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Posted to dev@avro.apache.org by "Libing Sun (JIRA)" <ji...@apache.org> on 2012/11/10 03:21:11 UTC
[jira] [Updated] (AVRO-1199) SortedKeyValueFile$Writer.append
method have a puzzle for the sorted key
[ https://issues.apache.org/jira/browse/AVRO-1199?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Libing Sun updated AVRO-1199:
-----------------------------
Fix Version/s: 1.7.3
Hadoop Flags: Reviewed
Status: Patch Available (was: Open)
I submit a path ad this.
> SortedKeyValueFile$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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