Fix for raven-ruby v3.x

lib/gitlab/error_tracking/processor/grpc_error_processor.rb

@@ -7,38 +7,32 @@ module Gitlab
         DEBUG_ERROR_STRING_REGEX = RE2('(.*) debug_error_string:(.*)')
 
         def process(value)
-          return value unless grpc_exception?(value)
-
-          process_message(value)
-          process_exception_values(value)
+          process_first_exception_value(value)
           process_custom_fingerprint(value)
 
           value
         end
 
-        def grpc_exception?(value)
-          value[:exception] && value[:message].start_with?('GRPC::')
-        end
+        # Sentry can report multiple exceptions in an event. Sanitize
+        # only the first one since that's what is used for grouping.
+        def process_first_exception_value(value)
+          exceptions = value.dig(:exception, :values)
 
-        def process_message(value)
-          message, debug_str = split_debug_error_string(value[:message])
+          return unless exceptions.is_a?(Array)
 
-          return unless message
+          entry = exceptions.first
 
-          value[:message] = message
-          extra = value[:extra] || {}
-          extra[:grpc_debug_error_string] = debug_str if debug_str
-        end
+          return unless entry.is_a?(Hash)
 
-        def process_exception_values(value)
-          exceptions = value.dig(:exception, :values)
+          raw_message = entry[:value]
 
-          return unless exceptions.is_a?(Array)
+          return unless raw_message.start_with?('GRPC::')
+
+          message, debug_str = split_debug_error_string(raw_message)
 
-          exceptions.each do |entry|
-            message, _ = split_debug_error_string(entry[:value])
           entry[:value] = message if message
-          end
+          extra = value[:extra] || {}
+          extra[:grpc_debug_error_string] = debug_str if debug_str
         end
 
         def process_custom_fingerprint(value)

spec/lib/gitlab/error_tracking/processor/grpc_error_processor_spec.rb

@@ -27,7 +27,6 @@ RSpec.describe Gitlab::ErrorTracking::Processor::GrpcErrorProcessor do
           extra: {
             caller: 'test'
           },
-          message: "GRPC::DeadlineExceeded: 4:DeadlineExceeded. debug_error_string:{\"hello\":1}",
           fingerprint: [
             "GRPC::DeadlineExceeded",
             "4:Deadline Exceeded. debug_error_string:{\"created\":\"@1598938192.005782000\",\"description\":\"Error received from peer unix:/home/git/gitalypraefect.socket\",\"file\":\"src/core/lib/surface/call.cc\",\"file_line\":1055,\"grpc_message\":\"Deadline Exceeded\",\"grpc_status\":4}"
@@ -37,7 +36,6 @@ RSpec.describe Gitlab::ErrorTracking::Processor::GrpcErrorProcessor do
 
       let(:expected) do
         {
-          message: "GRPC::DeadlineExceeded: 4:DeadlineExceeded.",
           fingerprint: [
             "GRPC::DeadlineExceeded",
             "4:Deadline Exceeded."