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https://issues.apache.org/jira/browse/STORM-1504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15123105#comment-15123105
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ASF GitHub Bot commented on STORM-1504:
---------------------------------------

Github user abhishekagarwal87 commented on a diff in the pull request:

    https://github.com/apache/storm/pull/1052#discussion_r51231410
  
    --- Diff: 
external/storm-hdfs/src/main/java/org/apache/storm/hdfs/avro/ConfluentAvroSchemaRegistry.java
 ---
    @@ -0,0 +1,74 @@
    +/**
    + * Licensed to the Apache Software Foundation (ASF) under one
    + * or more contributor license agreements.  See the NOTICE file
    + * distributed with this work for additional information
    + * regarding copyright ownership.  The ASF licenses this file
    + * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +package org.apache.storm.hdfs.avro;
    +
    +import io.confluent.kafka.schemaregistry.client.CachedSchemaRegistryClient;
    +import io.confluent.kafka.schemaregistry.client.SchemaRegistryClient;
    +import 
io.confluent.kafka.schemaregistry.client.rest.exceptions.RestClientException;
    +import org.apache.avro.Schema;
    +
    +import java.io.IOException;
    +
    +/**
    + *
    + */
    +public class ConfluentAvroSchemaRegistry implements AvroSchemaRegistry {
    +
    +    SchemaRegistryClient theClient;
    +    final String url;
    +
    +    public ConfluentAvroSchemaRegistry(String url) {
    +        this.url = url;
    +    }
    +
    +    @Override
    +    public String getFingerprint(Schema schema) {
    +        if (theClient == null)
    +        {
    +            theClient = initializeClient();
    +        }
    +        String subject = schema.getName();
    +        final int version;
    +        try {
    +            version = theClient.register(subject, schema);
    --- End diff --
    
    is it a schema version or schema identifier? 


> AvroGenericRecordBolt will not work in a topology with multiple workers
> -----------------------------------------------------------------------
>
>                 Key: STORM-1504
>                 URL: https://issues.apache.org/jira/browse/STORM-1504
>             Project: Apache Storm
>          Issue Type: Bug
>            Reporter: Aaron Dossett
>            Assignee: Aaron Dossett
>            Priority: Critical
>
> It receives Avro GenericRecord objects, which leads to serialization errors 
> in a multi-worker topology.  Specifically, GenericData.Record will throw a 
> serialization error.
> A serializer for this class should be added and registered.



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