalApi
-  public MutateRowsException(
+  public static MutateRowsException create(
       @Nullable Throwable rpcError,
       @Nonnull List<FailedMutation> failedMutations,
       boolean retryable) {
-    super("Some mutations failed to apply", rpcError, LOCAL_STATUS, retryable);
+    ErrorDetails errorDetails = null;
+    if (rpcError instanceof ApiException) {
+      errorDetails = ((ApiException) rpcError).getErrorDetails();
+    }
+
+    return new MutateRowsException(rpcError, failedMutations, retryable, errorDetails);
+  }
+
+  private MutateRowsException(
+      @Nullable Throwable rpcError,
+      @Nonnull List<FailedMutation> failedMutations,
+      boolean retryable,
+      @Nullable ErrorDetails errorDetails) {
+    super(rpcError, LOCAL_STATUS, retryable, errorDetails);
     Preconditions.checkNotNull(failedMutations);
     Preconditions.checkArgument(!failedMutations.isEmpty(), "failedMutations can't be empty");
     this.failedMutations = failedMutations;
   }
 
+  // TODO: remove this after we add a ctor in gax to pass in a Throwable, a message and error
+  // details.
+  @Override
+  public String getMessage() {
+    return "Some mutations failed to apply";
+  }
+
   /**
    * Retrieve all of the failed mutations. This list will contain failures for all of the mutations
    * that have failed across all of the retry attempts so far.

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/EnhancedBigtableStub.java

@@ -784,7 +784,8 @@ public Map<String, String> extract(MutateRowsRequest mutateRowsRequest) {
         clientContext.getDefaultCallContext(),
         withBigtableTracer,
         retryingExecutor,
-        settings.bulkMutateRowsSettings().getRetryableCodes());
+        settings.bulkMutateRowsSettings().getRetryableCodes(),
+        retryAlgorithm);
   }
 
   /**

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/mutaterows/MutateRowsAttemptCallable.java

@@ -19,7 +19,9 @@
 import com.google.api.core.ApiFuture;
 import com.google.api.core.ApiFutures;
 import com.google.api.gax.grpc.GrpcStatusCode;
+import com.google.api.gax.retrying.RetryAlgorithm;
 import com.google.api.gax.retrying.RetryingFuture;
+import com.google.api.gax.retrying.TimedAttemptSettings;
 import com.google.api.gax.rpc.ApiCallContext;
 import com.google.api.gax.rpc.ApiException;
 import com.google.api.gax.rpc.ApiExceptionFactory;
@@ -31,7 +33,6 @@
 import com.google.bigtable.v2.MutateRowsResponse.Entry;
 import com.google.cloud.bigtable.data.v2.models.MutateRowsException;
 import com.google.cloud.bigtable.data.v2.models.MutateRowsException.FailedMutation;
-import com.google.cloud.bigtable.gaxx.retrying.ApiExceptions;
 import com.google.cloud.bigtable.gaxx.retrying.NonCancellableFuture;
 import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
@@ -111,6 +112,8 @@ public Object getTransportCode() {
   @Nullable private List<Integer> originalIndexes;
   @Nonnull private final Set<StatusCode.Code> retryableCodes;
   @Nullable private final List<FailedMutation> permanentFailures;
+  @Nonnull private final RetryAlgorithm<MutateRowsRequest> retryAlgorithm;
+  @Nonnull private TimedAttemptSettings attemptSettings;
 
   // Parent controller
   private RetryingFuture<Void> externalFuture;
@@ -138,11 +141,14 @@ public List<MutateRowsResponse> apply(Throwable throwable) {
       @Nonnull UnaryCallable<MutateRowsRequest, List<MutateRowsResponse>> innerCallable,
       @Nonnull MutateRowsRequest originalRequest,
       @Nonnull ApiCallContext callContext,
-      @Nonnull Set<StatusCode.Code> retryableCodes) {
+      @Nonnull Set<StatusCode.Code> retryableCodes,
+      @Nonnull RetryAlgorithm<MutateRowsRequest> retryAlgorithm) {
     this.innerCallable = Preconditions.checkNotNull(innerCallable, "innerCallable");
     this.currentRequest = Preconditions.checkNotNull(originalRequest, "currentRequest");
     this.callContext = Preconditions.checkNotNull(callContext, "callContext");
     this.retryableCodes = Preconditions.checkNotNull(retryableCodes, "retryableCodes");
+    this.retryAlgorithm = retryAlgorithm;
+    this.attemptSettings = retryAlgorithm.createFirstAttempt();
 
     permanentFailures = Lists.newArrayList();
   }
@@ -230,14 +236,15 @@ private void handleAttemptError(Throwable rpcError) {
     Builder builder = lastRequest.toBuilder().clearEntries();
     List<Integer> newOriginalIndexes = Lists.newArrayList();
 
+    attemptSettings = retryAlgorithm.createNextAttempt(null, entryError, null, attemptSettings);
+
     for (int i = 0; i < currentRequest.getEntriesCount(); i++) {
       int origIndex = getOriginalIndex(i);
 
       FailedMutation failedMutation = FailedMutation.create(origIndex, entryError);
       allFailures.add(failedMutation);
 
-      if (!ApiExceptions.isRetryable2(failedMutation.getError())
-          && !failedMutation.getError().isRetryable()) {
+      if (!retryAlgorithm.shouldRetry(null, failedMutation.getError(), null, attemptSettings)) {
         permanentFailures.add(failedMutation);
       } else {
         // Schedule the mutation entry for the next RPC by adding it to the request builder and
@@ -250,15 +257,15 @@ private void handleAttemptError(Throwable rpcError) {
     currentRequest = builder.build();
     originalIndexes = newOriginalIndexes;
 
-    throw new MutateRowsException(rpcError, allFailures.build(), entryError.isRetryable());
+    throw MutateRowsException.create(rpcError, allFailures.build(), builder.getEntriesCount() > 0);
   }
 
   /**
    * Handle entry level failures. All new response entries are inspected for failure. If any
    * transient failures are found, their corresponding mutations are scheduled for the next RPC. The
    * caller is notified of both new found errors and pre-existing permanent errors in the thrown
    * {@link MutateRowsException}. If no errors exist, then the attempt future is successfully
-   * completed.
+   * completed. We don't currently handle RetryInfo on entry level failures.
    */
   private void handleAttemptSuccess(List<MutateRowsResponse> responses) {
     List<FailedMutation> allFailures = Lists.newArrayList(permanentFailures);
@@ -319,7 +326,7 @@ private void handleAttemptSuccess(List<MutateRowsResponse> responses) {
 
     if (!allFailures.isEmpty()) {
       boolean isRetryable = builder.getEntriesCount() > 0;
-      throw new MutateRowsException(null, allFailures, isRetryable);
+      throw MutateRowsException.create(null, allFailures, isRetryable);
     }
   }
 
@@ -354,10 +361,10 @@ private static ApiException createSyntheticErrorForRpcFailure(Throwable overallR
       ApiException requestApiException = (ApiException) overallRequestError;
 
       return ApiExceptionFactory.createException(
-          "Didn't receive a result for this mutation entry",
           overallRequestError,
           requestApiException.getStatusCode(),
-          requestApiException.isRetryable());
+          requestApiException.isRetryable(),
+          requestApiException.getErrorDetails());
     }
 
     return ApiExceptionFactory.createException(

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/mutaterows/MutateRowsRetryingCallable.java

@@ -16,6 +16,7 @@
 package com.google.cloud.bigtable.data.v2.stub.mutaterows;
 
 import com.google.api.core.InternalApi;
+import com.google.api.gax.retrying.RetryAlgorithm;
 import com.google.api.gax.retrying.RetryingExecutorWithContext;
 import com.google.api.gax.retrying.RetryingFuture;
 import com.google.api.gax.rpc.ApiCallContext;
@@ -44,23 +45,26 @@ public class MutateRowsRetryingCallable extends UnaryCallable<MutateRowsRequest,
   private final ServerStreamingCallable<MutateRowsRequest, MutateRowsResponse> callable;
   private final RetryingExecutorWithContext<Void> executor;
   private final ImmutableSet<Code> retryCodes;
+  private final RetryAlgorithm retryAlgorithm;
 
   public MutateRowsRetryingCallable(
       @Nonnull ApiCallContext callContextPrototype,
       @Nonnull ServerStreamingCallable<MutateRowsRequest, MutateRowsResponse> callable,
       @Nonnull RetryingExecutorWithContext<Void> executor,
-      @Nonnull Set<StatusCode.Code> retryCodes) {
+      @Nonnull Set<StatusCode.Code> retryCodes,
+      @Nonnull RetryAlgorithm retryAlgorithm) {
     this.callContextPrototype = Preconditions.checkNotNull(callContextPrototype);
     this.callable = Preconditions.checkNotNull(callable);
     this.executor = Preconditions.checkNotNull(executor);
     this.retryCodes = ImmutableSet.copyOf(retryCodes);
+    this.retryAlgorithm = retryAlgorithm;
   }
 
   @Override
   public RetryingFuture<Void> futureCall(MutateRowsRequest request, ApiCallContext inputContext) {
     ApiCallContext context = callContextPrototype.nullToSelf(inputContext);
     MutateRowsAttemptCallable retryCallable =
-        new MutateRowsAttemptCallable(callable.all(), request, context, retryCodes);
+        new MutateRowsAttemptCallable(callable.all(), request, context, retryCodes, retryAlgorithm);
 
     RetryingFuture<Void> retryingFuture = executor.createFuture(retryCallable, context);
     retryCallable.setExternalFuture(retryingFuture);

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/gaxx/retrying/RetryInfoRetryAlgorithm.java

@@ -20,12 +20,8 @@
 import com.google.api.gax.retrying.RetryingContext;
 import com.google.api.gax.retrying.TimedAttemptSettings;
 import com.google.api.gax.rpc.ApiException;
-import com.google.common.annotations.VisibleForTesting;
 import com.google.protobuf.util.Durations;
 import com.google.rpc.RetryInfo;
-import io.grpc.Metadata;
-import io.grpc.Status;
-import io.grpc.protobuf.ProtoUtils;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.threeten.bp.Duration;
 
@@ -37,10 +33,6 @@
 @InternalApi
 public class RetryInfoRetryAlgorithm<ResponseT> extends BasicResultRetryAlgorithm<ResponseT> {
 
-  @VisibleForTesting
-  public static final Metadata.Key<RetryInfo> RETRY_INFO_KEY =
-      ProtoUtils.keyForProto(RetryInfo.getDefaultInstance());
-
   @Override
   public TimedAttemptSettings createNextAttempt(
       Throwable prevThrowable, ResponseT prevResponse, TimedAttemptSettings prevSettings) {
@@ -50,6 +42,7 @@ public TimedAttemptSettings createNextAttempt(
           .toBuilder()
           .setRandomizedRetryDelay(retryDelay)
           .setAttemptCount(prevSettings.getAttemptCount() + 1)
+          .setOverallAttemptCount(prevSettings.getAttemptCount() + 1)
           .build();
     }
     return null;
@@ -93,17 +86,17 @@ static Duration extractRetryDelay(@Nullable Throwable throwable) {
     if (throwable == null) {
       return null;
     }
-    Metadata trailers = Status.trailersFromThrowable(throwable);
-    if (trailers == null) {
+    if (!(throwable instanceof ApiException)) {
       return null;
     }
-    RetryInfo retryInfo = trailers.get(RETRY_INFO_KEY);
-    if (retryInfo == null) {
+    ApiException exception = (ApiException) throwable;
+    if (exception.getErrorDetails() == null) {
       return null;
     }
-    if (!retryInfo.hasRetryDelay()) {
+    if (exception.getErrorDetails().getRetryInfo() == null) {
       return null;
     }
+    RetryInfo retryInfo = exception.getErrorDetails().getRetryInfo();
     return Duration.ofMillis(Durations.toMillis(retryInfo.getRetryDelay()));
   }
 }

google-cloud-bigtable/src/test/java/com/google/cloud/bigtable/data/v2/stub/RetryInfoTest.java

@@ -15,13 +15,13 @@
  */
 package com.google.cloud.bigtable.data.v2.stub;
 
-import static com.google.cloud.bigtable.gaxx.retrying.RetryInfoRetryAlgorithm.RETRY_INFO_KEY;
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.api.gax.core.NoCredentialsProvider;
 import com.google.api.gax.grpc.GrpcStatusCode;
 import com.google.api.gax.grpc.GrpcTransportChannel;
 import com.google.api.gax.rpc.ApiException;
+import com.google.api.gax.rpc.ErrorDetails;
 import com.google.api.gax.rpc.FixedTransportChannelProvider;
 import com.google.api.gax.rpc.InternalException;
 import com.google.api.gax.rpc.UnavailableException;
@@ -55,7 +55,9 @@
 import com.google.cloud.bigtable.data.v2.models.RowMutation;
 import com.google.cloud.bigtable.data.v2.models.RowMutationEntry;
 import com.google.common.base.Stopwatch;
+import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Queues;
+import com.google.protobuf.Any;
 import com.google.rpc.RetryInfo;
 import io.grpc.Metadata;
 import io.grpc.Status;
@@ -77,13 +79,16 @@ public class RetryInfoTest {
 
   @Rule public GrpcServerRule serverRule = new GrpcServerRule();
 
+  private static final Metadata.Key<byte[]> ERROR_DETAILS_KEY =
+      Metadata.Key.of("grpc-status-details-bin", Metadata.BINARY_BYTE_MARSHALLER);
+
   private FakeBigtableService service;
   private BigtableDataClient client;
   private BigtableDataSettings.Builder settings;
 
   private AtomicInteger attemptCounter = new AtomicInteger();
   private com.google.protobuf.Duration delay =
-      com.google.protobuf.Duration.newBuilder().setSeconds(1).setNanos(0).build();
+      com.google.protobuf.Duration.newBuilder().setSeconds(2).setNanos(0).build();
 
   @Before
   public void setUp() throws IOException {
@@ -366,27 +371,37 @@ private void verifyRetryInfoCanBeDisabled(Runnable runnable) {
   private void enqueueRetryableExceptionWithDelay(com.google.protobuf.Duration delay) {
     Metadata trailers = new Metadata();
     RetryInfo retryInfo = RetryInfo.newBuilder().setRetryDelay(delay).build();
-    trailers.put(RETRY_INFO_KEY, retryInfo);
+    ErrorDetails errorDetails =
+        ErrorDetails.builder().setRawErrorMessages(ImmutableList.of(Any.pack(retryInfo))).build();
+    byte[] status =
+        com.google.rpc.Status.newBuilder().addDetails(Any.pack(retryInfo)).build().toByteArray();
+    trailers.put(ERROR_DETAILS_KEY, status);
 
     ApiException exception =
         new UnavailableException(
             new StatusRuntimeException(Status.UNAVAILABLE, trailers),
             GrpcStatusCode.of(Status.Code.UNAVAILABLE),
-            true);
+            true,
+            errorDetails);
 
     service.expectations.add(exception);
   }
 
   private ApiException enqueueNonRetryableExceptionWithDelay(com.google.protobuf.Duration delay) {
     Metadata trailers = new Metadata();
     RetryInfo retryInfo = RetryInfo.newBuilder().setRetryDelay(delay).build();
-    trailers.put(RETRY_INFO_KEY, retryInfo);
+    ErrorDetails errorDetails =
+        ErrorDetails.builder().setRawErrorMessages(ImmutableList.of(Any.pack(retryInfo))).build();
+    byte[] status =
+        com.google.rpc.Status.newBuilder().addDetails(Any.pack(retryInfo)).build().toByteArray();
+    trailers.put(ERROR_DETAILS_KEY, status);
 
     ApiException exception =
         new InternalException(
             new StatusRuntimeException(Status.INTERNAL, trailers),
             GrpcStatusCode.of(Status.Code.INTERNAL),
-            false);
+            false,
+            errorDetails);
 
     service.expectations.add(exception);