Return-Path: 
 <dev-return-15214-apmail-avro-dev-archive=avro.apache.org@avro.apache.org>
X-Original-To: apmail-avro-dev-archive@www.apache.org
Delivered-To: apmail-avro-dev-archive@www.apache.org
Received: from mail.apache.org (hermes.apache.org [140.211.11.3])
	by minotaur.apache.org (Postfix) with SMTP id F1B98179E1
	for <apmail-avro-dev-archive@www.apache.org>;
 Fri,  3 Apr 2015 00:05:54 +0000 (UTC)
Received: (qmail 24877 invoked by uid 500); 3 Apr 2015 00:05:54 -0000
Delivered-To: apmail-avro-dev-archive@avro.apache.org
Received: (qmail 24803 invoked by uid 500); 3 Apr 2015 00:05:54 -0000
Mailing-List: contact dev-help@avro.apache.org; run by ezmlm
Precedence: bulk
List-Help: <mailto:dev-help@avro.apache.org>
List-Unsubscribe: <mailto:dev-unsubscribe@avro.apache.org>
List-Post: <mailto:dev@avro.apache.org>
List-Id: <dev.avro.apache.org>
Reply-To: dev@avro.apache.org
Delivered-To: mailing list dev@avro.apache.org
Received: (qmail 24791 invoked by uid 99); 3 Apr 2015 00:05:54 -0000
Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28)
    by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 03 Apr 2015 00:05:54 +0000
Date: Fri, 3 Apr 2015 00:05:54 +0000 (UTC)
From: "David Korz (JIRA)" <jira@apache.org>
To: dev@avro.apache.org
Message-ID: <JIRA.12787855.1428019540000.113600.1428019554647@Atlassian.JIRA>
In-Reply-To: <JIRA.12787855.1428019540000@Atlassian.JIRA>
References: <JIRA.12787855.1428019540000@Atlassian.JIRA>
 <JIRA.12787855.1428019540931@arcas>
Subject: [jira] [Created] (AVRO-1657) Namespaced reader schema w/field
 aliases can not read non-namespaced writer schema
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394

David Korz created AVRO-1657:
--------------------------------

             Summary: Namespaced reader schema w/field aliases can not read non-namespaced writer schema
                 Key: AVRO-1657
                 URL: https://issues.apache.org/jira/browse/AVRO-1657
             Project: Avro
          Issue Type: Bug
          Components: java
    Affects Versions: 1.7.7
            Reporter: David Korz


The writer uses a non-namespaced schema as follows:
{noformat}
{ 
    "type":"record",
    "name": "MyRecord",
    "fields":[
        {
            "type":"string",
            "name":"Name"
        },
        {
            "type":"double",
            "name":"Temperature"
        }
     ]
}
{noformat}
The reader uses a namespaced schema with a field alias.
{noformat}
{ 
    "type":"record",
    "name": "MyRecord",
    "namespace": "com.example",
    "aliases": [".MyRecord"],
    "fields":[
        {
            "type":"string",
            "name":"Name"
        },
        {
            "type":"double",
            "name":"TemperatureC",
            "aliases": ["Temperature"]
        }
     ]
}
{noformat}
The following reading code will fail.
{noformat}
DatumReader<MyRecord> datumReader = new SpecificDatumReader<>(MyRecord.class);
FileReader<MyRecord> fileReader = DataFileReader.openReader(file, datumReader);
        
MyRecord record = null;
while (fileReader.hasNext()) {
    record = fileReader.next(record);
    CharSequence name = record.getName();
    Double temp = record.getTemperatureC();
    System.out.println(name + " " + temp);
}
{noformat}
The reader's alias is not found.
{noformat}
Exception in thread "main" org.apache.avro.AvroTypeException: Found MyRecord, expecting com.example.MyRecord, missing required field TemperatureC
	at org.apache.avro.io.ResolvingDecoder.doAction(ResolvingDecoder.java:292)
	at org.apache.avro.io.parsing.Parser.advance(Parser.java:88)
	at org.apache.avro.io.ResolvingDecoder.readFieldOrder(ResolvingDecoder.java:130)
	at org.apache.avro.generic.GenericDatumReader.readRecord(GenericDatumReader.java:176)
	at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:151)
	at org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:142)
	at org.apache.avro.file.DataFileStream.next(DataFileStream.java:233)
{noformat}



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)