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From "Libing Sun (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AVRO-1199) SortedKeyValueFile$Writer.append method have a puzzle for the sorted key
Date Sat, 10 Nov 2012 02:21:11 GMT

     [ https://issues.apache.org/jira/browse/AVRO-1199?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Libing Sun updated AVRO-1199:
-----------------------------

    Fix Version/s: 1.7.3
     Hadoop Flags: Reviewed
           Status: Patch Available  (was: Open)

I submit a path ad this.
                
> SortedKeyValueFile$Writer.append method have a puzzle for the sorted key
> ------------------------------------------------------------------------
>
>                 Key: AVRO-1199
>                 URL: https://issues.apache.org/jira/browse/AVRO-1199
>             Project: Avro
>          Issue Type: Bug
>          Components: java
>    Affects Versions: 1.7.3
>            Reporter: Libing Sun
>              Labels: patch
>             Fix For: 1.7.3
>
>
> At the SortedKeyValueFile.java 539 lines like next:
> mPreviousKey = key;
> This class is same as Hadoop's MapFile, at the MapFile the same methon will keep a copy
for this key, but not use "=".
> If use "=" at here, when user append a reuse key object to this file. will cause key
sorted not valid.
> I think next code will fix it:
> private DataInputBuffer inBuf = new DataInputBuffer();
> private DataOutputBuffer outBuf = new DataOutputBuffer();
>       GenericDatumWriter<K> writer = new ReflectDatumWriter<K>(schema);
>       GenericDatumReader<K> reader = new ReflectDatumReader<K>(schema);
>       writer.write(key, encoder);
>       inBuf.reset(outBuf.getData(), outBuf.getLength());
>       BinaryDecoder decoder = DecoderFactory.get().directBinaryDecoder(inBuf,
>           null);
>       lastKey = reader.read(null, decoder); 

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