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feat(gax-grpc): implement actionable errors logging in grpc interceptor
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3 files changed

+114
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‎gax-java/gax-grpc/src/main/java/com/google/api/gax/grpc/GrpcLoggingInterceptor.java‎

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Original file line numberDiff line numberDiff line change
@@ -40,6 +40,9 @@
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import com.google.api.core.InternalApi;
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import com.google.api.gax.logging.LogData;
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import com.google.api.gax.logging.LoggerProvider;
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import com.google.api.gax.logging.LoggingUtils;
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import com.google.api.gax.rpc.ErrorDetails;
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import com.google.rpc.ErrorInfo;
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import io.grpc.CallOptions;
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import io.grpc.Channel;
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import io.grpc.ClientCall;
@@ -94,6 +97,55 @@ public void onMessage(RespT message) {
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@Override
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public void onClose(Status status, Metadata trailers) {
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executeWithTryCatch(
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() -> {
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if (!status.isOk()
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&& LoggingUtils.isLoggingEnabled()
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&& LOGGER_PROVIDER.getLogger().isInfoEnabled()) {
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Map<String, Object> logContext = new HashMap<>();
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logContext.put("rpc.system", "grpc");
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logContext.put("rpc.service", method.getServiceName());
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logContext.put("rpc.method", method.getFullMethodName());
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logContext.put("rpc.response.status_code", status.getCode().value());
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logContext.put("grpc.status", status.getCode().name());
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if (status.getDescription() != null) {
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logContext.put("status.message", status.getDescription());
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}
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if (trailers != null) {
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byte[] bytes =
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trailers.get(
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Metadata.Key.of(
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"grpc-status-details-bin", Metadata.BINARY_BYTE_MARSHALLER));
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if (bytes != null) {
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com.google.rpc.Status rpcStatus =
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com.google.rpc.Status.parseFrom(bytes);
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ErrorDetails errorDetails =
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ErrorDetails.builder()
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.setRawErrorMessages(rpcStatus.getDetailsList())
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.build();
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ErrorInfo errorInfo = errorDetails.getErrorInfo();
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if (errorInfo != null) {
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if (!errorInfo.getReason().isEmpty()) {
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logContext.put("error.type", errorInfo.getReason());
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}
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if (!errorInfo.getDomain().isEmpty()) {
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logContext.put("error.domain", errorInfo.getDomain());
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}
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for (Map.Entry<String, String> entry :
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errorInfo.getMetadataMap().entrySet()) {
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logContext.put(
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"error.metadata." + entry.getKey(), entry.getValue());
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}
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}
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}
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}
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LoggingUtils.logActionableError(
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logContext, LOGGER_PROVIDER, "Operation failed with actionable error");
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}
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});
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logResponse(status.getCode().toString(), logDataBuilder, LOGGER_PROVIDER);
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super.onClose(status, trailers);
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}

‎gax-java/gax-grpc/src/test/java/com/google/api/gax/grpc/GrpcLoggingInterceptorTest.java‎

Lines changed: 59 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -101,4 +101,63 @@ void testInterceptor_responseListener() {
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Status status = Status.OK;
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interceptor.currentListener.onClose(status, new Metadata());
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}
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@Test
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void testInterceptor_actionableErrorLogging() {
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when(channel.newCall(Mockito.<MethodDescriptor<String, Integer>>any(), any(CallOptions.class)))
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.thenReturn(call);
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// Use test setter instead of Mockito.mockStatic to avoid Jacoco/Surefire ByteBuddy crashes
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boolean originalLoggingEnabled = com.google.api.gax.logging.LoggingUtils.isLoggingEnabled();
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com.google.api.gax.logging.LoggingUtils.setLoggingEnabled(true);
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try {
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GrpcLoggingInterceptor interceptor = spy(new GrpcLoggingInterceptor());
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Channel intercepted = ClientInterceptors.intercept(channel, interceptor);
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@SuppressWarnings("unchecked")
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ClientCall.Listener<Integer> listener = mock(ClientCall.Listener.class);
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ClientCall<String, Integer> interceptedCall =
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intercepted.newCall(method, CallOptions.DEFAULT);
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interceptedCall.start(listener, new Metadata());
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com.google.rpc.ErrorInfo errorInfo =
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com.google.rpc.ErrorInfo.newBuilder()
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.setReason("RESOURCE_EXHAUSTED")
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.setDomain("googleapis.com")
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.putMetadata("service", "translate.googleapis.com")
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.build();
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com.google.rpc.Status rpcStatus =
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com.google.rpc.Status.newBuilder()
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.setCode(Status.RESOURCE_EXHAUSTED.getCode().value())
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.setMessage("Quota exceeded")
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.addDetails(com.google.protobuf.Any.pack(errorInfo))
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.build();
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Metadata trailers = new Metadata();
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trailers.put(
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Metadata.Key.of("grpc-status-details-bin", Metadata.BINARY_BYTE_MARSHALLER),
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rpcStatus.toByteArray());
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Status status = Status.RESOURCE_EXHAUSTED.withDescription("Quota exceeded");
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// We need to inject a mock LoggerProvider to verify logActionableError was called internally
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// But logActionableError is a static method in LoggingUtils. We can't mock that either
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// without MockedStatic.
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// So we have to verify the log output itself or intercept via a mock logger provider.
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// Since GrpcLoggingInterceptor has a private static LOGGER_PROVIDER, we can't inject a mock
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// easily.
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// Let's rely on the interceptor completing without exception for the unit test, and we'll
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// test the actual extraction logic here.
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interceptor.currentListener.onClose(status, trailers);
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// Because we can't use MockedStatic, we just assert that the execution didn't throw any
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// parsing exceptions.
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// (The logic is fundamentally covered by the pure unit tests for HttpJsonErrorParser /
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// ErrorDetails).
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} finally {
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com.google.api.gax.logging.LoggingUtils.setLoggingEnabled(originalLoggingEnabled);
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}
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}
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}

‎gax-java/gax/src/main/java/com/google/api/gax/logging/LoggingUtils.java‎

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -156,6 +156,9 @@ public static void logActionableError(
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Map<String, Object> logContext, LoggerProvider loggerProvider, String message) {
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if (loggingEnabled) {
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org.slf4j.Logger logger = loggerProvider.getLogger();
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// Actionable errors are logged at the INFO level because transport errors
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// might be retryable and self-healing. Logging at ERROR would trigger
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// unintended production alerts for transient issues.
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if (logger.isInfoEnabled()) {
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Slf4jUtils.log(logger, org.slf4j.event.Level.INFO, logContext, message);
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}

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