modify: replace key&value deserializer to CompatAvroDeserializer

kafka-rest/src/main/java/io/confluent/kafkarest/serializers/CompatAvroDeserializer.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2018 Confluent Inc.
+ *
+ * Licensed under the Confluent Community License (the "License"); you may not use
+ * this file except in compliance with the License.  You may obtain a copy of the
+ * License at
+ *
+ * http://www.confluent.io/confluent-community-license
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OF ANY KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+
+package io.confluent.kafkarest.serializers;
+
+import io.confluent.kafka.serializers.KafkaAvroDeserializer;
+import java.nio.ByteBuffer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class CompatAvroDeserializer extends KafkaAvroDeserializer {
+  private static final Logger log = LoggerFactory.getLogger(CompatAvroDeserializer.class);
+
+  @Override
+  public Object deserialize(String s, byte[] bytes) {
+    try {
+      ByteBuffer buffer = ByteBuffer.wrap(bytes);
+      buffer.get();
+      return super.deserialize(s, bytes);
+    } catch (Exception e) {
+      log.error("Failed to deserialize {}" + s, e.toString());
+      return e.toString();
+    }
+
+  }
+
+}

kafka-rest/src/main/java/io/confluent/kafkarest/v2/KafkaConsumerManager.java

@@ -221,8 +221,10 @@ public String createConsumer(String group, ConsumerInstanceConfig instanceConfig
 
       switch (instanceConfig.getFormat()) {
         case AVRO:
-          props.put("key.deserializer", "io.confluent.kafka.serializers.KafkaAvroDeserializer");
-          props.put("value.deserializer", "io.confluent.kafka.serializers.KafkaAvroDeserializer");
+          props.put("key.deserializer",
+                    "io.confluent.kafkarest.serializers.CompatAvroDeserializer");
+          props.put("value.deserializer",
+                    "io.confluent.kafkarest.serializers.CompatAvroDeserializer");
           break;
         case JSON:
         case BINARY: